Check message codes in the UK using regular expressions

Question

I want to check the field with the British postal code. What regular expression can be used to validate this field ?. (([A-Z]{1,2}[0-9][0-9A-Z]{0,1})\ ([0-9][A-Z]{2}))|(GIR\ 0AA)$really valid because it has a GIR 0AA exception .

So please help me write an expression without any exceptions.

Answer 1

If you mean a zip code, wikipedia has a verification section . One regular expression that it recommends:

((A[BL]|B[ABDHLNRST]?|C[ABFHMORTVW]|D[ADEGHLNTY]|E[HNX]?|F[KY]|G[LUY]?|H[ADGPRSUX]|I[GMPV]|JE|K[ATWY]|L[ADELNSU]?|M[EKL]?|N[EGNPRW]?|O[LX]|P[AEHLOR]|R[GHM]|S[AEGKLMNOPRSTY]?|T[ADFNQRSW]|UB|W[ADFNRSV]|YO|ZE)[1-9]?[0-9]|([E|N|NW|SE|SW|W]1|EC[1-4]|WC[12])[A-HJKMNPR-Y]|[SW|W]([1-9][0-9]|[2-9])|EC[1-9][0-9]) [0-9][ABD-HJLNP-UW-Z]{2}

, .

Answer 2

: GIR 0AA ( , ).

, , , , , GU78 2AB ( GU78 2AA, 2AB), GU77 2AB .

, , , . , , , :

(([A-Z]{1,2}[0-9]{1,2})\ ([0-9][A-Z]{2}))|(GIR\ 0AA)$

Answer 3

^([A-PR-UWYZ0-9][A-HK-Y0-9][AEHMNPRTVXY0-9]?[ABEHMNPRVWXY0-9]? {1,2}[0-9][ABD-HJLN-UW-Z]{2}|GIR 0AA)$