Extract php code from a php file using RegEx

108 100+

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

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<\?[\w\W]*?\?>

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

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<?php

    include("db.php");

    $name=$_REQUEST['name'];

    /* the regular expression to extract code inside php tags (i.e  <? and ?>) is  */

    $str='|<\?[\w\W]*?\?>|';

    # The regex can also be written using double quotes

    $str="|<\?[\w\W]*?\?>|";

?>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>
 
<title>Sample PHP File</title>

</head>
 
<body>

<?="<h1>Some output from PHP?>

</body>

</html>

I need a regular expression that extracts the two blocks of PHP code from sample code

Jun 8 '09 #1

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4057

Dormilich

8,658

Expert Mod 8TB

@rizwan6feb
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)

Jun 11 '09 #2

rizwan6feb

108

100+

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

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

Jun 12 '09 #3

Dormilich

8,658

Expert Mod 8TB

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

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<\?("[^"]*?"|'[^\']*?'|/\*.*?\*/|.)*?\?>

Jun 12 '09 #4

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Extract php code from a php file using RegEx

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