<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Returns an array of all defined variables</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.floatval.html">floatval</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.get-resource-type.html">get_resource_type</a></div> <div class="up"><a href="ref.var.html">Variable handling Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.get-defined-vars" class="refentry"> <div class="refnamediv"> <h1 class="refname">get_defined_vars</h1> <p class="verinfo">(PHP 4 >= 4.0.4, PHP 5)</p><p class="refpurpose"><span class="refname">get_defined_vars</span> — <span class="dc-title"> Returns an array of all defined variables </span></p> </div> <div class="refsect1 description" id="refsect1-function.get-defined-vars-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><strong>get_defined_vars</strong></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> This function returns a multidimensional array containing a list of all defined variables, be them environment, server or user-defined variables, within the scope that <span class="function"><strong>get_defined_vars()</strong></span> is called. </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.get-defined-vars-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> A multidimensional array with all the variables. </p> </div> <div class="refsect1 examples" id="refsect1-function.get-defined-vars-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-5251"> <p><strong>Example #1 <span class="function"><strong>get_defined_vars()</strong></span> Example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />$b </span><span style="color: #007700">= array(</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">8</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$arr </span><span style="color: #007700">= </span><span style="color: #0000BB">get_defined_vars</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">// print $b<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr</span><span style="color: #007700">[</span><span style="color: #DD0000">"b"</span><span style="color: #007700">]);<br /><br /></span><span style="color: #FF8000">/* print path to the PHP interpreter (if used as a CGI)<br /> * e.g. /usr/local/bin/php */<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">$arr</span><span style="color: #007700">[</span><span style="color: #DD0000">"_"</span><span style="color: #007700">];<br /><br /></span><span style="color: #FF8000">// print the command-line parameters if any<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr</span><span style="color: #007700">[</span><span style="color: #DD0000">"argv"</span><span style="color: #007700">]);<br /><br /></span><span style="color: #FF8000">// print all the server vars<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr</span><span style="color: #007700">[</span><span style="color: #DD0000">"_SERVER"</span><span style="color: #007700">]);<br /><br /></span><span style="color: #FF8000">// print all the available keys for the arrays of variables<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">array_keys</span><span style="color: #007700">(</span><span style="color: #0000BB">get_defined_vars</span><span style="color: #007700">()));<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </p> </div> <div class="refsect1 changelog" id="refsect1-function.get-defined-vars-changelog"> <h3 class="title">Changelog</h3> <p class="para"> <table class="doctable informaltable"> <thead> <tr> <th>Version</th> <th>Description</th> </tr> </thead> <tbody class="tbody"> <tr> <td>5.0.0</td> <td> The <var class="varname"><var class="varname"><a href="reserved.variables.globals.html" class="classname">$GLOBALS</a></var></var> variable is included in the results of the array returned. </td> </tr> </tbody> </table> </p> </div> <div class="refsect1 seealso" id="refsect1-function.get-defined-vars-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.isset.html" class="function" rel="rdfs-seeAlso">isset()</a> - Determine if a variable is set and is not NULL</span></li> <li class="member"> <span class="function"><a href="function.get-defined-functions.html" class="function" rel="rdfs-seeAlso">get_defined_functions()</a> - Returns an array of all defined functions</span></li> <li class="member"> <span class="function"><a href="function.get-defined-constants.html" class="function" rel="rdfs-seeAlso">get_defined_constants()</a> - Returns an associative array with the names of all the constants and their values</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.floatval.html">floatval</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.get-resource-type.html">get_resource_type</a></div> <div class="up"><a href="ref.var.html">Variable handling Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>