CODEWITHSUNDEEP
regexregular-language
MasOOd.KamYab
MasOOd.KamYab

Reputation: 974

Iranian postal code validation

Please, I need to validate Iranian postal code using regex. I write this regex for this case \b([^02\n\D]){4}[^5](\d){5} but its not working on rule number 5 and 7. please help me to fix it.

this is some rules about this regex:

  1. It's all numeric

  2. 10 digit count

  3. don't use 0 in first 5 digit

  4. don't use 2 in postal code

  5. First 4 digit is not the same

  6. The 5th digit cannot be 5

  7. all digits aren't the same

Upvotes: 29

Views: 3748

Answers (1)

Gurmanjot Singh
Gurmanjot Singh

Reputation: 10360

The following regex satisifes your conditions:

\b(?!(\d)\1{3})[13-9]{4}[1346-9][013-9]{5}\b

Click for Demo

Explanation:

  • \b - a word boundary
  • (?!(\d)\1{3}) - negative lookahead to make sure that the 1st 4 digits are not the same.
  • [13-9]{4} - matches 4 occurrences of all the digits except 0 and 2
  • [1346-9] - matches a single digit that is not a 0,2 or 5
  • [013-9]{5} - matches 5 occurrences of all the digits except 2
  • \b - a word boundary

Upvotes: 34

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