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run code in 300+ PHP versions simultaneously
<?php class Test { public function register() { register_shutdown_function(function () { // make sure "flush()" is called last when there are multiple shutdown functions register_shutdown_function([$this, 'flush'], true); }); } public function flush() { echo "flush"; } } $a = new Test; $a->register();

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33.34 ms | 402 KiB | 5 Q