get_defined_vars

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

Returns an array of all defined variables

array get_defined_vars ( void )

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 get_defined_vars() is called.

Returns:

A multidimensional array with all the variables.

Examples:

get_defined_vars() Example

<?php
$b = array(1, 1, 2, 3, 5, 8);
 
$arr = get_defined_vars();
 
// print $b
print_r($arr["b"]);
 
/* print path to the PHP interpreter (if used as a CGI)
 * e.g. /usr/local/bin/php */
echo $arr["_"];
 
// print the command-line parameters if any
print_r($arr["argv"]);
 
// print all the server vars
print_r($arr["_SERVER"]);
 
// print all the available keys for the arrays of variables
print_r(array_keys(get_defined_vars()));
?>