Online PHP editor | refs for fPbfL

<?php $data[] = array('title' => 'hello', 'attributes' => array('id' => 4, 'startdate' => '2013-06-11')); $data[] = array('title' => 'hello second entry', 'attributes' => array('id' => 6, 'startdate' => '2013-04-11')); print "Inital Data\n"; print_r($data); print "\n"; usort($array, function($a, $b) { if ($a['attributes']['startdate'] > $b['attributes']['startdate']) return 1; if ($a['attributes']['startdate'] < $b['attributes']['startdate']) return -1; return 0; }); print "Sorted Data\n"; print_r($data); print "\n";