Basic PHP Question

[TutorialNinjas]

Is there a way i can have it open up a file and search for a string?

[calorie]

Idea: place file into string using file_get_contents (http://www.php.net/manual/en/function.file-get-contents.php) and then use preg_match (http://www.php.net/manual/en/function.preg-match.php) to search for substring.