Previous limit of 750 chars enclosed in php tags in a single line was too low... false positives were being triggered by a w3 total cache file because some guy decided to print one gigantic long message in a single line.
Raising to 1100
One common tactic is to shove all of your PHP code into a single line, often contained within its own PHP tags, and drop it into any .php file that you want. This pattern should detect if more than 750 characters are contained within PHP tags on a single line.
