3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( '100'=>array('age'=>22,'name'=>'jack','date'=>'2014'), '110'=>array('age'=>23,'name'=>'mary','date'=>'2012'), '120'=>array('age'=>24,'name'=>'lilei','date'=>'2015') ); uasort($arr, function($a, $b) { if( $a['age'] === $b['age'] ){ return $a['date'] - $b['date']; } return $a['age'] - $b['age']; }); print_r($arr);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.7
Array ( [100] => Array ( [age] => 22 [name] => jack [date] => 2014 ) [110] => Array ( [age] => 23 [name] => mary [date] => 2012 ) [120] => Array ( [age] => 24 [name] => lilei [date] => 2015 ) )
preferences:
242.54 ms | 405 KiB | 374 Q