Simple verification of IPv6 PHP code-PHP source code

Ec (2); $ ip & quot; 2001: 0db8: 85a3: 08d3: 1319: 8a2e: 0370: 7334 & quot; & nbsp; 02 $ ip & quot; 2001: 0db8: 85a3: 08d3: 7334 & quot; & nbsp; 03if (filter_var ($ ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 )! False) & nbsp; script ec (2); script

$ Ip = "2001: 0db8: 85a3: 08d3: 1319: 8a2e: 0370: 7334 ";

02 // $ ip = "2001: 0db8: 85a3: 08d3: 7334 ";

03 if (filter_var ($ ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 )! = False)

04

05 {

06 echo $ ip. "is an IPv6 Address ";

07} else

08 {

09 echo $ ip. "is NOT an IPv6 Address ";

10}

11 //PHP5.2.0.x passed the test

The filter_var () function filters variables using the specified filter.
If the operation succeeds, filtered data is returned. If the operation fails, false is returned.

02 // literally from the ABNF in rfc3986 (thanks to 'wcp ')

03 function validateIPv6 ($ IP)

04 {

05 return preg_match ('/

06 (? :

07 (? :

08 (? : [A-f0-9] {} :) {6}

09 |

10 ::(? : [A-f0-9] {} :) {5}

11 |

12 (? : [A-f0-9 })? ::(? : [A-f0-9] {} :) {4}

13 |

14 (? :(? : [A-f0-9] {} :) {} [a-f0-9 })? ::(? : [A-f0-9] {} :) {3}

15 |

16 (? :(? : [A-f0-9] {} :) {} [a-f0-9 })? ::(? : [A-f0-9] {} :) {2}

17 |

18 (? :(? : [A-f0-9] {} :) {} [a-f0-9 })? : [A-f0-9 }:

19 |

20 (? :(? : [A-f0-9] {} :) {} [a-f0-9 })? ::

21)

22 (? :

23 [a-f0-9] {}: [a-f0-9}

24 |

25 (? :(? : [0-9] | [1-9] [0-9] | 1 [0-9] [0-9] | 2 [0-4] [0-9] | 25 [0-5]).) {3}

26 (? : [0-9] | [1-9] [0-9] | 1 [0-9] [0-9] | 2 [0-4] [0-9] | 25 [0-5])

27)

28 |

29 (? :

30 (? :(? : [A-f0-9] {} :) {} [a-f0-9 })? : [A-f0-9}

31 |

32 (? :(? : [A-f0-9] {} :) {} [a-f0-9 })? ::

33)

34) Z/ix ',

35 $ IP

36 );

37}

38?>