I'm skilled in PHP, MySQL, CSS/JS, AJAX and develop web applications, scripts and tools for more than 10 years now.
My full time job is for a web hosting company, which taught me a great deal of server-side tricks, as well as it gave me a vast knowledge of the most used control panels such as cPanel or Plesk for example.
I often have to clean hacked websites from malicious code and as such 'web security' practices are not a secret to me.