php - Get an array element by key php

Question

I have an array of (many) arrays, encoded at different depths. The problem is that I know the key of the element I am searching for, but not the depth of the encoding. So for example it might be
Array ( [1] => Array ( [1] => Array ('abcd' => 'a' ) ) or Array ('abcd' => 'a' ) So is there any way to find that abcd key?

Answer 1

if (array_key_exists('abcd', $search_array))

Answer 2

function find_array_key($array,$keytofind){
 $found=false;
 if (is_array($array)&& $found==false){
   foreach($array as $key=>$value){
      if (is_array($value)&& $found==false){
        find_array_key($array,$keytofind)
      }else{ 
         if ($found==false && $key=$keytofind){
          $found=$value;
         }
      }
   }
   return $found;
 }

我没有运行这段代码来测试它，但它应该非常接近一个很好的递归函数，用于你正在尝试做的事情并返回你正在寻找的键的值