get_defined_vars

Returns an array of all defined variables

&reftitle.description; `array` `get_defined_vars`

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.

&reftitle.parameters; &no.function.parameters;
&reftitle.returnvalues;

A multidimensional array with all the variables.

&reftitle.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()));
    ?>

&reftitle.seealso;

- `isset`
- `get_defined_functions`
- `get_defined_constants`