用PHP中的正则表达式从页面中提取网址[复制]

Question

This question is an exact duplicate of:

• extracting urls from a page with regex 3 answers

How would I make a regex to extract urls from a page where I am matching to a center part of a url

For example my urls to match would be something like:

http://m2.imageserver.net/media/thumb/66177422433.jpg http://m4.imageserver.net/media/thumb/21717623342.jpg http://m1.imageserver.net/media/thumb/12327722433.jpg

And I want to match by just the imageserver.net/media section of the url as the sub domain may change.

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Answer 1

Your regex would be http://[a-zA-Z0-9]+.imageserver.net+[a-zA-Z0-9/]+.jpg.

Advice: Before trying out on code, please check using regexpal. It's basically a javascript regex tester.

Update: Adding a delimiter:

$match_pattern = "#http:\/\/[a-zA-Z0-9]+.imageserver.net+[a-zA-Z0-9\/]+.jpg#";
preg_match_all($match_pattern,$string_to_be_matched,$url_array);