How to check the array key in a multidimensional array?

Question

How to check if an array key exist or not array within array?

I need check the user id exist in array, i have below array found,

 Array
(

  [0] => Array
    (
        [user_id] => 1482309797
        [week] => 1
        [type] => 1
        [commission] => 4000
    )

[1] => Array
    (
        [user_id] => 1482309797
        [week] => 1
        [type] => 1
        [commission] => 0
    )

[2] => Array
    (
        [user_id] => 1482309797
        [week] => 1
        [type] => 1
        [commission] => 4000
    )

[3] => Array
    (
        [user_id] => 1482309797
        [week] => 1
        [type] => 1
        [commission] => 0
    )

[4] => Array
    (
        [user_id] => 1483096072
        [week] => 1
        [type] => 1
        [commission] => 4000
    )

[5] => Array
    (
        [user_id] => 1483333245
        [week] => 1
        [type] => 1
        [commission] => 2000
    )

)

I want to check if the user id exist or not, i have tried below code

        foreach ($com_array as $report) {

         $user_id=$report['user_id'];

        if(array_key_exists($user_id,$output_array)){
                echo "Eid found";
         }else{
                echo "id not found";
            }

        }

any one Please help.

Ankit Vadi · Accepted Answer · 2017-01-13 04:46:49Z

1

  foreach ($com_array as $report) {
     if(isset($report['user_id'])){
         echo "Eid found";
     }else{
         echo "id not found";
     }
  }

Try above code, you will get the output.

answered Jan 13, 2017 at 4:46

Ankit Vadi

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Comments

Hikmat Sijapati · Accepted Answer · 2017-01-13 04:46:17Z

1

Try like this...

foreach ($com_array as $key=>$value) {
        if(array_key_exists("user_id",$value)){
                echo "id found";
         }else{
                echo "id not found";
            }

        }

answered Jan 13, 2017 at 4:46

Hikmat Sijapati

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Comments

Mayank Pandeyz · Accepted Answer · 2017-01-13 04:37:44Z

0

There is no built in function for multi dimension array. You can make one like:

function findKey($array, $keySearch)
{
    foreach ($array as $key => $item) {
        if ($key == $keySearch) {
            echo 'yes, it exists';
            return true;
        }
        else {
            if (is_array($item) && findKey($item, $keySearch)) {
               return true;
            }
        }
    }

    return false;
}

answered Jan 13, 2017 at 4:37

Mayank Pandeyz

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Comments

masterFly · Accepted Answer · 2017-01-13 04:46:31Z

0

If you are only to check the existence of a key you could do this.

$user_id_arr = array_column($output_array, 'user_id'); // Get your user_id to a single dimension array
foreach ($com_array as $report) {
    if ( in_array($report['user_id'], $user_id_arr) ){
        echo "ID Found";
    } else {
        echo "ID Not Found";
    }
}

Thanks!

answered Jan 13, 2017 at 4:46

masterFly

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