PHP Knowledge Base Update -- July 4th, 1999

Adrian Teasdale today suggested the idea of PHP user groups.

  "I have come to PHP from Cold Fusion where users have setup their own 
   groups and I have found this very useful for bouncing ideas, meeting 
   people with the same/similar vision and it's also another excuse to 
   meet up with a bunch of people and have a drink."

Drop him a line at [email protected] if you are in the UK and
interested in starting a group...

Happy 4th July from Down Under to all the Yanks on the list. <g>

Cheers,

Nathan


------------------------------------------------------------
How much memory do I need to compile PHP?
Why do I get a "virtual memory exhausted" error in bison when compiling?
http://e-gineer.com/e-gineer/phpkb/view.phtml/qid/380
------------------------------------------------------------
mike dombrowski, Rasmus Lerdorf

Compiling PHP requires a reasonable amount of memory.

Here is an example error message from a machine with only 8MB of RAM and
8MB of swap memory.

    ha:/tmp/php-3.0.11# make
    gcc -g -O2 -O2 -fpic  -I. -I. -I/usr/local/apache/include
    -I/tmp/include    -c language-parser.tab.c -o language-parser.tab.o
    /usr/lib/bison.simple: In function `phpparse':
    /usr/lib/bison.simple:692: virtual memory exhausted
    make: *** [language-parser.tab.o] Error 1
    ha:/tmp/php-3.0.11# 

If you are having memory problems when compiling you may like to try
installing pre-compiled PHP binaries.


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How can I get the MX records for a domain from inside PHP?
How can I get DNS records for a domain or IP from inside PHP?
Can I get the IP address for a known host in PHP?
http://e-gineer.com/e-gineer/phpkb/view.phtml/qid/382
------------------------------------------------------------
Stephen Benjamin

Network Functions:
    http://www.php.net/manual/ref.network.php3

gethostbyaddr - Get the Internet host name corresponding to
a given IP address:
    http://www.php.net/manual/function.gethostbyaddr.php3

gethostbyname - Get the IP address corresponding to a given Internet
host name:
    http://www.php.net/manual/function.gethostbyname.php3

gethostbynamel - Get a list of IP addresses corresponding to a given
Internet host name:
    http://www.php.net/manual/function.gethostbynamel.php3

checkdnsrr - Check DNS records corresponding to a given Internet
host name or IP address:
    http://www.php.net/manualfunction.checkdnsrr.php3

getmxrr - Get MX records corresponding to a given Internet
host name:
    http://www.php.net/manual/function.getmxrr.php3


------------------------------------------------------------
How many times can or should I call pconnect?
http://e-gineer.com/e-gineer/phpkb/view.phtml/qid/385
------------------------------------------------------------
Rasmus Lerdorf

You can have as many *_pconnect() calls as you want.  If PHP sees you
are trying to connect to the database with *exactly* the same parameters
as an already established connection, then your *_pconnect() call won't
do anything.  It will just return the connection identifier of the
already established connection.

So you should make a single call to *_pconnect() in each script where
you require the use of a database.  If a connection already exists the
call will do nothing, if it doesn't exist then a connection will be
established.


------------------------------------------------------------
Can I configure PHP on a per virtual host basis?
Can I configure PHP on a per directory basis using .htaccess?
http://e-gineer.com/e-gineer/phpkb/view.phtml/qid/386
------------------------------------------------------------
Jon Parise

In Apache, you can add PHP directives within a <VirtualHost> block if
you like, or you can add them to an .htaccess file in the top of your
PHP document root.

These directives are the same as the php3.ini directives except they
are prefixed with 'php3_'.  For example,

<VirtualHost my.host.com>
DocumentRoot /usr/local/apache/htdocs/my.host.com
php3_include_dir /usr/local/apache/php3
</VirtualHost>

For a complete list of configuration directives see:

    http://www.php.net/manual/configuration.php3


------------------------------------------------------------
What's the easiest way to move MySQL data between servers?
How can I move my MySQL tables and data up to my web host?
http://e-gineer.com/e-gineer/phpkb/view.phtml/qid/388
------------------------------------------------------------
Chad Cunningham

The easiest way is to just dump it and import it.

On you development machine:

    mysqldump database_name > dump.sql

Then ftp dump.sql up to your web host and import the data into the MySQL
database there:

    mysql -p ... database_name < dump.sql


------------------------------------------------------------
I have a form with 4 buttons, how can I run a different PHP script for
each?
Can I run different PHP scripts from the same form submission?
How can I make change the action URL for a form using Javascript?
http://e-gineer.com/e-gineer/phpkb/view.phtml/qid/390
------------------------------------------------------------
Frank Kooger, John Coggeshall

A single HTML form can have multiple buttons, but it can only ever have
one action attribute.  That means that every submission from that form
must run that single action URL.

You can run different PHP scripts for different buttons by using
include().

    http://www.php.net/manual/function.include.php3

Just create a single PHP script which contains a conditional statement,
testing for which button was pressed.  You can then just include a
different PHP script for each of the possibilities.

You can do somthing like this:
 
    <FORM ACTION="formproc.php3">
    <INPUT TYPE="submit" NAME="ButtonA" VALUE="Button 1">
    <INPUT TPYE="submit" NAME="ButtonB" VALUE="Button 2">
    </FORM>
 
    formproc.php3
 
    <?php
 
    if(isset($ButtonA)) {
        // code and html for A 
        include("scriptA.php3");
    } 
 
    if(isset($ButtonB)) {
        // code and html for B 
        include("scriptB.php3");
    }
 
    ?>

You can also cause different requests to be sent to the server (ie: the
correct one for each button) using Javascript.  Use Javascript and 4
buttons of type <input type=button> instead of <input type=submit>. Then
you end up with four Javascript functions like:

    function gotopage1()    {
        document.forms[0].action="some.phtm?someparm=somevalue";
        document.master.submit();
    }