How does php determine how many dimensions an array has?

This article mainly introduces the method of judging whether an array is one-dimensional, two-dimensional or several-dimensional in PHP, involving phprecursive operations and array-related judgment skills, friends in need You can refer to the following

The example of this article describes the method of PHP to determine whether an array is one-dimensional, two-dimensional or several-dimensional. Share it with everyone for your reference, the details are as follows:

The

custom function used here can determine whether the array is one-dimensional, two-dimensional, or several-dimensional:

function getmaxdim($vDim)
{
  if(!is_array($vDim)) return 0;
  else
  {
    $max1 = 0;
    foreach($vDim as $item1)
    {
     $t1 = $this->getmaxdim($item1);
     if( $t1 > $max1) $max1 = $t1;
    }
    return $max1 + 1;
  }
}

It has been verified that it can be used:

//测试：
$arr=array('yiyi'=>1212,'haha'=>array('heihei'=>array(array("a")),"b"));
echo getmaxdim($arr);
//结果： 4

The following code will also determine how many dimensions the array is. Friends who need it can refer to it

<?php
/**
 * 返回数组的维度
 * @param  [type] $arr [description]
 * @return [type]      [description]
 */
function arrayLevel($arr){
    $al = array(0);
    function aL($arr,&$al,$level=0){
        if(is_array($arr)){
            $level++;
            $al[] = $level;
            foreach($arr as $v){
                aL($v,$al,$level);
            }
        }
    }
    aL($arr,$al);
    return max($al);
}
?>

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