cvs: phpdoc-hk /language basic-syntax.xml variables.xml
[email protected] ("Kevin Kee") Sun, 15 Jun 2003 15:00:46 -0000
| Newsgroups | php.doc.hk |
|---|---|
| Message-ID | <cvskevinkee1055689246@cvsserver> |
kevinkee Sun Jun 15 11:00:46 2003 EDT
Modified files:
/phpdoc-hk/language basic-syntax.xml variables.xml
Log:
update 2 files
kevinkee-20030615110046.txt
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Index: phpdoc-hk/language/basic-syntax.xml diff -u phpdoc-hk/language/basic-syntax.xml:1.3 phpdoc-hk/language/basic-syntax.xml:1.4 --- phpdoc-hk/language/basic-syntax.xml:1.3 Wed Dec 12 15:50:28 2001 +++ phpdoc-hk/language/basic-syntax.xml Sun Jun 15 11:00:46 2003 @@ -1,128 +1,231 @@ <?xml version="1.0" encoding="big5"?> - <chapter id="language.basic-syntax"> - <title>°ò¥»¥yªk</title> +<!-- $Revision: 1.4 $ --> + <chapter id="language.basic-syntax"> + <title>°ò¥»»yªk</title> - <sect1 id="language.basic-syntax.phpmode"> - <title>¶i¤J PHP »y¨¥¼Ò¦¡</title> + <!-- + + NOTE: Last modified: 2001-05-16 13:00 GMT + + the language part is currently under heavy revision. Please do not + not make any heavy (i.e. structural) modifications to this part + for a moment. + + You'd also better not start any translation yet. + + Comments are always welcome at [email protected] + + Progress: + + intro : DOESN'T EXIST - yet? + new chapter, with some introductionary remarks? + Will be discussed on the ML soon. + basic-syntax: + FINISHED + except maybe moving the 'advanced escaping' + to a better place? + TODO: + - nada + types : Being revised. Added all new types + Boolean and Integer are more or less finished. + The rest isn't. + TODO: + - why is $foo[bar] bad syntax? + - what's the difference between unset($bla) and + $bla = NULL; (it is different!) + - $obj->{expr} syntax + - (unset) cast????? + - $bla = unset <== should've been nuked, don't mention it + - $str{offset} syntax, rather than $str[offset] + - read notes and apply when any of them are useful + - remove notes which have been included here. + - ... + the rest: Not yet started with. + TODO: + - ? + oop : has been revised by Kristian, DONE. + --> + + <sect1 id="language.basic-syntax.phpmode"> + <title>±q HTML ¤¤¶h¥X</title> - <para> - ¦b HTML ¤å¥ó¤¤´¡¤J PHP ªº«ü¥O¦@¦³¥|ºØ¤èªk: </para> + <para> + ·í PHP åªR¤@ÓÀɮ׮ɡA¥¦¬O¤£·|¹ï¤@¯ë¦r¤¸§@¥ô¦ó³B²z¡A°£«D¥¦¹J¤W¤F¨ä¤¤¤@Ó¯S®í¼ÐÅÒ¡A¼Ð©ú PHP µ{¦¡ªº¶}©l¡C³o®É¡APHP ¤~¶}©l¥H PHP µ{¦¡½X¨Ó¸ÑĶ¸Ó¬q¤å¦r¡A¦Ü¨ì¥¦¹J¤W PHP µ{¦¡½Xµ²§ôªº¼ÐÅÒ¡C¦¹µ²§À¼Ð°O¥H«áªº¤å¦r¤S·|³Q·í§@¬O´¶³q¤å¦r¨Ó³B²z¤F¡C³oºØ³B²z¤èªkÅý±z»´©öªº¦b HTML ¤å¥ó¤¤´O¤J PHP ªºµ{¦¡½X¡CPHP ¼ÐÅÒ¥H¤ºªº±N·í§@¬O PHP µ{¦¡½X¨ÓåªR¡B¼ÐÅÒ¥H¥~ªº«hì«Ê¤£°Ê¡C + </para> + + <para> + ¥Î¨Óªí¥Ü PHP µ{¦¡½X°Ï¶ôªº¼ÐÅÒ¦@¦³¥|®M¡A·í¤¤¥u¦³ <?php. . .?> ©M <script + language="php">. . .</script> ¨â®M¬O¸g±`¥i¥H¨Ï¥Îªº¡C¥t¥~¨â®M (<?. . . ?> ¤Î <script language="php">. . .</script>) ¥i¥H³q¹L³]©w &php.ini; ÀɨӶ}Ãö¡CÁöµMµu«¬ªº©M ASP ¦¡ªº¼ÐÅҨϥΰ_¨Ó¸û¬°¤è«K¡A¦ý¦bÝ®e¤W¥¦Ì«o©l²×¤ñ¤£¤Wªø«¬ªº¡C¨Ò¦p¡A¦pªG±zn¦b XML ©Î XHTML ¤¤´O¤J PHPµ{¦¡½X¡A¨º±z´N¤@©wn¨Ï¥Î <?php. . .?> «¬ªº¼ÐÅÒ¥H²Å¦X XML ªº¼Ð·Ç¤F¡C + </para> + + <para> + PHP ¤ä´©ªº¼ÐÅÒ¥]¬A¡G + </para> <para> <example> - <title>Ways of escaping from HTML</title> - <programlisting> -1. <? echo ("this is the simplest, an SGML processing instruction\n"); ?> - -2. <?php echo("if you want to serve XHTML or XML documents, do like this\n"); ?> - -3. <script language="php"> + <title>¶h¥X HTML ªº¤è¦¡</title> + <programlisting role="php"> +<![CDATA[ +1. <?php echo("if you want to serve XHTML or XML documents, do like this\n"); ?> + +2. <? echo ("this is the simplest, an SGML processing instruction\n"); ?> + <?= expression ?> This is a shortcut for "<? echo expression ?>" + +3. <script language="php"> echo ("some editors (like FrontPage) don't like processing instructions"); - </script> + </script> -4. <% echo ("You may optionally use ASP-style tags"); %> - <%= $variable; # This is a shortcut for "<%echo .." %> +4. <% echo ("You may optionally use ASP-style tags"); %> + <%= $variable; # This is a shortcut for "<% echo . . ." %> +]]> </programlisting> </example> </para> - <para> - ¤W±¦C¥Xªº¤èªk¤¤²Ä¤@ºØ¥u·í PHP ³Q³]©w¦¨±µ¨ü "µu¼ÐÅÒ" ®É¤~·|¦³®Ä¡C ³]©w¤èªk¥i¥H - <!-- via the <function>short_tags</function> function,-->¦b½Õ³]¤å¥ó PHP.INI ¤¤§â - <link linkend="ini.short-open-tag">short_open_tag</link> - ³]¬°¯uÈ¡A ©ÎªÌ¦b½sĶ PHP ®É°õ¦æ <command>configure</command> -®É¥[¤J --enable-short-tags ³oӿﶵ¡C - </para> - - <para> - The second way is the generally preferred method, as it allows for the - next generation of XHTML to be easily implemented with PHP. - </para> + <para> + ²Ä¤@ºØ¤èªk (<?php. . .?>) ¬O³Q«Øij¨Ï¥Îªº¡A¦]¬°¥¦¥i¥HÅý±z¦b²Å¦X XML ¼Ð·ÇªºXHTML ½X¤¤´O¤J PHP µ{¦¡½X¡C + </para> + + <para> + ²Ä¤GºØ¤èªk¥u¦³¦b±Ò°Ê¥H«á¤~¥i¥H¨Ï¥Î¡A¦Ó¶}±Òªº¤è¦¡¥]¬A¡G¨Ï¥Î <function>short_tags</function> ¨ç¼Æ (¥u¦³ PHP 3 ¦Ó¤w)¡A¦b PHP ²ÕºAÀɤ¤¶}±Ò <link linkend="ini.short-open-tag">short_open_tag</link>¡A©Î¦b½sĶ PHP ®É¦b <command>configure</command> ¥[¤J -enable-short-tag ¿ï¶µ¡C§Y¨Ï¦b php.ini-dist Àɤ¤³Q¹w³]¬°¶}±Ò¡Aµu«¬ªº¼ÐÅÒÁÙ¬O¤£³Q«Øij¨Ï¥Îªº¡C + </para> - <para> - ²Ä¥|ºØ¤èªk¤]¥u¦³·í ASP §ÎºAªº¼ÐÅÒ ³Q¤¹³\®É¤~¦³®Ä¡C ³o»Ýn½Õ³] -<link linkend="ini.asp-tags">asp_tags</link> -³oӰѼơC + <para> + ²Ä¥|ºØ ASP ¦¡ªº¼ÐÅÒ¥u¦³¦b²ÕºAÀɤ¤¶}±Ò¤F <link linkend="ini.asp-tags">asp_tags</link> «á¤~¯à¨Ï¥Î¡C <note> - <para>¹ï ASP-style ¼ÐÅÒªº¤ä´©±q PHP ²Ä 3.0.4 ª©¶}©l.</para> - </note></para> + <para>ASP ¦¡¼ÐÅÒªº¤ä´©¦b 3.0.4 ª©¥»¤~¥[¤Jªº¡C</para> + </note> + </para> + <note> <para> -µ{¦¡¬qªºµ²§ô¼Ð°O±N·|¥]¬A¸òÀH¦b¨ä«áªº´«¦æ²Å¸¹¡C (°²¦p¦³´«¦æ²Å¸¹ªº¸Ü¡C) -</para></sect1> - - <sect1 id="language.basic-syntax.instruction-separation"> - <title>¤À¹j«ü¥O</title> - - <simpara> - PHP ¦U«ü¥O¦æ¤§¶¡ªº¤À¹j¤èªk©M C¡B PERL ¬O¤@¼Ëªº¡C - ¨C¦æ«ü¥O¶¡¥Î¤À¸¹ ";" ¤À¶}¡C </simpara> + ¦b¶}µo¤j«¬µ{¦¡¡B½s¼g¥Î¨Ó¦A¤À°tªºµ{¦¡®w¡A©Î±N±zªºµ{¦¡³¡¸p¦b§O¤Hªº¦øªA¾¹¤W®É¡A§ÚÌ«Øij±z¨Ï¥Îªø«¬ªº PHP ¼ÐÅÒ¡A¦]¬°¨Ã«D©Ò¦³ªº¦øªA¾¹³£¶}±Ò¤Fµu¼ÐÅÒªº¤ä´©¡C + </para> + </note> - <para> - ¥Ñ©óµ{¦¡¬qµ²§ô¼ÐÅÒ¦P¼Ë¥Nªí«ü¥Oµ²§ô¡A ¦]¦¹¥H¤Uªº¨â¬qµ{¦¡¬O®ÄªG¬O¤@¼Ëªº¡C - <informalexample> - <programlisting> -<?php + <para> + µ{¦¡°Ï¶ôªºµ²§À¼Ð°O±N¥]¬AºòÀH¨ä«áªº´«¦æ¦r¤¸¡£Y¦³ªº¸Ü¡¤¡C¦¹¥~¡Aµ²§À¼Ð°O¤w¥]§t¤F¤À¸¹ (;)¡A©Ò¥H±z¤£¥²¦A¬°¥¦¥[¤W¡C + </para> + + <para> + PHP ¤¹³\±z¨Ï¥Î¦p¤Uªº¼gªk¡G + <example><title>¶i¶¥¶h¥X½d¨Ò</title> + <programlisting role="php"> +<![CDATA[ +<?php +if ($expression) { + ?> + <strong>This is true.</strong> + <?php +} else { + ?> + <strong>This is false.</strong> + <?php +} +?> +]]> + </programlisting> + </example> + ¤Wzµ{¦¡½X±N¦p±`ªº¹B§@¡A¦]¬°·í PHP ¹J¤W ?> µ²§À¼Ð°O®É¡A¥¦±N¤£¥[³B²zªº¿é¥X©Ò¦³¤å¦r¡Aª½¨ì¹J¤W¥t¤@Ó¶}©l¼ÐÅÒ¡C·í±zªºµ{¦¡»Ýn¿é¥X¤j¶qªº¤å¦r®É¡A¨Ï¥Î¤Wz¶h¥X¤èªk¿é¥X¤å¦r¨ä®Ä²v·|¤ñ¨Ï¥Î <function>echo</function> ©Î <function>print()</function> ¨ç¼Æ¨Ó±o§ó°ª¡C + </para> + </sect1> + + <sect1 id="language.basic-syntax.instruction-separation"> + <title>«ü¥O¤À¹j</title> + + <simpara> + PHP «ü¥Oªº¤À¹j»P C ©Î Perl ªº¬Û¦P¡A§Y¥H¤À¸¹ (;) ¨Óµ²§ô¤@¦æ±Ôz¡C + </simpara> + + <para> + µ²§À¼Ð°O (?>) ¤]¦P®É·N¨ýµÛ±Ôzªºµ²§ô¡AµL¶·¦A¥[¤À¸¹¡A©Ò¥H¤U¦C¨â¥y¬O¬Û¦Pªº¡G + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php echo "This is a test"; ?> -<?php echo "This is a test" ?> - </programlisting> - </informalexample></para></sect1> +<?php echo "This is a test" ?