We need to ensure that all of our PHP files are hacker proof. We have 5 medium sites and 8 small websites that need to be checked. PHP must be reviewed to ensure that no hacker or previous programmer can get into the PHP to force it to show up as errors or to cause any type of downtime to our websites.
This project is to be done in 1 business day, as this is a very urgent matter.
Serious replies only.