CODEWITHSUNDEEP
phpregexhtml-parsing
Branislav
Branislav

Reputation: 315

Regex to match http:// but not http:// with quotation mark in front

I have this RegEx expression to match http:// links-like part of text:

([A-Za-z]{3,9}):\/\/([-;:&=\+\$,\w]+@{1})?([-A-Za-z0-9\.]+)+:?(\d+)?(\/[-\+~%\/\.\w]+)?\??([-\+=&;%@\.\w]+)?#?([\w]+)?

and later convert them to hyperlinks with some code. It really works good.

However, http:// part of text can be found in < img > tag too:

<img src="http://www.nature.com/images/home_03/main_news_pic2013.02.19.jpg" alt="Pulpit rock" width="304" height="228">

So, I have to modify existing RegEx to NOT match http links-like part of text with quotation mark or apostrophe before. How to NOT match:

"http

I tried with [^"|']:

[^"|']([A-Za-z]{3,9}):\/\/ ..........

but it does not work.

Upvotes: 0

Views: 148

Answers (1)

Richard
Richard

Reputation: 109100

You need to use a negative lookbehind (ie. "not preceded by"):

(?<!")http://…

Upvotes: 2

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