Extract php code from a php file using RegEx

I am trying to extract php code from a php file (php file also contains html, css and javascript code). I am using the following regex for this
but this doesn't cater quotation marks (single and double quotes) and comments, i mean how can i skip php tags inside a string (and comments). Please have a look at the following code
I need a regular expression that extracts the two blocks of PHP code from sample code

re: Extract php code from a php file using RegEx

well, if I try, the RegEx gets it all. your problem is that it is extremely difficult to determine, whether a "?>" is a comment, a string or a processing instruction (i.e. you need to kind of parse the string).

maybe it's easier to do the reverse and not extract what's between ?> and <? (though this may also fail in special circumstances)

re: Extract php code from a php file using RegEx

Found a solution at http://regexadvice.com/forums/thread/53756.aspx

The regex below is what i needed
<\?(\x22[^\x22]*?\x22|\x27[^\x27]*?\x27|/\*.*?\*/|.)*?\?>

re: Extract php code from a php file using RegEx

are you sure? the RegEx fails for me (that is, it doesn't get the whole first block, only chunks).

translated into characters… all that's a string, a comment or any char