Online PHP editor | output for A622b

<?php $arr=array( array("count"=>10,"date"=>"2014-04-16"), array("count"=>50,"date"=>"2014-04-18"), array("count"=>80,"date"=>"2014-04-20") ); $date =array("2014-04-16","2014-04-17","2014-04-18","2014-04-19","2014-04-20"); foreach($arr as $k =>$v ){ //if(!array_key_exists($v['date'],$date)){ // $arr[]=array("count"=>0,"date"=>$date) //} $tt[]=$v['date'];$cc[]=$v['count']; $new[$v['date']]=$v["count"]; }print_r($new); //print_r(array_combine($date,$new)); //foreach($new as $k =>$v){ foreach($date as $k2 =>$v2 ){ if(!array_key_exists($v2,$new)){$new[$v2]=0;} }print_r($new); //} foreach ($new as $k => $v){ $data[]=array("count"=>$v,"date"=>$k); } /*foreach($arr as $k2 =>$v2 ){foreach($date as $k =>$v ){ if(!array_key_exists($v,$tt)){ $arr[]=array("count"=>0,"date"=>$v); } } }*/ usort($data, function($a, $b) { if($a['date'] == $b['date']) return 0; return $a['date'] > $b['date'] ? 1 : -1; }); print_r($data);die; //对应$date所有日期转换为 $arr=array( array("count"=>10,"date"=>"2014-04-16"), array("count"=>0,"date"=>"2014-04-17"), array("count"=>50,"date"=>"2014-04-18"), array("count"=>0,"date"=>"2014-04-19"), array("count"=>80,"date"=>"2014-04-20") );