Online PHP editor | refs for PHfLi

<?php if (!function_exists('array_all')) { // polyfill for PHP versions below 8.4 function array_all(array $array, callable $callback): bool { foreach ($array as $key => $value) { if (!$callback($value, $key)) { return false; } } return true; } } $array = [1, '2', -644, '45.55', 3.14, 1e4]; var_export( array_all($array, fn($v) => is_numeric($v)) );