如何删除注释行以//开头，而不是像http：//使用preg_replace的URL

Question

I need to remove the comment lines from my code.

preg_replace('!//(.*)!', '', $test);

It works fine. But it removes the website url also and left the url like http:

So to avoid this I put the same like preg_replace('![^:]//(.*)!', '', $test);

It's work fine. But the problem is if my code has the line like below

$code = 'something';// comment here

It will replace the comment line with the semicolon. that is after replace my above code would be

$code = 'something'

So it generates error.

I just need to delete the single line comments and the url should remain same.

Please help. Thanks in advance

Answer 1

try this

preg_replace('@(?<!http:)//.*@','',$test);

also read more about PCRE assertions http://cz.php.net/manual/en/regexp.reference.assertions.php