Online PHP editor | refs for qplgO

<?php $events=array(array("date"=>"20130329","title"=>"Run","cats"=>array(array("name"=>"Cause 2","slug"=>"cause-2","sort"=>1))),array("date"=>"20130131","title"=>"Run2","cats"=>array(array("name"=>"Abused Children","slug"=>"abused-children","sort"=>2),array("name"=>"Animal Welfare","slug"=>"animal-welfare","sort"=>3),array("name"=>"Education","slug"=>"education","sort"=>1)))); $events=array_map(function($arr){ usort($arr["cats"],function($a,$b){ return $a["sort"]-$b["sort"]; }); return $arr; },$events); foreach($events as $event) { echo "Event: ".$event["title"]."\n"; foreach($event["cats"] as $cat) { echo " Cat: ".$cat["name"]."\n"; } }