> +]]> + </programlisting> + </informalexample> + </para> + </sect1> - <sect1 id="language.basic-syntax.comments"> - <title>¥[ª`ÄÀªº¤èªk</title> + <sect1 id="language.basic-syntax.comments"> + <title>µù¸Ñ</title> - <para> - PHP ¤W¥i¥H¥Î C¡B C++¡B ©M Unix shell ªºª`ÄÀ¤èªk¡C ¦bª`ÄÀ¸¹¤ºªº¤º®e±N³Q PHP ¸ÑÄÀ¾¹©¿²¤¡C ¤ñ¦p»¡ : + <para> + PHP ¤ä´© C¡BC++ ©M Unix shell ¦¡ªºµù¸Ñ¤èªk¡C½d¨Ò¡G - <informalexample><programlisting> -<?php + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php echo "This is a test"; // This is a one-line c++ style comment /* This is a multi line comment yet another line of comment */ echo "This is yet another test"; echo "One Final Test"; # This is shell-style style comment ?> +]]> </programlisting> - </informalexample></para> - - <simpara> - ¦Ü©ó¨ººØ¥uª`¸Ñ¤@¦æªºª`ÄÀ²Å¸¹ªº§@¥Î½d³ò¥u·|¦b¥»¦æ¤º¦³®Ä¡C ( ¦p¥»¦æ¤¤¦P®É¥X²{ PHP µ{üF¬qµ²§ô²Å¸¹ "?>" «h¦b²Å¸¹«áªº¤å¦r±N¤£·|³Q©¿²¤¡C)</simpara> - <informalexample><programlisting> -<h1>This is an <?php # echo "simple";?> example.</h1> -<p>The header above will say 'This is an example'. -</programlisting></informalexample> - - <simpara> -¦pªG¬O C ªº®æ¦¡¨Ó°µª`ÄÀ¡A ª`·N¤£n¹³¤U¨Ò¯ë¦bª`ÄÀ¤¤¦A¥[ª`ÄÀ¡A §_«h·|³y¦¨¿ù»~¡C - -</simpara> + </informalexample> + </para> - <informalexample><programlisting> -<?php + <simpara> + ³æ¦æ¦¡ªºµùÄÀ¤è¦¡¥u¾A¥Î©ó¸Ó¦æ¡£¦Ü¦æ¥½¡¤¡A©Î©Ò¦b°Ï¶ôªº PHP µ{¦¡½X¤º¡Aµø¦óªÌ¥ý¥X²{¡C³oªí¥Ü // ?> «áªº HTML ½X±N·|³Q¿é¥X¡B?> ´N¸õ¥X PHP ¼Ò¦¡¡A¦Ó // «h¤£·|¼vÅT¨ì¼Ò¦¡ªºÂàÅÜ¡C + </simpara> + <informalexample> + <programlisting role="php"> +<![CDATA[ +<h1>This is an <?php # echo "simple";?> example.</h1> +<p>The header above will say 'This is an example'. +]]> + </programlisting> + </informalexample> + + <simpara> + ¦b¨Ï¥Î C ¦¡ªºµùÄÀ®É¡A¤d¸U§O±N¤@Ó C ¦¡µùÄÀ©ñ¦b¥t¤@Ӹ̱¡C³o¦bµùÄÀ¤j¬q¤å¦r®É¸g±`µo¥Í¡C + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php /* echo "This is a test"; /* This comment will cause a problem */ */ ?> - </programlisting></informalexample></sect1> - </chapter> +]]> + </programlisting> + </informalexample> + + </sect1> + </chapter> - <!-- Keep this comment at the end of the file - Local variables: - mode: sgml - sgml-omittag:t - sgml-shorttag:t - sgml-minimize-attributes:nil - sgml-always-quote-attributes:t - sgml-indent-step:1 - sgml-indent-data:t +<!-- Keep this comment at the end of the file +Local variables: +mode: sgml +sgml-omittag:t +sgml-shorttag:t +sgml-minimize-attributes:nil +sgml-always-quote-attributes:t +sgml-indent-step:1 +sgml-indent-data:t indent-tabs-mode:nil - sgml-parent-document:nil - sgml-default-dtd-file:"../manual.ced" - sgml-exposed-tags:nil - sgml-local-catalogs:nil - sgml-local-ecat-files:nil - End: - --> +sgml-parent-document:nil +sgml-default-dtd-file:"../../manual.ced" +sgml-exposed-tags:nil +sgml-local-catalogs:nil +sgml-local-ecat-files:nil +End: +vim600: syn=xml fen fdm=syntax fdl=2 si +vim: et tw=78 syn=sgml +vi: ts=1 sw=1 +--> Index: phpdoc-hk/language/variables.xml diff -u phpdoc-hk/language/variables.xml:1.4 phpdoc-hk/language/variables.xml:1.5 --- phpdoc-hk/language/variables.xml:1.4 Sat May 24 09:18:32 2003 +++ phpdoc-hk/language/variables.xml Sun Jun 15 11:00:46 2003 @@ -1,928 +1,812 @@ -<?xml version="1.0" encoding="big5"?> - <chapter id="language.variables"> - <title>¦UÃþÅܼÆ</title> - - <sect1 id="language.variables.basics"> - <title>°ò¥»ª¾ÃÑ</title> - - <simpara> - ©Ò¦³ PHP ªºÅܼƫe±³£¦³¤@Ó "$" ²Å¸¹¡A «á±¸òµÛÅܼƪº¦W¦r¡C ª`·NÅܼƦWºÙ¬O¤À¤j¤p¼gªº¡C - </simpara> - - <para> - PHP ªºÅܼƦWºÙ©M¨ä¥L¼ÐÅÒ¦³µÛ¬Û¦Pªº³W«h¡C¤@Ó¦³®ÄªºÅܼƬO¥Ñ^¤å¦r¥À©Î©³½u¶}©l¡A¸òµÛ¬O¥ô·Nªøµuªº¦r¥À¡B¼Æ¦r©Î©³½u¡C«ö¥¿³W¹Bºâ¦¡¡A¥¦¥i¥Hªí¹F¬°¡G'[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*' - </para> - - <note> - <simpara> - ª`¡G¦r¥À¬° a-z¡AA-Z¡A¦Ó ASCII ¦r²Å«h±q 127 ¦Ü 255¡q0x7f-0xff¡r¡C - </simpara> - </note> - - <para> - <informalexample> - <programlisting role="php"> -$var = "Bob"; -$Var = "Joe"; -echo "$var, $Var"; // outputs "Bob, Joe" - -$4site = 'not yet'; // invalid; starts with a number -$_4site = 'not yet'; // valid; starts with an underscore -$täyte = 'mansikka'; // valid; '?' is ASCII 228. - </programlisting> - </informalexample> - </para> - - <para> - ¦b PHP3 ªº®É´Á¡A «ü©wµ¹Åܼƪº³£¬OÈ¡A ¨Ò¦p§â¤@¦æªí¹F¦¡«ü©wµ¹Åܼƪº¸Ü¡A ÅܼƩÒÀx¦sªº±N¬Oªí¹F¦¡pºâ¥X¨ÓªºÈ¡C ¥¦ªº¤Þ¥Ó·N¸q¬O¦pªG§A§â¬YÅܼƫü©wµ¹¥t¤@ÓÅܼƫá¡A §ïÅܨ䤤¤@Óªº¤º®e¨Ã¤£·|¼vÅT¥t¥~ªº¤@Ó¡C ·Q¶i¤@¨BÁA¸Ñ³oºØ«ü©wÅܼƤèªk¡A ½Ð¬Ý -<link - linkend="language.expressions">ªí¹F¦¡</link>¤@¸`¡C - </para> - <para> - PHP4 «h´£¨Ñ¤F¥t¤@ºØ«ü©wÅܼƪº¤èªk: - <emphasis>ÅܼưѷÓ</emphasis>. ·N«ä¬O·sÅܼƥu¬O°Ñ·Ó¥»¨ÓªºÅܼƤ¤ªºÈ¡C (´«Ó»¡ªk¡A ·sªºÅܼƥu¬O¥»¨ÓªºÅܼƪº"§O¦W"¡A ¤]¥i»¡·sÅܼƬOÂÂÅܼƪº"«ü¼Ð") µL½×§ïÅÜþ¤@ÓÅܼơA §ï°Ê³£¦P®É¤Ï¬M¦b¥t¤@ÓÅܼƤ¤¡C ¥Ñ©óÂÂÅܼƪºÈ¨Ã¨S¦³³Q§Û¨ì·sÅܼƤ¤¡A ©Ò¥H³oºØ«ü©wÅܼƪº¤èªk°õ¦æ®É·|§Ö¤@ÂI¡A ¦ý¤]¥u¬O¤@ÂI¦Ó¤w¡C ¥u¦³¦b«ü©w¤j«¬ªº°}¦C¡Bª«¥ó©Î¬O¦b¤j¶qªº°j°é¾Þ§@¤¤¤~·|¬Ý¥X®Ä¯q¨Ó¡C - </para> - <para> - §@°Ñ·Ó«ü©wªº¤è¦¡¬O¦b³Q°Ñ·ÓªºÅܼÆ(ÂÂÅܼÆ)«e¥[¤WÓ(&) ²Å¸¹¡C ¹³¤U±ªº¥Ü¨Ò·|³sÄò¥´¥X¨â¥y¬Û¦Pªº¥y¤l: - - <informalexample> - <programlisting role="php"> -<?php -$foo = 'Bob'; // Assign the value 'Bob' to $foo -$bar = &$foo; // Reference $foo via $bar. -$bar = "My name is $bar"; // Alter $bar... -echo $foo; // $foo is altered too. -echo $bar; -?> - </programlisting> - </informalexample> - </para> - - <para> - ¦³¤@ÂI«Ü«nªº¬O¥u¦³¯u¥¿ªºÅܼƤ~¥i¥H§@¬°ÂÂÅܼƳQ°Ñ·Ó¡C - <informalexample> - <programlisting role="php"> -<?php -$foo = 25; -$bar = &$foo; // This is a valid assignment. -$bar = &(24 * 7); // Invalid; references an unnamed expression. - -function test() { - return 25; -} - -$bar = &test(); // Invalid. -?> - </programlisting> - </informalexample> - </para> - - </sect1> - - <sect1 id="language.variables.predefined"> - <title>¤w¹w³]¦nªºÅܼÆ</title> - - <simpara> - PHP provides a large number of predefined variables to any script - which it runs. Many of these variables, however, cannot be fully - documented as they are dependent upon which server is running, the - version and setup of the server, and other factors. Some of these - variables will not be available when PHP is run on the - command-line. - </simpara> - - <simpara> - Despite these factors, here is a list of predefined variables - available under a stock installation of PHP 3 running as a module - under a stock installation of <ulink - url="&url.apache;">Apache</ulink> 1.3.6. - </simpara> - - <simpara> - For a list of all predefined variables (and lots of other useful - information), please see (and use) <function>phpinfo</function>. - </simpara> - - <note> - <simpara> - This list is neither exhaustive nor intended to be. It is simply - a guideline as to what sorts of predefined variables you can - expect to have access to in your script. - </simpara> - </note> - - <sect2 id="language.variables.predefined.apache"> - <title>Apache variables</title> - - <simpara> - These variables are created by the <ulink - url="&url.apache;">Apache</ulink> webserver. If you are running - another webserver, there is no guarantee that it will provide the - same variables; it may omit some, or provide others not listed - here. That said, a large number of these variables are accounted - for in the <ulink url="&url.cgispec;">CGI 1.1 - specification</ulink>, so you should be able to expect those. - </simpara> - <simpara> - Note that few, if any, of these will be available (or indeed have - any meaning) if running PHP on the command line. - </simpara> - - <para> - <variablelist> - <varlistentry> - <term>GATEWAY_INTERFACE</term> - <listitem> - <simpara> - What revision of the CGI specification the server is using; - i.e. 