CODEWITHSUNDEEP
phpregex
Ovidiu
Ovidiu

Reputation: 2931

Regex that accept custom format

I need to validate a string that can have the following format:

0000000000-0000
1001
1001-1

Possible format that should validate

XXXXXXXXXX-XXXX
XXXX 
XXXX-X

Only digits are required in the string and the - sign is optional. At least 4 digits (up to 10) then optional - sign then a max of 4 more digits (also optional).

I tried \d{4,}-?\d* but as shown here it's matching 1232-test and it shouldn't be. The whole string must be numeric and optional - sign, nothing else.

All the above should pass the regex but nothing else. I could try all day long to come up with something but since I never dig into regex I turn to you guys.

Upvotes: 0

Views: 36

Answers (2)

user557597
user557597

Reputation:

Try this ^\d{4,10}(?:-\d{1,4})?$

https://regex101.com/r/00GCtH/1

Formatted 

 ^                             # Begin of string
 \d{4,10}                      # Required 4 to 10 digits
 (?:                           # Optional dash and 1 to 4 digits
      - \d{1,4} 
 )?
 $                             # End of string

Upvotes: 2

Racil Hilan
Racil Hilan

Reputation: 25351

Your current regex is OK, just add the beginning and end of the line to it:

^\d{4,}-?\d*$

However, if you want to restrict it to your upper limits (up to 10, followed by up to 4) then add them:

^\d{4,10}-?\d{0,4}$

Upvotes: 0

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