question about regular expression for preg_replace()

benz

I would like to change

src= test.html to src=/path/test.html
src="test.html" to src="/path/test.html"

I am doing like this:

$pattern = '/src=("|)(.+?)("| )/i';
$replace[0] = "src=\"$path\2\"";
print preg_replace($pattern,$replace,$string);

What should I do if I want

src=http://test.html
src="http://test.html"

remain unchanged ?
😕

xblue

the only possibility I can think of are negative lookaheads.

simplified example:
#src="?(?![url]http://[/url])([^"\s]+)#

(edit: modified pattern for better results if url isn't within quotes)

benz

Originally posted by xblue
the only possibility I can think of are negative lookaheads.

simplified example:
#src="?(?![url]http://[/url])([^"]+)#

Thanks for your reply!
would you please give up the full code
because I am a super junior in regular expression. Thanks!

xblue

why don't you just try what I gave you?
if you want to understand the element of regular expression patterns, check the manual (you just need to scroll down a little bit).
http://www.php.net/manual/en/pcre.pattern.syntax.php

the lookahead construct is not explained there in detail, but it is pretty straightforward, take a look here if you want.