| public static isSubset ( array | Traversable $needles, array | Traversable $haystack, boolean $strict = false ) : boolean | ||
| $needles | array | Traversable | The values that must **all** be in `$haystack`. |
| $haystack | array | Traversable | The set of value to search. |
| $strict | boolean | Whether to enable strict (`===`) comparison. |
| Результат | boolean | `true` if `$needles` is a subset of `$haystack`, `false` otherwise. |
public static function isSubset($needles, $haystack, $strict = false)
{
if (is_array($needles) || $needles instanceof \Traversable) {
foreach ($needles as $needle) {
if (!static::isIn($needle, $haystack, $strict)) {
return false;
}
}
return true;
} else {
throw new InvalidParamException('Argument $needles must be an array or implement Traversable');
}
}