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regex

regex that matches 2 types of url

I would like to have a regex that matches both of the following examples:

http://testsite.com/1234/MyPage
http://testsite.com/MyPage

The following examples should however not match: 

http://testsite.com/
http://testsite.com/anything/MyPage

Thanks!

Solution

  • You can use the following regular expression:

    ^http:\/\/testsite\.com(?:\/1234)?\/MyPage$

    And here is a live example: https://regex101.com/r/eu6HdA/4

    If you want to have a list of allowed subpages, you can use the following regular expression:

    ^http:\/\/testsite\.com(?:\/(?:1234|4567|7890))?\/MyPage$

    Live example: https://regex101.com/r/eu6HdA/5

    Explanation:

    • ^ start of the string
    • http:\/\/testsite\.com escaping with \ is necessary for special regex characters
    • (?:\/1234)? match an optional non-matching group of /1234
    • (?:\/(?:1234|4567|7890))? match an optional non-matching group with / and the one of the following 1234, 4567 or 7890
    • $ end of the string