php需要从数组中检索键：'dn'值

Question

I am trying to retreive value of a key 'dn' from an array.

Here is my code: https://ideone.com/3gUfWs

Output getting as :

array (
  'cn' => 
  array (
    'count' => 1,
    0 => 'abcd',
  ),
  0 => 'cn',
  'count' => 1,
  'dn' => 'cn=abcd,ou=test,dc=myproj,dc=com',
)

But What I need output as : cn=abcd,ou=test,dc=myproj,dc=com

BTW, here is my same code provided in above link:

<?php

$cat = array(
  "Name"    => "Percy",
  "Colour"  => "Black",
  "Hobbies" => array(
    1 => "Chasing mice",
    2 => "Sleeping",
    3 => "Prowling"
  ),
   "Name"    => "Jackson",
);


$cat2 = array(
    'count' => 1,
    0 => array(
        'cn' => array(
            'count' => 1,
            0 => 'abcd',
        ) ,
        0 => 'cn',
        'count' => 1,
        'dn' => 'cn=abcd,ou=test,dc=myproj,dc=com',
    ) ,
);

$output = "";
// Find the value of a Key
function seekKey($haystack, $needle){
    global $output;
  foreach($haystack as $key => $value){
    if($key == $needle){
      $output = $value;

    }elseif(is_array($value)){
      $output = seekKey($value, $needle);

    }
  }
  return $output;
}

var_export(seekKey($cat2,"dn"));

?>

Answer 1

Just need to change if($key == $needle){ to if($key === $needle){

Answer to why? is here.