CODEWITHSUNDEEP
regex
Omid
Omid

Reputation: 4715

Substring should not starts with a word

I'm using a RegEx to extract all background-images from a css file.
I simply use a regexp as below: 

/url\s?+\("?([^\)\"]+)?"?\)/

that matches something like url ("images/bg.jpg").
Now i want to ignore background images with absolute URL. So i thought to check if have started with http or https then ignore it.

But don't know how to edit RegEx, I'm programming using PHP

Upvotes: 1

Views: 56

Answers (1)

Bohemian
Bohemian

Reputation: 425418

Use a negative look-ahead (?!http) to assert that the following chars are not "http":

/url\s*\("?(?!http)([^\)\"]+)?"?\)/

Upvotes: 2

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