php - issue in sorting a date array -


this question has answer here:

i want sort array on date basis.

i used below code sort array

<?php $a=array("14-10-2013","15-10-2013","16-10-2013","13-11-2013","17-11-2013","18-10-2013","19-10-2013"); array_multisort($a); print_r($a); ?>

this gives me result

array ( [0] => 13-11-2013 [1] => 14-10-2013 [2] => 15-10-2013 [3] => 16-10-2013 [4] => 17-11-2013 [5] => 18-10-2013 [6] => 19-10-2013 )

this not correct order.

the correct order should be

array ( [0] => 14-10-2013 [1] => 15-10-2013 [2] => 16-10-2013 [3] => 18-10-2013 [4] => 19-10-2013 [5] => 13-11-2013 [6] => 17-11-2013 )

what should have correct sequence of date?

use code :

$a=array("14-10-2013","15-10-2013","16-10-2013","13-11-2013","17-11-2013","18-10-2013","19-10-2013");  usort($a, "sortfunction");  print_r($a);  function sortfunction( $a, $b ) {     return strtotime($a) - strtotime($b); }  output   array (     [0] => 14-10-2013     [1] => 15-10-2013     [2] => 16-10-2013     [3] => 18-10-2013     [4] => 19-10-2013     [5] => 13-11-2013     [6] => 17-11-2013 )

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