php find item dimension in array

find items level(depth) in array;

hi im new in php and i cant find any method to find what dimension array items are in. for example:

array=>[
  'name'=>'jack'
  , 'age'=>'18'
  , 'info'=>[
    'address'=>'bla bla bla'
    , 'email'=>'[e-mail]'
  ]
]

function findDepth($key)
{
  // do something
}

$result = findDepth('email');

$result // int(2)

the array above has key named email and the email key is in second level of the array. is there any function or method or way to find this level.

I found a method that tell you how deep array is: Is there a way to find out how “deep” a PHP array is?

Answer

Try using recursive function:

<?php

$array = [
    'name'=>'jack', // Level 0
    'age'=>'18',
    'info'=>[ // Level 1
        'address'=>'bla bla bla',
        'contacts' => [ // Level 2
            'email'=>'[e-mail]'
        ],
    ],
];

function getArrayKeyDepth(array $array, $key, int $currentDepth = 0): ?int
{
    foreach($array as $k => $v){
        if ($key === $k) {
            return $currentDepth;
        }
        
        if (is_array($v)) {
            $d = getArrayKeyDepth($v, $key, $currentDepth + 1);
            
            if ($d !== null) {
                return $d;
            }
        }
    }
    
    return null;
}

echo "Result:  ". getArrayKeyDepth($array, 'email');

This will give you “Result: 2”