'CGI/1.1'. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SERVER_NAME</term> - <listitem> - <simpara> - The name of the server host under which the current script is - executing. If the script is running on a virtual host, this - will be the value defined for that virtual host. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SERVER_SOFTWARE</term> - <listitem> - <simpara> - Server identification string, given in the headers when - responding to requests. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SERVER_PROTOCOL</term> - <listitem> - <simpara> - Name and revision of the information protocol via which the - page was requested; i.e. 'HTTP/1.0'; - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>REQUEST_METHOD</term> - <listitem> - <simpara> - Which request method was used to access the page; i.e. 'GET', - 'HEAD', 'POST', 'PUT'. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>QUERY_STRING</term> - <listitem> - <simpara> - The query string, if any, via which the page was accessed. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>DOCUMENT_ROOT</term> - <listitem> - <simpara> - The document root directory under which the current script is - executing, as defined in the server's configuration file. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_ACCEPT</term> - <listitem> - <simpara> - Contents of the <literal>Accept:</literal> header from the - current request, if there is one. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_ACCEPT_CHARSET</term> - <listitem> - <simpara> - Contents of the <literal>Accept-Charset:</literal> header - from the current request, if there is one. Example: - 'iso-8859-1,*,utf-8'. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_ACCEPT_ENCODING</term> - <listitem> - <simpara> - Contents of the <literal>Accept-Encoding:</literal> header - from the current request, if there is one. Example: 'gzip'. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_ACCEPT_LANGUAGE</term> - <listitem> - <simpara> - Contents of the <literal>Accept-Language:</literal> header - from the current request, if there is one. Example: 'en'. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_CONNECTION</term> - <listitem> - <simpara> - Contents of the <literal>Connection:</literal> header from - the current request, if there is one. Example: 'Keep-Alive'. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_HOST</term> - <listitem> - <simpara> - Contents of the <literal>Host:</literal> header from the - current request, if there is one. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_REFERER</term> - <listitem> - <simpara> - The address of the page (if any) which referred the browser - to the current page. This is set by the user's browser; not - all browsers will set this. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_USER_AGENT</term> - <listitem> - <simpara> - Contents of the <literal>User_Agent:</literal> header from - the current request, if there is one. This is a string - denoting the browser software being used to view the current - page; i.e. <computeroutput>Mozilla/4.5 [en] (X11; U; Linux - 2.2.9 i586)</computeroutput>. Among other things, you can use - this value with <function>get_browser</function> to tailor - your page's functionality to the capabilities of the user's - browser. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>REMOTE_ADDR</term> - <listitem> - <simpara> - The IP address from which the user is viewing the current - page. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>REMOTE_PORT</term> - <listitem> - <simpara> - The port being used on the user's machine to communicate with - the web server. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SCRIPT_FILENAME</term> - <listitem> - <simpara> - The absolute pathname of the currently executing script. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SERVER_ADMIN</term> - <listitem> - <simpara> - The value given to the SERVER_ADMIN (for Apache) directive in - the web server configuration file. If the script is running - on a virtual host, this will be the value defined for that - virtual host. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SERVER_PORT</term> - <listitem> - <simpara> - The port on the server machine being used by the web server - for communication. For default setups, this will be '80'; - using SSL, for instance, will change this to whatever your - defined secure HTTP port is. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SERVER_SIGNATURE</term> - <listitem> - <simpara> - String containing the server version and virtual host name - which are added to server-generated pages, if enabled. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>PATH_TRANSLATED</term> - <listitem> - <simpara> - Filesystem- (not document root-) based path to the current - script, after the server has done any virtual-to-real - mapping. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>SCRIPT_NAME</term> - <listitem> - <simpara> - Contains the current script's path. This is useful for pages - which need to point to themselves. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>REQUEST_URI</term> - <listitem> - <simpara> - The URI which was given in order to access this page; for - instance, '/index.html'. - </simpara> - </listitem> - </varlistentry> - </variablelist> - </para> - - </sect2> - - <sect2 id="language.variables.predefined.environment"> - <title>Environment variables</title> - - <simpara> - These variables are imported into PHP's global namespace from the - environment under which the PHP parser is running. Many are - provided by the shell under which PHP is running and different - systems are likely running different kinds of shells, a - definitive list is impossible. Please see your shell's - documentation for a list of defined environment variables. - </simpara> - <simpara> - Other environment variables include the CGI variables, placed - there regardless of whether PHP is running as a server module or - CGI processor. - </simpara> - - </sect2> - - <sect2 id="language.variables.predefined.php"> - <title>PHP variables</title> - - <simpara> - These variables are created by PHP itself. The - <varname>$HTTP_*_VARS</varname> variables are available only if - the <link linkend="ini.track-vars">track_vars</link> - configuration is turned on. When enabled, the variables are - always set, even if they are empty arrays. This prevents - a malicious user from spoofing these variables. - </simpara> - - <note> - <para> - As of PHP 4.0.3, <link - linkend="ini.track-vars">track_vars</link> is always turned on, - regardless of the configuration file setting. - </para> - </note> - - <para> - If the <link - linkend="ini.register-globals">register_globals</link> directive - is set, then these variables will also be made available in the - global scope of the script; i.e., separate from the - <varname>$HTTP_*_VARS</varname> arrays. This feature should be - used with care, and turned off if possible; while the - <varname>$HTTP_*_VARS</varname> variables are safe, the bare - global equivalents can be overwritten by user input, with - possibly malicious intent. If you cannot turn off <link - linkend="ini.register-globals">register_globals</link>, you must - take whatever steps are necessary to ensure that the data you are - using is safe. - </para> - - <para> - <variablelist> - <varlistentry> - <term>argv</term> - <listitem> - <simpara> - Array of arguments passed to the script. When the script is - run on the command line, this gives C-style access to the - command line parameters. When called via the GET method, this - will contain the query string. