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run code in 300+ PHP versions simultaneously
<?php $x = 1; $y = 2; if (!($x == $y)) { echo 'Are equal'; } else { echo 'Are not equal'; } echo "\n"; if (!$x == $y) { echo 'Are equal'; } else { echo 'Are not equal'; } var_dump(!$x);

preferences:
32.78 ms | 402 KiB | 5 Q