ob_list_handlers

List all output handlers in use

&reftitle.description; `array` `ob_list_handlers`

Lists all output handlers in use.

&reftitle.returnvalues;

This will return an array with the output handlers in use (if any). If output_buffering is enabled or an anonymous function was used with `ob_start`, `ob_list_handlers` will return "default output handler".

&reftitle.examples;

### `ob_list_handlers` example

    <?php
    //using output_buffering=On
    print_r(ob_list_handlers());
    ob_end_flush();

    ob_start("ob_gzhandler");
    print_r(ob_list_handlers());
    ob_end_flush();

    // anonymous functions
    ob_start(function($string) { return $string; });
    print_r(ob_list_handlers());
    ob_end_flush();
    ?>

&example.outputs;

    Array
    (
        [0] => default output handler
    )

    Array
    (
        [0] => ob_gzhandler
    )

    Array
    (
        [0] => Closure::__invoke
    )

&reftitle.seealso;

- `ob_end_clean`
- `ob_end_flush`
- `ob_get_flush`
- `ob_start`