Checking for "iframe" (case insensitive) on website.

This code was written by WebSanity - web design and Internet Marketing.
If you have any problems with the script do let us know detect@websanity.co.uk (although, unfortunately, we can't promise to fix them for you!
If you use this code we'd appreciate a link to our website from your blog or somewhere, or a review on Google local (WebSanity, Huntingdon) - Thanks!

Ignoring jpg pdf zip psd doc gif swf xls file extensions.
Ignoring files over 1048576 bytes in size.
Ignoring files before 1 August 2009.
Possible flags are:
None - display all files [detect-signature.php]
detect_errors_only - Stop searching as soon as an error is found [detect-signature.php?detect_errors_only]
display_errors_only - Only list files in which signature is found [detect-signature.php?display_errors_only]
 
Detecting first error only
Virus signature found on website