Question

i have this array
the name of array is $list

when i type this:

$mychild = $list[1]['children'];

but if there is no child i get this message

A PHP Error was encountered
Severity: Notice
Message: Undefined index: children
Filename: controllers/user.php
Line Number: 384

how i can check if there is child in array items?

Array
    (    
        [0] => Array
            (
                [id] => 7
                [children] => Array
                    (
                        [0] => Array
                            (
                                [id] => 9
                            )

                    )

            )

        [1] => Array
            (
                [id] => 6
            )

        [2] => Array
            (
                [id] => 8
            )

        [3] => Array
            (
                [id] => 10
            )

    )

Answer 1

isset($list[1]['children'])

or

array_key_exists('children', $list[1])

See isset() and array_key_exists()