Warning: preg_match() [function.preg-match]: Unknown modifier '/'

Question

I'm trying to use preg_match to return all the URL's that are inclosed in " " in a page source code.

The code I am using is

preg_match('"http://(.+?)\"', $code, $matches);

And I am getting the following error:

Warning: preg_match() [function.preg-match]: Unknown modifier '/' in .... on line 13

score 19 · Accepted Answer · answered Jul 25 '10 at 03:19

19

preg_match('~"http://(.*)"~iU', $code, $matches);

Your issue was you need delimiters (I chose ~) to use with the pattern. See the preg_match() man page for more information.

answered Jul 25 '10 at 03:19

Jim

2

Wait, seriously? You can chose whatever delimiter you want? I've only ever used `/` and there are definitely cases (like this) where using something else would be so much more convenient! +1! – Jeffrey Blake Jul 25 '10 at 03:25
Thanks... Worked like a charm! – ron8 Jul 25 '10 at 03:29
2

@JGB146: Well, *almost* any. You can choose any non-alphanumeric, non-backslash, non-whitespace character as delimiter. – Daniel Egeberg Jul 25 '10 at 10:29
~ is particularly useful if you're matching url-encoded strings as ~ is a character that doesn't need encoding and won't be in the regex, i.e. [^!#$&'()*+,/:;=?@[\\]]+ – Mark Rose Sep 17 '12 at 15:28

score -2 · Answer 2 · edited Sep 26 '12 at 12:23

-2

Try this:

preg_match('"http:\/\/(.+?)\"', $code, $matches);

edited Sep 26 '12 at 12:23

Hauleth

answered Sep 26 '12 at 12:21

2 Answers2