Online PHP editor | output for qIXij

<?php $array = [ 'school' => [ 'college' => [ 'nursing' => ['n1a', 'n2a', 'n3a', 'n4a'], 'hrm' => ['h1a', 'h2a', 'h3a', 'h4a'], 'tourism' => ['t1a', 't2a', 't3a', 't4a'], 'it' => ['i1a', 'i2a', 'i3a', 'i4a'], ], 'senior' => [], ], 'business' => [ 'office' => [ 'dep1' => ['team1', 'team2'], 'dep2' => ['team1', 'team2'], 'dep3' => ['team1', 'team2'], 'dep4' => ['team1', 'team2'], ], ], ]; $result = []; $search = "hrm"; function searchItemsByKey($array, $key) { $retArr = []; if (is_array($array)) { if (!empty($array[$key])) { return $array[$key]; } foreach ($array as $val) { $retArr = array_merge($retArr, searchItemsByKey($val, $key)); } } return $retArr; } $temp = searchItemsByKey($array, 'hrm'); print_r($temp);die;