PHP Resources PHP is a web programming language that can be compiled into the Apache web server and with its persistent connections to MySQL it makes for a very popular and fast web programming environment. PHP Cheat Sheet https://websitesetup.org/php-cheat-sheet/ Documenting PHP phpDocumentator phpXref Joseph Vaughan’s favorite articles on PHP security http://www.linuxjournal.com/article.php?sid=6061 http://www.linuxjournal.com/article.php?sid=6559 Use @ to turn off warning error message on a given command MVC frameworks for PHP (things like Ruby-on-Rails) Laravel: https://laravel.com Cake: http://www.cakephp.org Symfony: http://www.symfony-project.com CodeIgniter: www.codeigniter.com Debian packages for bleeding-edge versions of PHP and other LAMP -related packages: http://www.dotdeb.org PHPunit – Unit Testing for PHP http://codepad.org/ – test snippets of code in PHP and many other languages.