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<?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']; } foreach($date as $k =>$v ){ foreach($arr as $k2 =>$v2 ){ if(!array_key_exists($v,$tt)){ $arr[]=array("count"=>0,"date"=>$v); } } } print_r($arr); //对应$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") );