如何根据密钥获取多维数组的值？

Question

Example:

$animal = ("bird" => "crow", "cat" => "lion", "snake" => "cobra");

I want to get all values whose keys are

function_name_get_value(["monkey","goat","bird"]);

I tried using array_key_exists() but the problem is I cannot pass the $animal variable since it is specified what arguments are to be passed on function function_name_get_value

Answer 1

It's simple you just need to pass 2 arguments one is name of key and second is array.

function getValue($arr, $key)
{
   return isset($arr[$key]) && is_array($arr) ? $arr[$key] : false;
}

if you want get more keys just use loop.

function getValue($arr, $keyArr)
{
   if(!is_array($arr) || !is_array($keyArr)) return false;

   $found = array();
   foreach($keyArray as $key)
   if(array_key_exists($key, $arr)) $found[$key] = $arr[$key];
   return $found;
}

array_key_exists needs two arguments one is keyname and second is array. I don't see any other option to find a key in array. You must pass 2 parametrs at least