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>argc</term> - <listitem> - <simpara> - Contains the number of command line parameters passed to the - script (if run on the command line). - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>PHP_SELF</term> - <listitem> - <simpara> - The filename of the currently executing script, relative to - the document root. If PHP is running as a command-line - processor, this variable is not available. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_COOKIE_VARS</term> - <listitem> - <simpara> - An associative array of variables passed to the current - script via HTTP cookies. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_GET_VARS</term> - <listitem> - <simpara> - An associative array of variables passed to the current - script via the HTTP GET method. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_POST_VARS</term> - <listitem> - <simpara> - An associative array of variables passed to the current - script via the HTTP POST method. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_POST_FILES</term> - <listitem> - <simpara> - An associative array of variables containing information - about files uploaded via the HTTP POST method. See <link - linkend="features.file-upload.post-method">POST method - uploads</link> for information on the contents of - <varname>$HTTP_POST_FILES</varname>. - </simpara> - <para> - <varname>$HTTP_POST_FILES</varname> is available only in PHP - 4.0.0 and later. - </para> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_ENV_VARS</term> - <listitem> - <simpara> - An associative array of variables passed to the current - script via the parent environment. - </simpara> - </listitem> - </varlistentry> - - <varlistentry> - <term>HTTP_SERVER_VARS</term> - <listitem> - <simpara> - An associative array of variables passed to the current - script from the HTTP server. These variables are analogous to - the Apache variables described above. - </simpara> - </listitem> - </varlistentry> - </variablelist> - </para> - - </sect2> - - </sect1> - - - <sect1 id="language.variables.scope"> - <title>Åܼƪº¦³®Ä½d³ò</title> - - <simpara> - Åܼƪº¦³®Ä½d³ò¬O«ü¥u¦³¦b¸Ó½d³ò¤§¤º¹q¸£¤~ª¾¹D¦³³o¼Ë¤@ÓÅܼƦs¦b¨Ã¥i¦s¨ú¨ä©ÒÀxªºÈ¡C ¤j«eÃD¬O©Ò¦³ªº PHP ÅܼƳ£¥u¦³³æ¤@ªº¦³®Ä½d³ò¡C ³o¦³®Ä½d³ò¦ù®i¨ì³Q include() ©M require() ªº¤å¥ó¤¤¡C ½Ð¬Ý¥Ü½d: - - </simpara> - <informalexample> - <programlisting role="php"> -$a = 1; -include "b.inc"; - </programlisting> - </informalexample> - <simpara> - ¦b b.inc ¤å¥ó¤¤ $a ÅܼƪºÈ¤]¬O 1 ¡C µM¦Ó¡A ¦b¨ç¼Æ¤¤ªºÅܼƨ䦳®Ä½d³ò«h§½¦b¨ç¼Æªº¥»Å餧¤¤¡C ¸õ¶i¨ç¼Æ®É¹q¸£¤£·|ª¾¹D¦b¨ç¼Æ³Q½Õ¥Î¤§«e¦³¤°»òÅܼƴ¿³Q©w¸q¡A ¦Ó©Ò¦³¦b¨ç¼Æ°õ¦æ®É¤~©w¸qªºÅܼƦb¸õ¥X¨ç¼Æ«á³£·|®ø¥¢¡C ¦p¤U¨Ò: - </simpara> - - <informalexample> - <programlisting role="php"> -$a = 1; /* global scope */ - -Function Test () { - echo $a; /* reference to local scope variable */ -} - -Test (); - </programlisting> - </informalexample> - - <simpara> - ¸Óµ{¦¡¨Ã¤£·|¥´¥X¥ô¦óȦ]¬°¦b echo $a ³o¤@«ü¥O¤¤¡A $a ªº¦³®Ä½d³ò¥u¬O¦b¨ç¼Æ¤§¤¤¡A¦ý¦b¨ç¼Æ·í¤¤¨Ã¨S¦³©w¸q $a ªºÈ¡F ¥t¤@¤è±¦b¨ç¼Æ¥~ªº $a ªº¦³®Ä½d³ò¨Ã¤£·|¦ù®i¨ì¨ç¼ÆùØ¥h¡C ¦p§A¬O C µ{¦¡ûªº¸Ü½Ð¯d·N³oºØ¦³®Ä½d³òªº©wªk©M C ¤£¤@¼Ë¡G ¦b C ·í¤¤©Ò¦³¥Dµ{¦¡¤¤ªºÅܼƳ£¬O¥þ°ìÅܼơC (°£«D¦b¨ç¼Æ¤¤¥t¥~«ü©w¡C) ¦]¬° C ªº¤è¦¡·|¤£¤p¤ß¦b¨ç¼Æ¤¤§ï°Ê¤F¥~³¡ÅܼơA ©Ò¥H¦b PHP ¤§¤¤¦³¦p·Q¦s¨ú¥~³¡Åܼƪº¸Ü´N¥²¶·«Å§i¤@Ó¥þ°ìÅܼơC ¥Ü½d¦p¤U: - - </simpara> - - <informalexample> - <programlisting role="php"> -$a = 1; -$b = 2; - -Function Sum () { - global $a, $b; - - $b = $a + $b; -} - -Sum (); -echo $b; - </programlisting> - </informalexample> - - <simpara> -¤W±ªº¨Ò¤l¤~·|¦L¥X "3"¡C ¦b¨ç¼Æ¤¤«Å§i $a¡B$b ¬°¥þ°ìÅܼƤ§«á´N¥i¥H¦s¨ú¦b¨ç¼Æ¥~±ªºÅܼơC ¤@Ó¨ç¼Æ¥i¥H«Å§i¥ô·N¦hÓ¥þ°ìÅܼơC - </simpara> - - <simpara> - ¥t¥~¤@Ó¦s¨ú¥~³¡Åܼƪº¤èªk¬O½Õ¥Î PHP ¤º¸mªº $GLOBALS[] °}¦C¡C ²{¦b§â«e±ªº¨Ò¤l§ï¼g¤@¤U: </simpara> - - <informalexample> - <programlisting role="php"> -$a = 1; -$b = 2; - -Function Sum () { - $GLOBALS["b"] = $GLOBALS["a"] + $GLOBALS["b"]; -} - -Sum (); -echo $b; - </programlisting> - </informalexample> - - <simpara> -$GLOBALS °}¦C¬O¤@ÓÃöÁp¦r¯Á¤Þ¦¡°}¦C¡A Åܼƪº¦W¦r·|§@¬°¦b¦s¨ú¸Ó°}¦Cªº¯Á¤Þ¡C </simpara> - - <simpara> -¥t¤@Ó«nªºÅܼƦ³®Ä½d³òªº·§©À¬O³Q«Å§i¦¨ static Ãþ«¬(ÀRºA)ªºÅܼơC ÀRºAÅܼƥu¦b¨ç¼Æ¤§¤¤¥X²{¡A ¤£¹L¦b¸õ¥X¨ç¼Æ¤§«á¥¦ÌªºÈ¨Ã¤£·|®ø¥¢¡C ¦Ò¼{¤U±ªº±¡ªp: </simpara> - - <informalexample> - <programlisting role="php"> -Function Test () { - $a = 0; - echo $a; - $a++; -} - </programlisting> - </informalexample> - - <simpara> -¤W±ªº¨ç¼Æ®Ú¥»°_¤£¤F§@¥Î¦]¬°¨C¦¸¶i¤J¨ç¼Æ«á $a ³£·|³Q«·s«ü©w¬° "0"¡E $a++ ³o¤@¥y«ü¥O¤@ÂI¥Î¤]¨S¦³¦]¬°¨C¦¸¸õ¥X¨ç¼Æ®É $a ´N®ø¥¢¤F¡C ¬°¤F¥O¨ç¼Æ¦¨¬°¦³¥Îªºp¼Æ¾¹¡A ¥²¶·§â $a «Å§i¬° static: - - </simpara> - - <informalexample> - <programlisting role="php"> -Function Test () { - static $a = 0; - echo $a; - $a++; -} - </programlisting> - </informalexample> - - <simpara> -²{¦b test() ¨ç¼Æ·|¦L¥X $a ªºÈ¨Ã§âÈ¥¦¥[ 1¡C </simpara> - - <simpara> - ÀRºAÅܼƤ]¥i¥H¥Î¨Ó½s¼g»¼Âk¨ç¼Æ recursive function¡C ³oÃþ¨ç¼Æ·|½Õ¥Î¦Û¤v¡C ¼g³oÃþ¨ç¼Æ®ÉnÁקKµL´`Àô¦a½Õ¥Î¡C §A¤@©wn¦³¿ìªk§â»¼Âk²×¤î¡C ¤U¨Ò¥Î $count ÅܼƨÓp¼Æ¡A ·í¥¦¼Æ¨ì 10 ªº®ÉÔ´N¸õ¥X¨ç¼Æ: - - </simpara> - - <informalexample> - <programlisting role="php"> -Function Test () { - static $count = 0; - - $count++; - echo $count; - if ($count < 10) { - Test (); - } - $count--; -} - </programlisting> - </informalexample> - - </sect1> - - <sect1 id="language.variables.variable"> - <title>¥ÎÅܼƨӽեÎÅܼÆ</title> - - <simpara> - ¦³ªº±¡ÒX¤U¡A ¥Î¤@ÓÅܼƨÓÀx¦s¥t¤@ÓÅܼƪº¦W¦r·|¥O½sµ{§ó¤è«K¡C ¦]¬°³o¼Ë¤@¨Ó¥i¥H°ÊºA¦a½Õ¥ÎÅܼơC ¤@Ó¥¿±`ªºÅܼƫŧi¬O³o¼Ëªº: - </simpara> - - <informalexample> - <programlisting role="php"> -$a = "hello"; - </programlisting> - </informalexample> - - <simpara> -¦Ó¤@ÓÅܼƪºÅܼƫh§â¦s¦b¨ä¤¤ªºÈ·í°µ¬O¥t¤@ÓÅܼƪº¦W¦r¡C ¦b¤W¨Òªº $a ¤§«e¥Î¨â '$' ¸¹ªº¸Ü¡A hello´N·|³Q·í¦¨¬O¥t¤@ÓÅܼƪº¦W¦r¡G - - </simpara> - - <informalexample> - <programlisting role="php"> -$$a = "world"; - </programlisting> - </informalexample> - - <simpara> -¨ì³oùج°¤î¡A ¤@¦@«Å§i¤F¨âÓÅܼơA ¤@Ó¬O $a¡A ¥t¤@Ó¬O $hello¡C ¬O¥H¤U±ªº«ü¥O¡G - - </simpara> - - <informalexample> - <programlisting role="php"> -echo "$a ${$a}"; - </programlisting> - </informalexample> - - <simpara> -©Ò¦L¥X¨Óªºµ²ªG©M³o¤@¥y - - </simpara> - - <informalexample> - <programlisting> -echo "$a $hello"; - </programlisting> - </informalexample> - - <simpara> -ªºµ²ªG¬O¤@¼Ëªº¡G hello world. - - </simpara> - - <simpara> -¦b¥ÎÅܼƪºÅܼƳoªk¤l¨Ó¦s¨ú°}¦Cªº¸Ü¡A n¯d·N $$a[1] ¦³¨âÓ·N«ä¡G ¥i¥H¬O«ü $a[1] ¬O¤@ÓÅܼƪº¦WºÙ¡B¤]¥i¥H«ü $$a ¬O¤@ÓÅܼƦWºÙ¦Ó [1] ¬O¸ÓÅܼƤ¤¤¸¯Àªº¯Á¤Þ ¸¹¡C ¬°¤F©ú½T§i¶D¹q¸£§Aªº·N¹Ï¡A ¥Î ${$a[1]} ¥Nªí²Ä¤@Ó·N«ä¡B ${$a}[1] ¥Nªí²Ä¤GÓ¡C - </simpara> - - </sect1> - - <sect1 id="language.variables.external"> - <title>¥~³¡ÅܼÆ</title> - - <sect2 id="language.variables.external.form"> - <title>HTML ªí (GET and POST) -</title> - - <simpara> -·íªí³æ³Q´£¥æµ¹ PHP µ{¦¡®É¡A ©Ò¦³¦bªí³æ¤¤ªºÅܼƳ£¦Û°Êµ¹¤À¹j¶}¨Ã¶Çµ¹µ{¦¡¡C °²¦p¦³¤@±i¦p¤U¨Òªºªí³æ: -If the <link linkend="ini.track-vars">track_vars</link> - configuration option is turned on, then these variables will be - located in the associative arrays - <varname>$HTTP_POST_VARS</varname>, - <varname>$HTTP_GET_VARS</varname>, and/or - <varname>$HTTP_POST_FILES</varname>, according to the - source of the variable in question. - </simpara> - - <para> - For more information on these variables, please read <link - linkend="language.variables.predefined">Predefined - variables</link>. - </para> - - <para> - <example> - <title>²³æªºªí³æÅܼÆ</title> - <programlisting role="php"> -<form action="foo.php" method="post"> - Name: <input type="text" name="username"><br> - <input type="submit"> -</form> - </programlisting> - </example> - </para> - - <para> -·í«ö¤U SUBMIT «á¡A PHP ·|¦Û°Ê«ü©wÅÜ¼Æ $name ¡A ¨ä¤¤·|Àx¦sªí³æ¤¤ Name: ³o¤@Äæ©Ò§tªºÈ¡C -PHP ¦³Ó¥s track_vars ªº¥i½Õ¶µ¡A ¦b¶}ªºª¬ºA¤U¥Î POST ©Î GET ¤èªk´£¥æªºªí³æÄæ¦ì¥i¥H¦b¬ÛÀ³ªº $HTTP_POST_VARS ©Î $HTTP_GET_VARS °}¦C¤¤§ä¨ì¡C n¥´¶}³oÓ¥\¯à¥i¥H§ï track_vars ³oӰѼƩΨϥΠ<?php_track_vars?> «ü¥O¡C - </para> - - <simpara> -PHP ÁÙ¥i¥H¤À¸Ñªí³æ¤¤°}¦C«¬ºAªºÅܼơC §A¥i§Q¥Î³o¤@¯S©Ê§â¬ÛÃöªºÅܼƤÀ²Õ©ÎªÌ¬OÀx¦s®e³\¦h¶µ¿ï¾Üªºªí³æÄæ¦ì: - - </simpara> - - <para> - <example> - <title>½ÆÂø¤@¨Çªºªí³æ -</title> - <programlisting role="php"> -<form action="array.php" method="post"> - Name: <input type="text" name="personal[name]"><br> - Email: <input type="text" name="personal[email]"><br> - Beer: <br> - <select multiple name="beer[]"> - <option value="warthog">Warthog - <option value="guinness">Guinness - <option value="stuttgarter">Stuttgarter Schwabenbräu - </select> - <input type="submit"> -</form> - </programlisting> - </example> - </para> - - <para> - In PHP 3, the array form variable usage is limited to - single-dimensional arrays. In PHP 4, no such restriction applies. - </para> - - <sect3 id="language.variables.external.form.submit"> - <title>¥Î IMAGE SUBMIT ªºÅܼƦW</title> - - <simpara> - ´£¥æªí³æ®É¡A ¥i¥H¤£¥Î¼Ð·Çªº«ö¶s¦Ó¥Î¹Ï®×¥N´À¡C ¥yªk¦p¤U:</simpara> - - <informalexample> - <programlisting role="php"> -<input type=image src="image.gif" name="sub"> - </programlisting> - </informalexample> - - <simpara> -·í¨Ï¥ÎªÌ«ö¦b¸Ó¹Ï®×¤W®É¡A ¶Ç¥hµ¹¦øªA¾¹ªºªí³æ¸ê®Æ·|¦³¨âÓ·sªºÈ sub_x ©M sub_y¡A ¤À§O¬O¨Ï¥ÎªÌ«ö¦b¹Ï®×¤Wªº®y¼Ð¡C ªí³æ¦Ñ¤âÌ¥i¯à·|ª¾¹D¨ä¹ê°eµ¹¦øªA¾¹ªºªºÄæ¦ì¬O sub.x ©M sub.y¡A ¤£¹L PHP ¦Û°Ê§â¥y¸¹Åܦ¨¤F©³½u¸¹¡C - - </simpara> - </sect3> - - </sect2> - - <sect2 id="language.variables.external.cookies"> - <title>HTTP cookies (²¢»æ ?) -</title> - - <simpara> -PHP ¤ä«ù¥Ñ <ulink - url="&spec.cookies;">Netscape's Spec</ulink>©Ò©w¸qªº HTTP cookies¡C Cookies ¬O§â¸ê®Æ¦s¨ì«È¤á¾÷¤Wªº¤@ºØ¤èªk¡C ³o¨Ç¸ê®Æ¥i¥H¥Î¨Ó¿ë§O¥Î¤áªº¨¥÷¡C n³]©w COOKIES ¥i¥Î SetCookie() ¨ç¼Æ¡C ¦]¬° COOKIES ¬O HTTP HEADER ¼ÐÀYªº¤@³¡¥÷©Ò¥H°e¥X COOKIE ªº©R¥O¥²¶·§â¶±¤º®e¿é¥Xµ¹ÂsÄý¾¹¤§«e°õ¦æ¡C ³o¨î©M¨Ï¥Î Header() ¨ç¼Æªº¨î¬O¤@¼Ëªº¡C ¦Ü©ó±qÂsÄý¾¹°e¦^¨Óªº COOKIES «h¹³ GET¡B POST ¤èªk¤@¼Ë·|¦Û°Ê¦s¦bÅܼÆùØ¡C -</simpara> - - <simpara> -¦p·Q¥Î¤@Ó COOKIE ¦s¦h¹L¤@ÓÈ¡A ¥u»Ý¦b COOKIE ¦W¦r«á¥[¤W []¡C ¥Ü½d: - </simpara> - - <informalexample> - <programlisting role="php"> -SetCookie ("MyCookie[]", "Testing", time()+3600); - </programlisting> - </informalexample> - - <simpara> -ª`·N°£«D¸ô®|©Îºô°ì¦W¦r¤£¤@¼Ë¡A ¤£µM§A°e¥Xªº COOKIE ·|¨ú¥N¤§«e¦P¦Wªº COOKIE¡C ¦]¦¹¦b½s¼gÁʪ«Äxµ{¦¡®É¦³®Én¥[¤@Óp¼Æ¾¹¡C ´N¹³³o¼Ë¡G - - </simpara> - - <example> - <title>SetCookie ¥Ü½d</title> - <programlisting role="php"> -$Count++; -SetCookie ("Count", $Count, time()+3600); -SetCookie ("Cart[$Count]", $item, time()+3600); - </programlisting> - </example> - - </sect2> - - <sect2 id="language.variables.external.environment"> - <title>§@·~Àô¹ÒÅܼÆ</title> - - <para> -PHP ·|¦Û°Ê§âÃö©ó§@·~Àô¹Òªº¸ê®Æ¾ã²z¦¨¤@¯ëªºÅܼƨѵ{¦¡¨ú¥Î¡C - - <informalexample> - <programlisting role="php"> -echo $HOME; /* Shows the HOME environment variable, if set. */ - </programlisting> - </informalexample> - </para> - - <para> -¤p¤ß°_¨£¡A Ū¨úÀô¹ÒÅܼƮɳ̦n¥Î <function>getenv</function>¨ç¼Æ¡A ³o¬O¦]¬° PHP ¤@¼Ë¬°ªí³æ¡BCOOKIE µ¥µ¥¦Û°Ê©w¸qÅܼơA ¦³®ÉÔ·|¤£¤p¤ß¥Î¤F¬Û¦Pªº¦W¦r¡A ¨ì®É§AŪ¨úªº¥i¯à¨Ã¤£¬O¯u¥¿ªºÀô¹ÒÅܼơC §ï°ÊÀô¹ÒÅܼƫh¥i¥Î - <function>putenv</function>¨ç¼Æ¡C - </para> - </sect2> - - <sect2 id="language.variables.external.dot-in-names"> - <title>±a '.' ¸¹ªºÅܼÆ</title> - - <para> -°ò¥»¤W PHP ¤£·|¾Õ§ïÅܼƪº¦W¦r¡A ¦ý¥Ñ©ó PHP ¤§¤¤ '.' ¸¹¦³¯S§Oªº·N«ä(¦ê±µ¤å¥y)¤£¥i¥H§@¬°ÅܼƦW¦r¡A ©Ò¥H±a '.' ¸¹ªºÅܼƦWºÙ¤¤ªº '.' ·|Åܦ¨ '_': - <programlisting role="php"> -$varname.ext; /* invalid variable name */ - </programlisting> -¤W±½d¨Ò¤¤ PHP ·|²z¸Ñ¬°¤@ÓÅÜ¼Æ $varname¡A «á±¸òµÛ¦A¦ê±µ¥t¤@ÓÅÜ¼Æ $ext¡C ÅãµM PHP ²z¸Ñ¿ù¤F¥»¨Óªº¥Î·N¡C - </para> - - </sect2> - - <sect2 id="language.variables.determining-type-of"> - <title>¬d¸ßÅܼƪº§ÎºA -</title> - - <para> - ¥Ñ©ó PHP ·|¨Ì¤º®e¦Û°Ê³]©wÅܼƪº§ÎºA¡A ¦³®ÉÔ«ÜÃø¤@²´¬Ý¥X¤@ÓÅܼƨ쩳¨ú¥Î¤F¨º¤@ºØ§ÎºA¡C ¬°¤FÅý¥ÎªÌ¨ú±o³oÃþ¸ê°T¡A PHP ¦³¦n¦hÓ¨ç¼Æ¥i¥H½Õ¥Î¡G - <function>gettype</function>, <function>is_long</function>, - <function>is_double</function>, <function>is_string</function>, - <function>is_array</function>,©M - <function>is_object</function>. - </para> - </sect2> - - </sect1> - - </chapter> - - <!-- Keep this comment at the end of the file - Local variables: - mode: sgml - sgml-omittag:t - sgml-shorttag:t - sgml-minimize-attributes:nil - sgml-always-quote-attributes:t - sgml-indent-step:1 - sgml-indent-data:t -indent-tabs-mode:nil - sgml-parent-document:nil - sgml-default-dtd-file:"../../manual.ced" - sgml-exposed-tags:nil - sgml-local-catalogs:nil - sgml-local-ecat-files:nil - End: - --> +<?xml version="1.0" encoding="big5"?> +<!-- $Revision: 1.5 $ --> + <chapter id="language.variables"> + <title>¦UÃþÅܼÆ</title> + + <sect1 id="language.variables.basics"> + <title>°ò¥»ª¾ÃÑ</title> + + <simpara> + ©Ò¦³ PHP ªºÅܼƳ£¬O¥H "$" ¬°¶}ºÝ¡A«á¥[ÅܼƦW©Ò²Õ¦¨ªº¡CÅܼƦWºÙ¬O¦³¤j¤p¼g¤§¤Àªº¡C + </simpara> + + <para> + PHP ªºÅܼƦWºÙ©M¨ä¥L¼ÐÅÒ¦³µÛ¬Û¦Pªº³W«h¡C¤@Ó¦³®ÄªºÅܼƬO¥Ñ^¤å¦r¥À©Î©³½u¶}©l¡A¸òµÛ¬O¥ô·Nªøµuªº¦r¥À¡B¼Æ¦r©Î©³½u¡C«ö¥¿³W¹Bºâ¦¡¡A¥¦¥i¥Hªí¹F¬°¡G'[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*' + </para> + + <note> + <simpara> + ¦r¥À¬° a-z¡AA-Z¡A¦Ó ASCII ¦r²Å«h±q 127 ¦Ü 255¡q0x7f-0xff¡r¡C + </simpara> + </note> + + <para> + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$var = "Bob"; +$Var = "Joe"; +echo "$var, $Var"; // outputs "Bob, Joe" + +$4site = 'not yet'; // invalid; starts with a number +$_4site = 'not yet'; // valid; starts with an underscore +$täyte = 'mansikka'; // valid; 'ä' is ASCII 228. +?> +]]> + </programlisting> + </informalexample> + </para> + + <para> + PHP 3 ¤¤¡AÅܼÆÁ`¬O¥ÑÈ«ü¬£¡C¤]´N¬O»¡¡A·í±z±N¤@Ó¹Bºâ¦¡ªºÈ«ü¬£µ¹¤@ÓÅܼƮɡA¾ãÓì©l¹Bºâ¦¡ªºÈ±N·|½Æ»s¨ì¥ØªºÅܼơC¨Ò¦p¡A·í±N¤@ÓÅܼƪºÈ«ü¬£µ¹¥t¤@ÓÅܼƤ§«á¡A§ó§ï·í¤¤ªº¥ô¦ó¤@ÓÅܼƪºÈ¨Ã¤£·|¼vÅT¨ì¥t¤@ÓÅܼƪºÈ¡C·Qnª¾¹D§ó¦h³oÃþªº«ü¬£¡A½Ð°Ñ¾\<link linkend="language.expressions">¹Bºâ¦¡</link>³o¤@³¹¡C + </para> + <para> + PHP 4 «h´£¨Ñ¤F¥t¤@ºØ«ü¬£ÅܼÆȪº¤èªk¡G<link linkend="language.references">¶Ç§}«ü¬£</link>¡A§Y·sÅܼƥu¬O°Ñ·Óì¨ÓÅܼƤ¤ªºÈ¡A©Î»¡·sªºÅܼƦ¨¬°ì¨ÓÅܼƪº§O¦W¡C¦¹®É¡A§ó§ï¨âÓÅܼƤ¤¥ô¦ó¤@ÓªºÈ³£·|¦P®É§ó§ï¥t¤@ÓªºÈ¡C¥Ñ©ó¨S¦³°õ¦æ¹ê»Úªº½Æ»s¤u§@¡A«ü¬£ªº¾Þ§@¤]¦]¦¹§ó¥[§Ö±¶¡C¤£¹L¡A¥u¦³¦bºò±Kªº°j°é©Î«ü¬£¤j¶qªº<link linkend="language.types.array">°}¦C</link>©Î<link linkend="language.types.object">ª«¥ó</link>®É¤~·|¹îı³t«×ªº´£¤É¡C + </para> + <para> + ¨Ï¥Î¶Ç§}«ü¬£¡A¥u¶·¦b³Q°Ñ·ÓªºìÅܼƫe¥[¤W¤@Ó (&) ªº²Å¸¹¡C¨Ò¦p¡A¤U¦Cµ{¦¡½X¦b¨Ï¥Î¶Ç§}«ü¬£«á¿é¥X 'My name is Bob' ¨â¦¸¡C + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$foo = 'Bob'; // Assign the value 'Bob' to $foo +$bar = &$foo; // Reference $foo via $bar. +$bar = "My name is $bar"; // Alter $bar... +echo $bar; +echo $foo; // $foo is altered too. +?