I wrote a php application for my website that really needs to work well and be as secure as possible. I'm a novice php programmer, so while my application seems to work well, there may be inefficiencies or security vulnerabilities. I feel that I should have someone look over my code before making the application publicly available, but I'm hesitant to just post it online because it handles some rather sensitive things.

Where can I find a competent, trustworthy, and relatively inexpensive php programmer who would be willing to review a few thousand lies of well-commented easy-to-read php code?

Thank you!