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get_defined_vars

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

get_defined_vars — Returns an array of all defined variables

Description

get_defined_vars(): array

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.

Parameters

This function has no parameters.

Return Values

A multidimensional array with all the variables.

Examples

Example #1 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()));
?>

See Also