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如何用return遍历无限数组

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Release: 2016-06-13 10:21:48
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怎么用return遍历无限数组?
$arr=array(array(6,66),8);
function arr_p($arr){
  foreach ($arr as $v){
  if(is_array($v)){
  arr_p($v);
  }else{
  echo $v."
";}
  }
}
arr_p($arr);
?>

这段是直接echo出的,现在想用return,不知如何下手,希望高人指点一下!(小弟是php初学者)

------解决方案--------------------
$arr=array(array(6,66),8);
function arr_p($arr){
$r = '';
foreach ($arr as $v){
if(is_array($v)){
$r .= arr_p($v);
}else{
$r .= $v."
";}
}
return $r;
}
echo arr_p($arr);
------解决方案--------------------

PHP code
function arr_p($arr){  $r = ''; //因为要返回数据,所以要有一个载体  foreach ($arr as $v){    if(is_array($v)){ //如果是数组,据递归进入      $r .= arr_p($v); //接住返回的数据    }else{      $r .= $v."<br>"; //不是数组,不也要保存数据吗    }  }  return $r; //返回数据}<div class="clear">
                 
              
              
        
            </div>
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