Expert in PHP to check cron job script by fattahaabdul

I need some one who is very good in PHP and has written cron job script in past. I need them to check- 1. Problem in Script. 2. Security issues in script. 3. How to resolve it 4. Rewrite in best and effective way… (Budget: $10 – $30 USD, Jobs: Linux, MySQL, Network Administration, PHP)