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get_defined_vars

(PHP 4 >= 4.0.4, PHP 5)

get_defined_vars --  Returns an array of all defined variables

Description

array get_defined_vars ( void )

This function returns an multidimensional array containing a list of all defined variables, be them environment, server or user-defined variables.

<?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 paramaters 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 get_defined_functions() and get_defined_constants().

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