3v4l.org

run code in 300+ PHP versions simultaneously
<?php function __autoload($c) { echo $c; } function bar($t, $m) { echo $m;} function foo() { echo 'X'; restore_error_handler(); $a = $c; } set_error_handler(array('bar','too')); set_error_handler('foo'); $a = $b; print_r( set_error_handler('var_dump') );

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35.02 ms | 402 KiB | 5 Q