php REGEX to match custom url structure issue

Question

I tried the pattern below with a lot of variations of ( ) and [ ] but I couldn't achieved my aim.

$pattern = '/^http:\/\/www.mydomain.p.ht\/?[\p{L}\p{N}\-]{0,36}\/?[\p{L}\p{N}\-]{0,51}\/?[\p{L}\p{N}\-]{0,101}$/';

My aim is: to match my needed url structure

http://www.mydomain.p.ht
0 or 1 / slash character
utf-8 aware letters, numbers and dash character. Total length is min 0, max 36
0 or 1 / slash character
utf-8 aware letters, numbers and dash character. Total length is min 0, max 51
0 or 1 / slash character
utf-8 aware letters, numbers and dash character. Total length is min 0, max 101. there mustn't exist / slash character at the very end.

currently http://www.mydomain.p.ht/1234561-234561234561234-56123456123456şğ matches but it shouldn't since 1234561-234561234561234-56123456123456şğ part has more than 36 characters.

Can you please correct my pattern?

Andrew Leap · Accepted Answer · 2013-04-11 15:47:53Z

2

Just correcting the regex itself

/^http:\/\/www.mydomain.p.ht(\/|\/[\p{L}\p{N}\-]{1,36}(\/|\/[\p{L}\p{N}\-]{1,51}(\/|\/[\p{L}\p{N}\-]{1,101})?)?)?$/

the issue is that making the / optional allows the regex to combine multiple of the [\p{L}\p{N}-] groups to match more then 36 or 51 chars and so forth. I made one assumption, that you can't have http://www.mydomain.p.ht//1234561-234561234561234-56123456123456şğ, note the double /

For additional info, I highly reccommend http://www.regular-expressions.info/

edited Apr 11, 2013 at 15:47

answered Apr 11, 2013 at 15:40

Andrew Leap

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1 Comment

Andre Chenier Over a year ago

thank you so much. Golden shot. +1 for extra explanation. will be accepted after 5min.

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