| 1 | <?php | ||
| 7 | class IP implements Host | ||
| 8 | { | ||
| 9 | const IPV4 = 'IPv4'; | ||
| 10 | const IPV6 = 'IPv6'; | ||
| 11 | |||
| 12 | /** | ||
| 13 | * @var string | ||
| 14 | */ | ||
| 15 | private $value; | ||
| 16 | |||
| 17 | /** | ||
| 18 | * Initialize IP. | ||
| 19 | * | ||
| 20 | * @param $value | ||
| 21 | * | ||
| 22 | * @throws InvalidArgumentException | ||
| 23 | */ | ||
| 24 | private function __construct($value) | ||
| 32 | |||
| 33 | /** | ||
| 34 | * Create IP from string. | ||
| 35 | * | ||
| 36 | * @param $string | ||
| 37 | * | ||
| 38 | * @return IP | ||
| 39 | */ | ||
| 40 | public static function fromString($string) | ||
| 44 | |||
| 45 | /** | ||
| 46 | * Create IP from current request. | ||
| 47 | * | ||
| 48 | * @return IP | ||
| 49 | */ | ||
| 50 | public static function fromCurrentRequest() | ||
| 54 | |||
| 55 | /** | ||
| 56 | * Check if string is a valid IP. | ||
| 57 | * | ||
| 58 | * @param string $value | ||
| 59 | * | ||
| 60 | * @return bool | ||
| 61 | */ | ||
| 62 | public static function validate($value) | ||
| 66 | |||
| 67 | /** | ||
| 68 | * Get the version (IPv4 or IPv6) of the IP. | ||
| 69 | * | ||
| 70 | * @return string | ||
| 71 | */ | ||
| 72 | public function getVersion() | ||
| 80 | |||
| 81 | /** | ||
| 82 | * Compare equality with another Host. | ||
| 83 | * | ||
| 84 | * @param Host $other | ||
| 85 | * | ||
| 86 | * @return bool | ||
| 87 | */ | ||
| 88 | public function equals(Host $other) | ||
| 92 | |||
| 93 | /** | ||
| 94 | * Get string representation of IP. | ||
| 95 | * | ||
| 96 | * @return string | ||
| 97 | */ | ||
| 98 | public function toString() | ||
| 102 | |||
| 103 | /** | ||
| 104 | * Cast IP to string. | ||
| 105 | * | ||
| 106 | * @return string | ||
| 107 | */ | ||
| 108 | public function __toString() | ||
| 112 | } | ||
| 113 | 
Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: