(php) regexto remove comments but ignore occurances within strings
- by David
Hi there,
I am writing a comment-stripper and trying to accommodate for all needs here. I have the below stack of code which removes pretty much all comments, but it actually goes too far. A lot of time was spent trying and testing and researching the regex patterns to match, but I don't claim that they are the best at each.
My problem is that I also have situation where I have 'PHP comments' (that aren't really comments' in standard code, or even in PHP strings, that I don't actually want to have removed.
Example:
<?php $Var = "Blah blah //this must not comment"; // this must comment. ?>
What ends up happening is that it strips out religiously, which is fine, but it leaves certain problems:
<?php $Var = "Blah blah ?>
Also:
will also cause problems, as the comment removes the rest of the line, including the ending ?
See the problem? So this is what I need...
Comment characters within '' or "" need to be ignored
PHP Comments on the same line, that use double-slashes, should remove perhaps only the comment itself, or should remove the entire php codeblock.
Here's the patterns I use at the moment, feel free to tell me if there's improvement I can make in my existing patterns? :)
$CompressedData = $OriginalData;
$CompressedData = preg_replace('!/\*.*?\*/!s', '', $CompressedData); // removes /* comments */
$CompressedData = preg_replace('!//.*?\n!', '', $CompressedData); // removes //comments
$CompressedData = preg_replace('!#.*?\n!', '', $CompressedData); // removes # comments
$CompressedData = preg_replace('/<!--(.*?)-->/', '', $CompressedData); // removes HTML comments
Any help that you can give me would be greatly appreciated! :)
