php checking if value exist in a 2 level multidimensional array

Question

I have this array:

Array
(
    [01] => Array
        (
            [cat_id] => 15
            [offset] => 4951
        )

    [02] => Array
        (
            [cat_id] => 15
            [offset] => 4251
        )

    [03] => Array
        (
            [cat_id] => 15
            [offset] => 4001
        )

    [04] => Array
        (
            [cat_id] => 15
            [offset] => 4951
        )

    [05] => Array
        (
            [cat_id] => 15
            [offset] => 3301
        )
)

I have the code to get the key on first level using array_key_exists;

if ((array_key_exists("01", $completed_steps))) {
     echo "Found 0!";
}

But I want now to get the cat_id value, how could I do that in a level 2 array?

Try this if ((array_key_exists("cat_id", $completed_steps["01"]))) { — Sahil Gulati
– Sahil Gulati, Commented Oct 3, 2017 at 9:34
@JohnDaleOcayaAndilDale check my answer for multi dimensional search — Jigar Shah
– Jigar Shah, Commented Oct 3, 2017 at 9:44

Jigar Shah · Accepted Answer · 2017-10-03 09:39:49Z

2

Use below code, it will find key to n-level depth and search for given key

function multiKeyExists(array $arr, $key) {

    // is in base array?
    if (array_key_exists($key, $arr)) {
        return $arr[$key]['cat_id']; // returned cat_id 
    }

    // check arrays contained in this array
    foreach ($arr as $element) {
        if (is_array($element)) {
            if (multiKeyExists($element, $key)) {
                return $element[$key]['cat_id']; // returned cat_id
            }
        }

    }

    return false;
}

answered Oct 3, 2017 at 9:39

Jigar Shah

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Comments

Luka Peharda · Accepted Answer · 2017-10-03 09:34:14Z

0

Try like this:

if ((array_key_exists('cat_id', $completed_steps['01'])) {
   echo $completed_steps['01']['cat_id'];
}

answered Oct 3, 2017 at 9:34

Luka Peharda

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Comments

B. Desai · Accepted Answer · 2017-10-03 09:34:32Z

0

You can get particular key-value from it index. See following example:

$check_key = "01";
if ((array_key_exists($check_key, $completed_steps))) {
     echo "Found 0! value of cat_id  = ".$completed_steps[$check_key]['cat_id'];
}

answered Oct 3, 2017 at 9:34

B. Desai

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Comments

Hari · Accepted Answer · 2017-10-03 10:22:08Z

0

use the code below

$final_cat_id_array = array();
$key_to_check = 'cat_id';

$catFunc = function($currentArr) use (&$final_cat_id_array, $key_to_check){
  if(is_array($currentArr) && array_key_exists($key_to_check, $currentArr)){
     $final_cat_id_array[] = $currentArr[$key_to_check];
    }
};

  $arr = array(
     "01" => array("cat_id" => 1, "offset" => true),
     "02" => array("cat_id" => 2, "offset" => false),
     "03" => array("cat_id" => 3, "offset" => true),
  );

 array_walk($arr, $catFunc);

 print_r($final_cat_id_array);

the final $final_cat_id_array will have all the cat_id.

edited Oct 3, 2017 at 10:22

answered Oct 3, 2017 at 9:56

Hari

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