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run code in 150+ php & hhvm versions
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<?php $array = array( array('date'='2014-12-01', 'price'='123.00'), array('date'='2013-12-01', 'price'='123.00'), array('date'='2014-02-01', 'price'='123.00'), array('date'='2014-03-01', 'price'='123.00'), ) function sortByDate($a, $b) { return $a['date'] - $b['date']; } usort($array, 'sortByDate'); var_dump($array);
Output for 5.3.0 - 5.4.26
Parse error: syntax error, unexpected '=', expecting ')' in /in/5MZH2 on line 3
Process exited with code 255.