CODEWITHSUNDEEP
phpregexsearch
Nikita 웃
Nikita 웃

Reputation: 2060

RegEx - Exclude Commented PHP Code Block

I am using a file search utility (FileSeek) with regex content search. The contents I am searching for is basically any un-commented lines that have while...each in them. I have successfully managed to exclude inline commented lines such as // while (list($key, $value) = each($_GET)) with this regex: ^(?:(?!\/\/).)*while.+[\s=(]each[\s(]

Demo

How can I improve the regex search (make it even more restrictive) to exclude search results from commented lines and commented code blocks \* *\ such as:

/*
  while (list($key, $value) = each($_GET))
*/

Or

/* some code
  while (list($key, $value) = each($_GET))
  some code
*/

In other words, how can I modify my regex to also completely skip/ignore everything inside a commented php block: \* *\ instead of picking up results that are also inside it?

EDIT: Just for reference, here is an example that does the opposite, ie. matches only commented code.

Upvotes: 5

Views: 296

Answers (1)

bobble bubble
bobble bubble

Reputation: 18515

You can use (*SKIP)(*FAIL) to skip parts together with this trick if supported by your tool.

(?:(?<!:)\/\/.*|\/\*[\s\S]*?\*\/)(*SKIP)(*F)|while.+?[\s=(]each[\s(]

See demo at regex101. This is just a quick try, you need to adjust the pattern to your needs.

If this is not supported by your tool, you can try to add another lookahead to your pattern.

^(?:(?!\/\/).)*while.+[\s=(]each[\s(](?!(?:(?!\/\*)[\S\s])*?\*\/)

With m multiline-mode turned on and s single line mode turned off.

Another demo at regex101

Or without any flags and used [^\n] instead of \N for compatibility.

(?<![^\n])(?:(?!\/\/)[^\r\n])*?while[^\r\n]+[\s=(]each[\s(](?!(?:(?!\/\*)[\S\s])*?\*\/)

One more demo at regex101

Upvotes: 2

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