Online PHP editor | output for G1Eqn

@ 2017-04-10T06:09:54Z

<?php

function callback($buffer, $status) {
    return "callback $buffer";

}

ob_start( 'callback', 0, PHP_OUTPUT_HANDLER_FLUSHABLE | PHP_OUTPUT_HANDLER_REMOVABLE);

echo 'test';

echo ob_get_clean();         //this should not work as no CLEANABLE flag was set on ob_start
                             //ob_end_clean is ran as well
                             //ob_clean -> failed to delete buffer notice

echo "\n".ob_get_level();

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: test 0
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Notice: Use of undefined constant PHP_OUTPUT_HANDLER_FLUSHABLE - assumed 'PHP_OUTPUT_HANDLER_FLUSHABLE' in /in/G1Eqn on line 8 Notice: Use of undefined constant PHP_OUTPUT_HANDLER_REMOVABLE - assumed 'PHP_OUTPUT_HANDLER_REMOVABLE' in /in/G1Eqn on line 8 test 0

preferences:dark modelive previewkey bindings