3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array ( array("DATE" => "2007-01-12", "STUFF"=>"bleh"), array("DATE" => "2007-01-13", "STUFF"=>"bleh"), array("DATE" => "2007-01-01", "STUFF"=>"bleh") ); function cmp($a, $b){ if ($a["DATE"] == $b["DATE"]) return 0; return ($a["DATE"] < $b["DATE"]) ? -1 : 1; } usort($a, "cmp"); var_dump($a);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [0]=> array(2) { ["DATE"]=> string(10) "2007-01-01" ["STUFF"]=> string(4) "bleh" } [1]=> array(2) { ["DATE"]=> string(10) "2007-01-12" ["STUFF"]=> string(4) "bleh" } [2]=> array(2) { ["DATE"]=> string(10) "2007-01-13" ["STUFF"]=> string(4) "bleh" } }

preferences:
232.98 ms | 406 KiB | 345 Q