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