php remove element from array by value

1$colors = array("blue","green","red");
2
3//delete element in array by value "green"
4if (($key = array_search("green", $colors)) !== false) {
5    unset($colors[$key]);
6}

1if (($key = array_search('strawberry', $array)) !== false) {
2    unset($array[$key]);
3}

1// matrix array
2foreach($appsList as $key => $app) {
3            if($app["app_status"] !== "approved") {
4                // remove orange apps
5                unset($appsList[$key]);
6            }
7}