php实现遍历多维数组办法

$a=array('fruits'=>array('a'=>'orange','b'=>'grape',c=>'apple'), 'numbers'=>array(1,2,3,4,5,6), 'holes'=>array('first',5=>'second','third') );//第一种：foreach($a as $list=>$things){ if(is_array($things)){ foreach($things as $newlist=>$counter){ echo "key:".$newlist."
"."value:".$counter."
"; }}}//第二种:function MulitarraytoSingle($array){   $temp=array();   if(is_array($array)){     foreach ($array as $key=>$value )     {       if(is_array($value)){         MulitarraytoSingle($value);       }       else{         $temp[]=$value;       }     }   }}