PHP: array_keys_exist() - like`array_key_exist(), but for multiple keys

array_keys_exist.php

<?php

/**
 * Returns TRUE if the given keys are all set in the array. Each key can be any value possible for an array index.
 *
 * @see array_key_exists()
 *
 * @param array    $array   An array with keys to check.
 * @param string[] $keys    Keys to check.
 * @param mixed    $missing Reference to a variable that that contains the missing keys.
 *
 * @return bool true if all given keys exist in the given array, false if not
 */
public static function array_keys_exist(array $array, array $keys, &$missing = null) {
    $missing = array_diff($keys, array_keys($array));

    return array_reduce($keys, function($carry, $key) use ($array) {
        return $carry && array_key_exists($key, $array);
    }, true);
}



$array = ['foo' => 'value'];

$requiredKeys = ['foo', 'bar', 'baz'];

if (array_keys_exist($array, $requiredKeys, $missing)) {
    echo "All keys are set.";
} else {
    printf("Keys are missing: %s", implode(', ', $missing));
}

// Output: 
// Keys are missing: bar, baz

NICE!

Something similar I have seen in OptionResolver component from Symfony