> +]]> + </programlisting> + </informalexample> + </para> + + <para> + »Ýnª`·Nªº¬O¥u¦³¯u¥¿©R¦WªºÅܼƤ~¥i¥H¥Î¨Ó¶i¦æ¶Ç§}«ü¬£¡C + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$foo = 25; +$bar = &$foo; // This is a valid assignment. +$bar = &(24 * 7); // Invalid; references an unnamed expression. + +function test() +{ + return 25; +} + +$bar = &test(); // Invalid. +?> +]]> + </programlisting> + </informalexample> + </para> + </sect1> + + <sect1 id="language.variables.predefined"> + <title>¹w³]ªºÅܼÆ</title> + + <simpara> + PHP ¬°¥¦°õ¦æªºµ{¦¡´£¨Ñ¤F¤j¶qªº¹w³]ÅܼơCµM¦Ó¡A¥Ñ¤_¦³³\¦hÅܼƦ]¨Ì¿à¨ä©Ò°õ¦æªº¦øªA¾¹ºØÃþ¡Bª©¥»¡B¦w¸Ëµ¥±¡ªp¦Ó©w¡A¦]¦¹Ãø¥H¦³§¹¾ãªº³Q°O¸ü¤U¨Ó¡C§ó¦³¤@¨ÇÅܼƦb<link linkend="features.commandline">«ü¥O¦æ</link>ªº¼Ò¦¡¹B¦æ®É¬O¤£¯à¨Ï¥Îªº¡C¦³Ãö³o¨ÇÅܼƪº¦Cªí¡A½Ð°Ñ¦Ò<link linkend="reserved.variables">«O¯dªº¥ý«e©w¸qÅܼÆ</link>¤@¸`¡C + </simpara> + + <warning> + <simpara> + PHP 4.2.0 ¥H«áªºª©¥»¡A<link linkend="ini.register-globals">register_globals</link> «ü¥Oªº¹w³]ȬO <emphasis>off</emphasis>¡C³o¬O¤@Ó«¤jªº§ïÅÜ¡C±N register_globals ªºÈ¹w³]¬° <emphasis>off</emphasis> ·|¼vÅT¨ì¹w³]ÅܼƦb¥þ°ì½d³ò¤ºªº¦³®Ä©Ê¡C¨Ò¦p¡An±o¨ì <varname>DOCUMENT_ROOT</varname> ªºÈ¡AÀ³¨Ï¥Î <varname>$_SERVER['DOCUMENT_ROOT']</varname> ¦Ó¤£¬O <varname>$DOCUMENT_ROOT</varname>¡B¨Ï¥Î <varname>$_GET['id']</varname> ¥H¨ú±o URL <literal>http://www.example.com/test.php?id=3</literal> ¤¤ id ªºÈ¡A¦Ó¤£¬O¥Î <varname>$id</varname>¡B©Î¨Ï¥Î <varname>$_ENV['HOME']</varname> ¨Ó¨ú¥N <varname>$HOME</varname>¡C + </simpara> + <simpara> + §ó¦h»P¦¹§ó§ï¬ÛÃöªº¸ê®Æ¥i¦b <link linkend="ini.register-globals">register_globals</link> ªº³]¸m¤@¸`¡B<link linkend="security.registerglobals">¨Ï¥Î Register Globals</link> ¤¤ªº¦w¥þ³¹¡A©Î¦b <ulink url="&url.php.release4.1.0;">4.1.0</ulink> ¤Î <ulink url="&url.php.release4.2.0;">4.2.0</ulink> ªºµo¦æ³q§i¤¤¨ú±o¡C + </simpara> + <simpara> + §ÚÌ«Øij±z¨Ï¥Î PHP ´£¨Ñªº«O¯d¹w³]ÅܼơA¦p <link linkend="language.variables.superglobals">superglobal ³¯¦C</link>¡C + </simpara> + </warning> + + <simpara> + ¦Û 4.1.0 ª©¥»°_¡APHP ÃB¥~´£¨Ñ¤F¤@®M¹w³]°}¦C¡A·í¤¤¥]§t¤F¨Ó¦Û¦øªA¾¹¡q¦p¾A¥Î¡r¡BÀô¹Ò¡B¤Î¨Ï¥ÎªÌ¿é¤JªºÅܼơC³o¨Ç·s³¯¦C¤ñ¸û¯S§O¡A¦]¦¹¥¦Ì·|¦Û°Ê¦a³]¬°¥þ°ì¡A§Y¥i¥H¦b©Ò¦³½d³ò¤º¨Ï¥Î¡C¥¿¦]¦p¦¹¡A¥¦Ì¤]³QºÙ¬° 'autoglobals' ©Î 'superglobals'¡C¡qPHP ©|¥¼¦³¨Ï¥ÎªÌ¦Û¦æ©w¸q superglobals ªº¥\¯à¡C¡r§Ú̱N¦b¤U±¦C¥X superglobals¡A¦ýnª¾¹D¥¦Ìªº¤º®e©M PHP ¹w³]Åܼƪº²`¤J°Q½×¡A½Ð°Ñ¦Ò<link linkend="reserved.variables">«O¯dªº¥ý«e©w¸qÅܼÆ</link>¤@¸`¡C¦¹¥~¡A±z¤]·|¯d·N¦³ªº¹w³]ÅÜ¼Æ (<varname>$HTTP_*_VARS</varname>) ¤´µM¦s¦b¡C + + &avail.register-long-arrays; + </simpara> + + <note> + <title>¥iÅÜÅܼÆ</title> + <para> + Superglobals ¤£¯à·í§@<link linkend="language.variables.variable">¥iÅÜÅܼÆ</link>¨Ó¨Ï¥Î¡C + </para> + </note> + + <para> + ¦pªG¬Y¨Ç <link linkend="ini.variables-order">variables_order</link> ¤¤ªºÅܼƨS¦³³Q³]©w¡A¥¦Ì¬Û¹ïªº PHP ¹w³]³¯¦C¤]±N·|¬OªÅªº¡C + </para> + + <variablelist id="language.variables.superglobals"> + <title>PHP ªº Superglobals</title> + <varlistentry> + <term><link linkend="reserved.variables.globals">$GLOBALS</link></term> + <listitem> + <simpara> + ¥]§t¤@Ó«ü¦Vµ{¦¡¥þ°ì½d³ò¤º¥i¥ÎÅܼƪº¯Á¤Þ¡C¦¹³¯¦Cªº¯Á¤ÞÁ䬰¥þ°ìÅܼƪº¦WºÙ¡C<varname>$GLOBALS</varname> ¦Û PHP 3 ¶}©l´N¤w¦s¦b¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.server">$_SERVER</link></term> + <listitem> + <simpara> + ¥Ñºô¶¦øªA¾¹³]©wªºÅܼƩΥثeªºµ{¦¡©Ò°õ¦æªºÀô¹Ò²£¥ÍªºÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_SERVER_VARS</varname> ³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.get">$_GET</link></term> + <listitem> + <simpara> + ³q¹L HTTP GET ´£¨Ñµ¹µ{¦¡ªºÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_GET_VARS</varname> ³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.post">$_POST</link></term> + <listitem> + <simpara> + ³q¹L HTTP POST ´£¨Ñµ¹µ{¦¡ªºÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_POST_VARS</varname>³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.cookies">$_COOKIE</link></term> + <listitem> + <simpara> + ³q¹L HTTP cookies ´£¨Ñµ¹µ{¦¡ªºÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_COOKIE_VARS</varname>³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.files">$_FILES</link></term> + <listitem> + <simpara> + ³q¹L HTTP POST ÀɮפW¶Ç´£¨Ñµ¹µ{¦¡ªºÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_POST_FILES</varname>³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C¸Ô±¡½Ð°Ñ¾\ <link linkend="features.file-upload.post-method">POST ¤W¶Ç¤è¦¡</link>¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.environment">$_ENV</link></term> + <listitem> + <simpara> + °õ¦æÀô¹Ò´£¨Ñµ¹µ{¦¡ªºÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_ENV_VARS</varname>³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C + </simpara> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.request">$_REQUEST</link></term> + <listitem> + <simpara> + ³q¹L¥ô¦ó¨Ï¥ÎªÌ¿é¤J³~®|¦Ó´£¨Ñµ¹µ{¦¡ªºÅܼơA¤]¥¿¦]¦p¦¹¤£È±o«H¥ô¡C¦¹³¯¦C¤¤Åܼƪº¦s¦b»P§_¤Î¦¸§Ç¬O¨M©w©ó <link linkend="ini.variables-order">variables_order</link> ªº³]©w¡CPHP 4.1.0 ¤§«eªºª©¥»¨Ã¨S¦³Ãþ¦ü¦¹³¯¦CªºÅܼơC½Ð¦P®É°Ñ¾\ <function>import_request_variables</function>¡C + </simpara> + <note> + <simpara> + ¦b<link linkend="features.commandline">«ü¥O¦æ</link>¼Ò¦¡¤U°õ¦æ®É¡A¥¦¨Ã<emphasis>¤£</emphasis>¥]§t <varname>argv</varname> ©M <varname>argc</varname> ¶µ¥Ø¡C¦¹¨â¶µ¥Ø¥u¦b <varname>$_SERVER</varname> ³¯¦C¤¤¥X²{¡C + </simpara> + </note> + </listitem> + </varlistentry> + <varlistentry> + <term><link linkend="reserved.variables.session">$_SESSION</link></term> + <listitem> + <simpara> + ¥Ø«e©Mµ{¦¡ª`¥U¤Fªº session ÅܼơC¨ä©Ê½èÃþ¦ü¦³ªº <varname>$HTTP_SESSION_VARS</varname>³¯¦C¡AÁöµM¥Ø«eÁÙ¥i¥H¨Ï¥Î¡A¦ý¤£³Q«Øij¡C¸Ô±¡½Ð°Ñ¾\ <link linkend="ref.session">Session ³B²z¨ç¼Æ</link>¤@¸`¡C + </simpara> + </listitem> + </varlistentry> + </variablelist> + + </sect1> + + + <sect1 id="language.variables.scope"> + <title>Åܼƽd³ò</title> + + <simpara> + Åܼƪº½d³ò¥u¬O¦b¨ä©Ò©w¸qªºªÅ¶¡¤º¦s¦b¡C¦b¤j³¡¥÷ªº±¡ªp¤U¡APHP ªºÅܼƥu¦³¤@Ó³æ¤@ªº½d³ò¡C³o³æ¤@ªº½d³ò¤]¥]§t¤F¥H include ©M require ¤è¦¡¤Þ¤JªºÀɮסC¨Ò¦p¡G + </simpara> + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$a = 1; +include "b.inc"; +?> +]]> + </programlisting> + </informalexample> + <simpara> + ¨Ò¤l¤¤¡AÅÜ¼Æ <varname>$a</varname> ¤]¦s¦b¤_³Q¥]§t¤Jªºµ{¦¡ <filename>b.inc</filename> ¤¤¡C¦ý¬O¦b¨Ï¥ÎªÌ¦Ûqªº¨ç¼Æ¤¤¡A¤@Ó°Ï°ì©Êªº¨ç¼Æ½d³ò±N³Q¤Þ¥Î¡C¥ô¦ó¦b¨ç¼Æ¤º¨Ï¥ÎªºÅܼƦb¹w³]ªº±¡ªp¤U¥u§½©ó¸Ó¨ç¼Æªº½d³ò¤º¡C¨Ò¦p¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$a = 1; /* global scope */ + +function Test() +{ + echo $a; /* reference to local scope variable */ +} + +Test(); +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ³oÓµ{¦¡¤£·|¿é¥X¥ô¦óªF¦è¡A¦]¬° echo z¥y¨Ï¥Î¤F¥»°Ï°ìª©¥»ªº <varname>$a</varname> ÅܼơA¦Ó¸Ó¥»°Ï°ìÅܼƨå¼´¿³Q¤À°t¤@ÓÈ¡C§A·|µo²{³o©M C »y¨¥ªº°µªk¤£¦P¡A¦]¬° C ªº¥þ°ìÅܼƬO¦Û°Êªº´£¨Ñµ¹¦U¨ç¼Æ¡A°£«D¦b¥»°ì©w¸q¤¤«ü©úºM¾P¡C¦¹°µªk¥i¯à·|¤ÞP¤@¨Ç°ÝÃD¡A¦p¨Ï¥ÎªÌ¤£·V¦a§ó§ï¤F¥þ°ìÅܼƪºÈ¡C¦b PHP ¤¤¡A¥þ°ìÅܼƦb¥»°ì¨Ï¥Î«e¥²¶·¥ý«Å§G¬°¥þ°ì¡C¨Ò¤l¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$a = 1; +$b = 2; + +function Sum() +{ + global $a, $b; + + $b = $a + $b; +} + +Sum(); +echo $b; +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ¤Wz¨Ò¤l±N·|¿é¥X "3"¡C¦b¨ç¼Æ¤º«Å§G <varname>$a</varname> ¤Î <varname>$b</varname> ¬°¥þ°ì«á¡A©Ò¦³¯A¤Î¸Ó¨âÓÅܼƪº¨Ï¥Î±N¦Û°Ê«ü¦V¥þ°ìªºª©¥»¡CPHP ¨S¦³©w¤@Ó¨ç¼Æ¥i¥H¨Ï¥Îªº¥þ°ìÅܼƪº¼Æ¶q¡C + </simpara> + + <simpara> + ²Ä¤GºØ¦s¨ú¥þ°ì½d³ò¤¤ªºÅܼƤèªk¬O¨Ï¥Î¤@ PHP ¯S§O©w¸qªº³¯¦C¡G<varname>$GLOBALS</varname>¡C«e±ªº¨Ò¤l¥i¥H«¼g¬°¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$a = 1; +$b = 2; + +function Sum() +{ + $GLOBALS["b"] = $GLOBALS["a"] + $GLOBALS["b"]; +} + +Sum(); +echo $b; +?