Remove Parent in PHP Multidimensional Array

Question

What's the best way to remove the parent of a matched key in an Multidimensional Array? For example, let's assume we have the following array and I want to find "[text] = a" and then delete its parent array [0]...

(array) Array
(

[0] => Array
    (
        [text] => a
        [height] => 30
    )

[1] => Array
    (
        [text] => k
        [height] => 30
    )
)

Answer 1

Here’s the obvious:

foreach ($array as $key => $item) {
    if ($item['text'] === 'a') {
        unset($array[$key]);
    }
}

Answer 2

using array_filter:

function filter_callback($v) {
  return !isset($v['text']) || $v['text'] !== 'a';
}
$array = array_filter($array, 'filter_callback');

this will only leave 'parent elements' in the array where text != a, therefore deleting those where text equals a