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run code in 150+ php & hhvm versions
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<?php function cmp($a, $b) { echo 'test'; if ($a == $b) { return 0; } return ($a < $b) ? -1 : 1; } $a = array(3, 2, 5, 6, 1); usort($a, "cmp"); foreach ($a as $key => $value) { echo "$key: $value\n"; }
based on oaSIv
Output for 7.0.0 - 7.1.0
testtesttesttesttesttesttesttest0: 1 1: 2 2: 3 3: 5 4: 6
Output for 4.3.0 - 5.6.28
testtesttesttesttesttest0: 1 1: 2 2: 3 3: 5 4: 6