> +]]> + </programlisting> + </informalexample> + + <simpara> + <varname>$GLOBALS</varname> ¬O¤@ÓÃöÁp³¯¦C (associative array)¡A¥þ°ìÅܼƪº¦W§Y¬°¯Á¤ÞÁä¡A¦Ó¸ÓÅܼƪº¤º®e§Y¬°³¯¦CªºÈ¡C¦³§_¯d·N¨ì <varname>$GLOBALS</varname> ¦b¥ô¦ó¤@Ó½d³ò³£¥X²{¡H¨º¬O¦]¬° $GLOBALS ¬O¤@Ó<link linkend="language.variables.superglobals">superglobal</link>¡C³o¬O¤@ӥܽd superglobals ±j¤j¥\¯àªº¨Ò¤l¡G + </simpara> + <para> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +function test_global() +{ + // Most predefined variables aren't "super" and require + // 'global' to be available to the functions local scope. + global $HTTP_POST_VARS; + + print $HTTP_POST_VARS['name']; + + // Superglobals are available in any scope and do + // not require 'global'. Superglobals are available + // as of PHP 4.1.0 + print $_POST['name']; +} +?> +]]> + </programlisting> + </informalexample> + </para> + + <simpara> + Åܼƽd³òªº¥t¤@Ó«n¥\¯à¬°<emphasis>ÀRºA</emphasis>ÅܼơCÀRºAÅܼƥu¦b¥»°ì¨ç¼Æ½d³ò¤º¦s¦b¡A¦ý¬O·íµ{¦¡°õ¦æÂ÷¶}¦¹½d³ò®É¡A¥¦¨Ã¤£·|³à¥¢¥¦ªºÈ¡C¬Ý¬Ý¤U±ªº¨Ò¤l¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +function Test () +{ + $a = 0; + echo $a; + $a++; +} +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ¦¹¨ç¼Æ¨S¦³¤°»ò¥Î³B¡A¦]¨C¤@¦¸°õ¦æ¥¦®É¡A¥¦±N <varname>$a</varname> ³]¬° <literal>0</literal> µM«á¦C¦L¥X "0"¡C<varname>$a</varname>++ ¼W¥[¤F <varname>$a</varname> ªºÈ¡A¦ý¨Ã¨S¦³¹ê»Ú¥Î³~¦]¬°¤@¥¹Â÷¶}¤F¸Ó¨ç¼Æ¡AÅÜ¼Æ <varname>$a</varname> ¤]ÀH¤§®ø¥¢¡Cn³]p¤@Ó¦³¥Îªº¡B¤£·|¥á¥¢·í«ep¼Æªºp¼Æ¨ç¼Æ¡A§ÚÌ¥i¥H±N <varname>$a</varname>«Å§G¬°ÀRºA¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +function Test() +{ + static $a = 0; + echo $a; + $a++; +} +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ²{¦b¡A¨C·í¨ç¼Æ Test() ³Q©I¥s®É¡A¥¦·|¦C¦L¥X <varname>$a</varname> ªºÈ¡AµM«á¥[¤W¤@¡C + </simpara> + + <simpara> + ÀRºAÅܼƤ]´£¨Ñ¤@ºØ³B²z»¼°j¨ç¼Æªº¤èªk¡C»¼°j¨ç¼Æ¬O¤@ºØ©I¥s¦Û¤vªº¨ç¼Æ¡C½s¼g»¼°j¨ç¼Æ®É¥²¶·¯d·N¡A¦]¬°Y½s¼g¿ù»~¡A¥¦¦³¥i¯à·|µL©w¦a»¼°j¡C±z¥²¶·½T©w¨¬°÷ªº¤è¦¡¨Ó²×¤î»¼°j¡C¤U¦C²³æªº¨ç¼Æ±N»¼°j¦a¼Æ¨ì 10¡A§Q¥ÎÀRºAÅÜ¼Æ <varname>$count</varname> ¨ÓÂ_©w¤°»ò®ÉÔ°±¤î¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +function Test() +{ + static $count = 0; + + $count++; + echo $count; + if ($count < 10) { + Test (); + } + $count--; +} +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ÅX°Ê <literal>PHP 4</literal> ªº Zend Engine 1 ¬O¥H°Ñ·Óªº¤è¦¡¨Ó¹ê²{ <literal>static</literal> ©M <literal>global</literal> ªº¡C¨Ò¦p¡A¤@Ó¯u¥¿ªº¥þ°ìÅܼƨϥΠ<literal>global</literal> ¤è¦¡¤Þ¶i¤@Ó¨ç¼Æ½d³ò®É¹ê»Ú¤W´N¬O«Ø¥ß¤F¤@Ó¥þ°ìÅܼƪº°Ñ·Ó¡C³o±N¾ÉP¤@¨Ç·N·Q¤£¨ìªº¦æ¬°¡A¥¿¦p¤U¦C¨Ò¤l©Òz¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +function test_global_ref() { + global $obj; + $obj = &new stdclass; +} + +function test_global_noref() { + global $obj; + $obj = new stdclass; +} + +test_global_ref(); +var_dump($obj); +test_global_noref(); +var_dump($obj); +?> +]]> + </programlisting> + </informalexample> + + <simpara> + °õ¦æ³oÓ¨Ò¤l±N·|¾ÉP¤U¦Cªº¿é¥X¡G + </simpara> + + <screen> +NULL +object(stdClass)(0) { +} + </screen> + + <simpara> + <literal>static</literal> ³¯z¦¡¤]·|¾ÉP¦P¼Ëªº¿é¥X¡C°Ñ·Ó¨Ã¨S¦³³QÀRºA¦aÀx¦s¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +function &get_instance_ref() { + static $obj; + + echo "Static object: "; + var_dump($obj); + if (!isset($obj)) { + // Assign a reference to the static variable + $obj = &new stdclass; + } + $obj->property++; + return $obj; +} + +function &get_instance_noref() { + static $obj; + + echo "Static object: "; + var_dump($obj); + if (!isset($obj)) { + // Assign the object to the static variable + $obj = new stdclass; + } + $obj->property++; + return $obj; +} + +$obj1 = get_instance_ref(); +$still_obj1 = get_instance_ref(); +echo "\n"; +$obj2 = get_instance_noref(); +$still_obj2 = get_instance_noref(); +?> +]]> + </programlisting> + </informalexample> + + <simpara> + °õ¦æ¦¹¨Ò¤l±N¾ÉP¤U¦Cªº¿é¥X¡G + </simpara> + + <screen> +Static object: NULL +Static object: NULL + +Static object: NULL +Static object: object(stdClass)(1) { + ["property"]=> + int(1) +} + </screen> + + <simpara> + ¤Wz¨Ò¤l¥Ü½d¤F¦b«ü¬£¤@Ó°Ñ·Óµ¹¤©¤@ÓÀRºAÅܼƫá¡A·í±z²Ä¤G¦¸©I¥s <literal>&get_instance_ref()</literal> ¨ç¼Æ®É¡A¥¦¬O<emphasis>¤£·|</emphasis>°O¦í¤§«eªºÈªº¡C + </simpara> + + + </sect1> + + <sect1 id="language.variables.variable"> + <title>¥iÅÜÅܼÆ</title> + + <simpara> + ¦³®ÉÔ¡A¥i¥H¨Ï¥Î¥iÅÜÅܼƷ|¥O¨ì¤u§@§ó¥[¤è«K¡C¤]´N¬O´N¡A¤@ÓÅܼƪº¦W¥i¥H³Q°ÊºAªº³]©w©M¨Ï¥Î¡C¤@Ó´¶³qªºÅܼƬO¥H¤U¦Cªº¤èªk³]©w¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$a = "hello"; +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ¤@Ó¥iÅÜÅܼƬO¥H¥t¤@ÓÅܼƪºÈ§@¬°¥¦ªºÅܼƦW¡C¦b¤Wz¨Ò¤l¤¤¡A¥un¥[¨âÓ $ ¦b <emphasis>hello</emphasis> ªº«e±´N¥i§â¥¦·í§@¬O¤@ÓÅܼƪº¦W¨Ó¨Ï¥Î¤F¡C§Y¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +$$a = "world"; +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ³o®É¡A¦³¨âÓÅܼƳQ©w¸qµM«áÀx¦s¦b PHP ªº²Å¸¹ªí¤¤¡G§t¦³ "hello" ªº <varname>$a</varname> ¤Î§t¦³ "world" ªº <varname>$hello</varname>¡C©Ò¥H¡A¦¹±Ôz¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +echo "$a ${$a}"; +?> +]]> + </programlisting> + </informalexample> + + <simpara> + »P¤U¦C³o¥y¦³µÛ¦P¼Ëªº¿é¥X¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php +echo "$a $hello"; +?> +]]> + </programlisting> + </informalexample> + + <simpara> + §Y¡A¥¦Ì³£¿é¥X¡G<computeroutput>hello world</computeroutput>¡C + </simpara> + + <simpara> + ¬°¤Fn¦b³¯¦C¤¤¨Ï¥Î¥iÅÜÅܼơA±z¥²¶·º¥ý¸Ñ¨M¤@Ó¼Ò½kªº°ÝÃD¡C¤ñ¤è»¡¡A¦pªG±z¨Ï¥Î <varname>$$a[1]</varname>¡A¨ºåªR¾¹¥²¶·ª¾¹D±z¬O·Q·í <varname>$a[1]</varname> ¬OÅܼƨӨϥΡAÁÙ¬O·í <varname>$$a</varname> ¬OÅܼơAµM«á«ü¦V¨ºÓÅܼƪº²Ä [1] Ó¯Á¤Þ¡C¸Ñ¨M¤Wz¼Ò½k°ÝÃDªº»yªk¬O¡G²Ä¤@Ó±¡ªp¨Ï¥Î <varname>${$a[1]}</varname>¡B²Ä¤GÓ±¡ªp¨Ï¥Î <varname>${$a}[1]</varname>¡C + </simpara> + + <warning> + <simpara> + ¥²¶·¯d·Nªº¬O¡A¥iÅÜÅܼƬO¤£¯à¨Ï¥Î©ó PHP ªº <link linkend="language.variables.superglobals">Superglobal ³¯¦C</link>¡C³oªí¥Ü±z¤£¯à¨Ï¥Î <varname>${$_GET}</varname> ³o¼Ëªº±Ôz¡C¦pªG±z¯uªº·Q¨Ï¥Î superglobals ©Mªº <varname>HTTP_*_VARS</varname>¡A±z¥i¥H¹Á¸Õ¥H<link linkend="language.references">°Ñ·Ó</link>ªº¤è¦¡¨Ï¥Î¡C + </simpara> + </warning> + + </sect1> + + <sect1 id="language.variables.external"> + <title>¨Ó¦Û PHP ¥H¥~ªºÅܼÆ</title> + + <sect2 id="language.variables.external.form"> + <title>HTML ªí³æ (GET ©MPOST)</title> + + <simpara> + ·í¤@¥÷ªí³æ¶Ç°eµ¹ PHP µ{¦¡®É¡Aªí³æ¤ºªº¸ê°T±N¦Û°Ê´£¨Ñµ¹¸Óµ{¦¡¡C§Ú̦³«Ü¦h¤èªk¦s¨ú³o¨Ç¸ê°T¡A½d¨Ò¡G + </simpara> + + <para> + <example> + <title>¤@Ó²³æªº HTML ªí³æ</title> + <programlisting role="html"> +<![CDATA[ +<form action="foo.php" method="post"> + Name: <input type="text" name="username"><br> + Email: <input type="text" name="email"><br> + <input type="submit" name="submit" value="Submit me!"