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run code in 150+ php & hhvm versions
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<?php $array[] = Array(Array(0=>'December', 1=>'1', 2=>'2013'),'stamp'=> 1385874000); $array[] = Array(Array(0=>'December', 1=>'1', 2=>'2013'),'stamp'=> 1388293200); $array[] = Array(Array(0=>'December', 1=>'1', 2=>'2013'),'stamp'=> 1357189200); usort($array, function($a, $b) { return $a['stamp'] - $b['stamp']; }); print_r($array) ; ?>
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => Array ( [0] => Array ( [0] => December [1] => 1 [2] => 2013 ) [stamp] => 1357189200 ) [1] => Array ( [0] => Array ( [0] => December [1] => 1 [2] => 2013 ) [stamp] => 1385874000 ) [2] => Array ( [0] => Array ( [0] => December [1] => 1 [2] => 2013 ) [stamp] => 1388293200 ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/j8Ych on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/j8Ych on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/j8Ych on line 6
Process exited with code 255.