[PHP-DOC] cvs: phpdoc /en/language functions.xml

[Jakub Vrana]

vrana           Sun Feb 13 17:32:44 2005 EDT

  Modified files:              
    /phpdoc/en/language functions.xml 
  Log:
  Recursive functions (spotted by ondra at dynawest.cz)
  
http://cvs.php.net/diff.php/phpdoc/en/language/functions.xml?r1=1.57&r2=1.58&ty=u
Index: phpdoc/en/language/functions.xml
diff -u phpdoc/en/language/functions.xml:1.57 
phpdoc/en/language/functions.xml:1.58
--- phpdoc/en/language/functions.xml:1.57       Sun Feb 13 17:13:07 2005
+++ phpdoc/en/language/functions.xml    Sun Feb 13 17:32:44 2005
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.57 $ -->
+<!-- $Revision: 1.58 $ -->
  <chapter id="language.functions">
   <title>Functions</title>
 
@@ -130,6 +130,28 @@
     <function>func_get_arg</function>, and
     <function>func_get_args</function> for more information.
    </simpara>
+   
+   <para>
+    It is possible to call recursive functions in PHP. However avoid recursive
+    function/method calls with over 100-200 recursion levels as it can smash
+    the stack and cause a termination of the current script.
+    <example>
+     <title>Recursive functions</title>
+     <programlisting role="php">
+<![CDATA[
+<?php
+function recursion($a)
+{
+    if ($a < 20) {
+        echo "$a\n";
+        recursion($a + 1);
+    }
+}
+?>
+]]>
+     </programlisting>
+    </example>
+   </para>
 
   </sect1>