svn: /phpdoc/de/trunk/language/ operators.xml

raphaelm                                 Mon, 26 Jul 2010 13:09:32 +0000

Revision: http://svn.php.net/viewvc?view=revision&revision=301571

Log:
Bug #52289 closed - I hope correctly

Bug: http://bugs.php.net/52289 (Open) [DE] Ternary Operator section duplicated
      
Changed paths:
    U   phpdoc/de/trunk/language/operators.xml

Modified: phpdoc/de/trunk/language/operators.xml
===================================================================
--- phpdoc/de/trunk/language/operators.xml	2010-07-26 13:08:48 UTC (rev 301570)
+++ phpdoc/de/trunk/language/operators.xml	2010-07-26 13:09:32 UTC (rev 301571)
@@ -455,6 +455,8 @@
     </tgroup>
    </table>

+   <sect2 xml:id="language.operators.comparison.ternary">
+    <title>Ternary Operator</title>
    <para>
     Ein weiter Vergleichs-Operator ist der "?:"- oder
     Trinitäts-Operator.
@@ -487,80 +489,6 @@
     <link linkend="language.operators.array">Array-Operatoren</link>
     und den Abschnitt über <link linkend="language.types">Typen</link>.
    </para>
-
-   <sect2 xml:id="language.operators.comparison.ternary">
-    <title>Ternary Operator</title>
-    <para>
-     Another conditional operator is the "?:" (or ternary) operator.
-     <example>
-      <title>Assigning a default value</title>
-      <programlisting role="php">
-<![CDATA[
-<?php
-// Example usage for: Ternary Operator
-$action = (empty($_POST['action'])) ? 'default' : $_POST['action'];
-
-// The above is identical to this if/else statement
-if (empty($_POST['action'])) {
-    $action = 'default';
-} else {
-    $action = $_POST['action'];
-}
-
-?>
-]]>
-      </programlisting>
-     </example>
-     The expression <literal>(expr1) ? (expr2) : (expr3)</literal>
-     evaluates to <replaceable>expr2</replaceable> if
-     <replaceable>expr1</replaceable> evaluates to &true;, and
-     <replaceable>expr3</replaceable> if
-     <replaceable>expr1</replaceable> evaluates to &false;.
-    </para>
-    <para>
-     Since PHP 5.3, it is possible to leave out the middle part of the ternary
-     operator. Expression <literal>expr1 ?: expr3</literal> returns
-     <replaceable>expr1</replaceable> if <replaceable>expr1</replaceable>
-     evaluates to &true;, and <replaceable>expr3</replaceable> otherwise.
-    </para>
-    <note>
-     <simpara>
-      Please note that the ternary operator is a statement, and that it
-      doesn't evaluate to a variable, but to the result of a statement. This
-      is important to know if you want to return a variable by reference.
-      The statement <literal>return $var == 42 ? $a : $b;</literal> in a
-      return-by-reference function will therefore not work and a warning is
-      issued in later PHP versions.
-     </simpara>
-    </note>
-    <note>
-     <para>
-      It is recommended that you avoid "stacking" ternary expressions. PHP's
-      behaviour when using more than one ternary operator within a single
-      statement is non-obvious:
-      <example>
-       <title>Non-obvious Ternary Behaviour</title>
-       <programlisting role="php">
-<![CDATA[
-<?php
-// on first glance, the following appears to output 'true'
-echo (true?'true':false?'t':'f');
-
-// however, the actual output of the above is 't'
-// this is because ternary expressions are evaluated from left to right
-
-// the following is a more obvious version of the same code as above
-echo ((true ? 'true' : 'false') ? 't' : 'f');
-
-// here, you can see that the first expression is evaluated to 'true', which
-// in turn evaluates to (bool)true, thus returning the true branch of the
-// second ternary expression.
-?>
-]]>
-       </programlisting>
-      </example>
-     </para>
-    </note>
    </sect2>

   </sect1>