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run code in 300+ PHP versions simultaneously
<?php $a = array(); $a[1] = 'test1'; $a[2] = 'test2'; $a[5] = 'test5'; $a[4] = 'test4'; $a[3] = 'test3'; sort($a); print_r($a);

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42.61 ms | 402 KiB | 5 Q