> +</form> +]]> + </programlisting> + </example> + </para> + + <para> + ®Ú¾Ú±zªº¦w¸Ë¤è¦¡©MÓ¤H°¾¦n¡APHP ´£¨Ñ¦hºØ¤è¦¡¦s¨ú HTML ªí³æ¤¤ªº¸ê®Æ¡C¤@¨Ç¨Ò¤l¦p¡G + </para> + + <para> + <example> + <title>¦s¨ú¤@Ó¥H POST ¤è¦¡¶Ç°eªºÂ²³æ HTML ªí³æ</title> + <programlisting role="html"> +<![CDATA[ +<?php +// Available since PHP 4.1.0 + + print $_POST['username']; + print $_REQUEST['username']; + + import_request_variables('p', 'p_'); + print $p_username; + +// Available since PHP 3. As of PHP 5.0.0, these long predefined +// variables can be disabled with the register_long_arrays directive. + + print $HTTP_POST_VARS['username']; + +// Available if the PHP directive register_globals = on. As of +// PHP 4.2.0 the default value of register_globals = off. +// Using/relying on this method is not preferred. + + print $username; +?> +]]> + </programlisting> + </example> + </para> + <para> + ¨Ï¥Î GET ¤è¦¡¶Ç°eªºªí³æ¥ÎªkÃþ¦ü¡A¥u¤£¹L¨Ï¥Î¦X¾Aªº¥ý«e©w¸qªº¨ç¼Æ¡CGET ¤]¥i¨Ï¥Î¦b¬d¸ß¦r¦ê (QUERY_STRING) ¡qURL ¤¤°Ý¸¹ '?' «á±ªº¸ê°T¡r¡C¨Ò¦p¡A<literal>http://www.example.com/test.php?id=3</literal> §t¦³¥H <varname>$_GET['id']</varname> ¤è¦¡¦s¨úªº GET ¸ê®Æ¡C½Ð°Ñ¦Ò <link linkend="reserved.variables.request">$_REQUEST</link> ©M <function>import_request_variables()</function>¡C + </para> + + <note> + <para> + <link linkend="language.variables.superglobals">Superglobal ³¯¦C</link>¦p <varname>$_POST</varname> ¤Î <varname>$_GET</varname> ¦b PHP ª©¥» 4.1.0 ¥H¤W¤~¶}©l´£¨Ñ¡C + </para> + </note> + + <para> + ¤W±´£¨ì¡A¦b PHP 4.2.0 ¤§«eªºª©¥»¤¤¡A<link linkend="ini.register-globals">register_globals</link> ªº¹w³]ȬO <emphasis>on</emphasis>¡C¦Ó¦b PHP 3 ¤¤¡A¥¦¥Ã»·¬O on ªº¡C§ÚÌ«Øij©Ò¦³¨Ï¥ÎªÌ¤£n¨Ì¿à¦¹«ü¥O¡A¨Ã¦b½s¼g®É±N¥¦·í§@¬O <emphasis>off</emphasis> ¨Ó³]p±zªºµ{¦¡¡C + </para> + + <note> + <para> + <link linkend="ini.magic-quotes-gpc">magic_quotes_gpc</link> ²ÕºA«ü¥O·|¼vÅT¨ì Get¡APost ©M Cookie ªºÈ¡C¦pªG¶}±Ò¦¹«ü¥O¡A(It's "PHP!") ªºÈ±NÅܦ¨ (It\'s \"PHP!\")¡C¦¹¸õ¥X¤u§@¦b±N¦r¦ê´¡¤J¸ê®Æ®w«e¬O¥²¶·n°µªº¡C½Ð°Ñ¦Ò <function>addslashes</function>¡A<function>stripslashes</function> ©M <link linkend="ini.magic-quotes-sybase">magic_quotes_sybase</link>¡C + </para> + </note> + + <simpara> + PHP ¤]À´±o³B²z³¯¦C¦¡ªºªí³æÅܼơq½Ð°ÑÆ[¬ÛÃöªº <link linkend="faq.html">FAQ</link>¡r¡C±z¥i¥H±N¬ÛÃöªºÅܼÆÂkÃþ¡A©Î¥Î¦¹¥\¯à¨Ó¨ú¦^¦h¤¸¿ï¾Ü¿é¤Jªí³æªºÈ¡C¦b¤U¦C½d¨Ò¤¤¡A§Ú̱Nªí³æ±i¶K¨ì¥¦¦Û¤v¡A¨Ã¦b¶Ç°e«á§â¸ê®ÆÅã¥Ü¥X¨Ó¡G + + </simpara> + + <para> + <example> + <title>§ó½ÆÂøªºªí³æÅܼÆ</title> + <programlisting role="php"> +<![CDATA[ +<?php +if ($HTTP_POST_VARS['action'] == 'submitted') { + print '<pre>'; + + print_r($HTTP_POST_VARS); + print '<a href="'. $HTTP_SERVER_VARS['PHP_SELF'] .'">Please try again</a>'; + + print '</pre>'; +} else { +?> +<form action="<?php echo $HTTP_SERVER_VARS['PHP_SELF']; ?>" method="post"> + Name: <input type="text" name="personal[name]"><br> + Email: <input type="text" name="personal[email]"><br> + Beer: <br> + <select multiple name="beer[]"> + <option value="warthog">Warthog</option> + <option value="guinness">Guinness</option> + <option value="stuttgarter">Stuttgarter Schwabenbräu</option> + </select><br> + <input type="hidden" name="action" value="submitted"> + <input type="submit" name="submit" value="submit me!"> +</form> +<?php +} +?> +]]> + </programlisting> + </example> + </para> + + <para> + PHP 3 ªº³¯¦Cªí³æÅܼƥu¥i¥H¨Ï¥Î¤@ºû³¯¦C¡A¦Ó PHP 4 «h¨S¦³¦¹¨î¡C + </para> + + <sect3 id="language.variables.external.form.submit"> + <title>IMAGE SUBMIT ÅܼƦWºÙ</title> + + <simpara> + ¦b¶Ç°eªí³æ®É¡A§ÚÌ¥i¥H¨Ï¥Î¤U¦C¼ÐÅÒ±N¼Ð·Çªº´£¥æÁä¥H¹Ï¹³¨Ó¨ú¥N¡G + </simpara> + + <informalexample> + <programlisting role="html"> +<![CDATA[ +<input type="image" src="image.gif" name="sub"> +]]> + </programlisting> + </informalexample> + + <simpara> + ·í¨Ï¥ÎªÌ¦b¹Ï¹³ªº¥ô¦ó¤@³B«ö¤@¤U¡A¦ñÀHªºªí³æ´N·|¶Ç°e¨ì¦øªA¾¹¡AÀH¨ä¦Ó¨ÓÁÙªþ¥[¤F¨âÓÅܼơAsub_x ©M sub_y¡C³o¥]§t¤F¨Ï¥ÎªÌ«ö¦b¹Ï¹³ªº®y¼Ð¡C¦³¸gÅ窺¨Ï¥ÎªÌ©Î³\ª¾¹D¥ÑÂsÄý¾¹¶Ç°e¨ÓªºÅܼƦWºÙÀ³¸Ó¥]§t¥y¸¹¡A¦Ó¤£¬O©³½u¡A¦ý PHP ¦Û°Ê¦a±N¥y¸¹Âà´«¦¨¬°©³½u¡C + </simpara> + </sect3> + + </sect2> + + <sect2 id="language.variables.external.cookies"> + <title>HTTP Cookies</title> + + <simpara> + PHP µ´¹ï¤ä´© <ulink + url="&spec.cookies;">Netscape³W®æ</ulink>ªº HTTP cookies¡CCookies ¬O¥Î¨Ó±N¸ê®ÆÀx¦s¦b¥Î¤áºÝªºÂsÄý¾¹¤¤¡A¥H«K¤é«á°lÂÜ©ÎÃѧOªð¦^ªº¨Ï¥ÎªÌ¡C±z¥i¥H¥Î <function>setcookie()</function> ¨ç¼Æ¨Ó³]©w cookies¡CCookies ¬O HTTP header ªº¤@³¡¥÷¡A¦]¦¹ SetCookie ¨ç¼Æ¤@©wn¦b¥ô¦ó¸ê®Æ¶Ç°e¥hÂsÄý¾¹«e©I¥s¡C³o©M <function>header()</function> ¨ç¼Æ¦³µÛ¬Û¦Pªº©w¡CCookie ¸ê®Æ¥i¥H¦b <varname>$_COOKIE</varname>¡A<varname>$HTTP_COOKIE_VARS</varname> ¤Î <varname>$_REQUEST</varname> ³¯¦C¤¤¨Ñ¨Ï¥Î¡C¸Ô±¡©M½d¨Ò½Ð°Ñ¦Ò¤â¥Uªº <function>setcookie()</function> ³¡¥÷¡C + </simpara> + + <simpara> + Y±zn±N¦hÓÈ«ü¬£µ¹¤@Ó cookie ÅܼơA¨º±z´Nn¨Ï¥Î³¯¦C¨Ó«ü¬£¤F¡C½d¨Ò¡G + </simpara> + + <informalexample> + <programlisting role="php"> +<![CDATA[ +<?php + setcookie("MyCookie[foo]", "Testing 1", time()+3600); + setcookie("MyCookie[bar]", "Testing 2", time()+3600); +?> +]]> + </programlisting> + </informalexample> + + <simpara> + ³o±N·|«Ø¥ß¨âÓÓ§Oªº cookies¡A¾¨ºÞ²{¦b MyCookie¦b±zªºµ{¦¡¤¤¬O¤@ӳ椸³¯¦C¡C¦pªG±zn¥H¤@Ó cookie «Ø¥ß¦hÓÈ¡A¨º±z¥i¥ý¹ï¨º¨ÇȨϥΠ<function>serialize()</function> ©Î <function>explode()</function> ¨ç¼Æ¡C + </simpara> + + <simpara> + ¦³¤@ÂI¥²¶·¯d·Nªº¬O¡A¤@Ó cookie ±N·|´À¥NÂsÄý¾¹¤¤¥t¤@Ó¦P¦Wªº cookie¡A°£«D¸Ó cookie ªº¸ô®|©Îºô°ì¦WºÙ¤£¦P¡C©Ò¥H¡A¦b³]pÁʪ«¨®µ{¦¡®É¡A±z³Ì¦n«O«ù¤@Óp¼Æ¾¹¡A¨Ã±N¦¹¼Æ¾Ú¶Ç»¼¤U¥h¡A§Y¡G + </simpara> + + <example> + <title>¤@Ó <function>setcookie()</function> ªº½d¨Ò</title> + <programlisting role="php"> +<![CDATA[ +<?php +$count++; +setcookie("count", $count, time()+3600); +setcookie("Cart[$count]", $item, time()+3600); +?> +]]> + </programlisting> + </example> + + </sect2> + + <sect2 id="language.variables.external.dot-in-names"> + <title>¦bÅܼƦW¦r¤¤ªº¥y¸¹ (dots)</title> + + <para> + ¤@¯ë¤W¡APHP ¨Ã¤£·|§ó§ï¶Ç¤Jµ{¦¡ªºÅܼƦWºÙ¡CµM¦Ó¡A±z¥²¶·¯d·N¥y¸¹ (.) ¨Ã¤£¬O¤@Ó¦³®Äªº PHP ÅܼƦWºÙ¦r¤¸¡A¥¿¦p¡G + + <programlisting role="php"> +<![CDATA[ +<?php +$varname.ext; /* invalid variable name */ +?> +]]> + </programlisting> + ³o®É¡AåªR¾¹¨£¨ìªº¥u¬O¤@Ó¥s°µ <varname>$varname</varname> ªºÅܼơA¸òÀHµÛ¦r¦ê³sµ²¹Bºâ¤l (.)¡A¦A¨Ó¬O¤@ÓµL¤Þ¸¹ªº¦r¦ê¡Gext¡CÅãµM¦a¡A³o¨Ã¤£·|±a¨Ó±z·Qnªºµ²ªG¡C + </para> + + <para> + ¥¿¦]¦p¦¹¡APHP ·|¦Û°Êªº±N¶Ç¤JªºÅܼƦWºÙ¤¤ªº¥y¸¹ (.) §ï¬°©³½u (_)¡C + </para> + + </sect2> + + <sect2 id="language.variables.determining-type-of"> + <title>§P©wÅܼƪºÃþ«¬</title> + + <para> + ¥Ñ©ó PHP ·|¦Û¦æ§PÂ_ÅܼƪºÃþ«¬¡A¨Ã«ö»ÝnÂàÅÜ¥¦ÌªºÃþ«¬¡A¦]¦¹¦³®É¤]Ãø¥H©úÅã¦a§P©w¤@ÓÅܼƦb¬YӮɨ誺Ãþ«¬¡C¦³Å²©ó¦¹¡APHP ´£¨Ñ¤F´XÓ§P©wÅܼÆÃþ«¬ªº¨ç¼Æ¡G<function>gettype()</function>¡B<function>is_array()</function>¡B<function>is_float()</function>¡B<function>is_int()</function>¡B<function>is_object()</function> ¤Î <function>is_string()</function>¡C½Ð°Ñ¾\<link linkend="language.types">Ãþ«¬</link>¤@³¹¡C + </para> + </sect2> + + </sect1> + + </chapter> + +<!-- Keep this comment at the end of the file +Local variables: +mode: sgml +sgml-omittag:t +sgml-shorttag:t +sgml-minimize-attributes:nil +sgml-always-quote-attributes:t +sgml-indent-step:1 +sgml-indent-data:t +indent-tabs-mode:nil +sgml-parent-document:nil +sgml-default-dtd-file:"../../manual.ced" +sgml-exposed-tags:nil +sgml-local-catalogs:nil +sgml-local-ecat-files:nil +End: +vim600: syn=xml fen fdm=syntax fdl=2 si +vim: et tw=78 syn=sgml +vi: ts=1 sw=1 +-->