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run code in 300+ PHP versions simultaneously
<?php function incre() { return [ 1 => null, 2 => null, 3 => 1, ]; } $a = incre()[0] ?? 0; var_dump($a); $b = incre()[1] ?? 0; var_dump($b); $c = incre()[3] ?? 0; var_dump($c);

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55.75 ms | 402 KiB | 5 Q