(PHP 4 >= 4.3.0, PHP 5, PHP 7)
ob_list_handlers — List all output handlers in use
Lists all output handlers in use.
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".
Example #1 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();
?>
The above example will output:
Array
(
[0] => default output handler
)
Array
(
[0] => ob_gzhandler
)
Array
(
[0] => Closure::__invoke
)