3v4l.org

run code in 300+ PHP versions simultaneously
<?php function bar() { echo 'Bar';} function foo() { echo 'X'; restore_error_handler(); $a = $c; } set_error_handler('bar'); set_error_handler('foo'); foo(); $a = $b; print_r( set_error_handler('var_dump') );

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71.14 ms | 402 KiB | 5 Q