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<?php $array = array(array('date'=>'2014-12-01', 'price'=>'123.00'), array('date'=>'2013-12-01', 'price'=>'123.00'), array('date'=>'2014-02-01', 'price'=>'123.00'), array('date'=>'2014-03-01', 'price'=>'123.00')); var_dump($array); function date_compare($a, $b) { $t1 = strtotime($a['date']); $t2 = strtotime($b['date']); return $t1 - $t2; } usort($array, 'date_compare'); var_dump($array); function dateCompare($a, $b) { $t1 = strtotime($a); $t2 = strtotime($b); return round(($t1 - $t2)/86400); } var_dump(dateCompare(date(), '2014-03-06'));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> array(2) { ["date"]=> string(10) "2014-12-01" ["price"]=> string(6) "123.00" } [1]=> array(2) { ["date"]=> string(10) "2013-12-01" ["price"]=> string(6) "123.00" } [2]=> array(2) { ["date"]=> string(10) "2014-02-01" ["price"]=> string(6) "123.00" } [3]=> array(2) { ["date"]=> string(10) "2014-03-01" ["price"]=> string(6) "123.00" } } array(4) { [0]=> array(2) { ["date"]=> string(10) "2013-12-01" ["price"]=> string(6) "123.00" } [1]=> array(2) { ["date"]=> string(10) "2014-02-01" ["price"]=> string(6) "123.00" } [2]=> array(2) { ["date"]=> string(10) "2014-03-01" ["price"]=> string(6) "123.00" } [3]=> array(2) { ["date"]=> string(10) "2014-12-01" ["price"]=> string(6) "123.00" } } Fatal error: Uncaught ArgumentCountError: date() expects at least 1 argument, 0 given in /in/S82G2:22 Stack trace: #0 /in/S82G2(22): date() #1 {main} thrown in /in/S82G2 on line 22
Process exited with code 255.

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