"PHP was originally an abbreviation of Personal Home Page, but it now stands for the recursive initialism PHP: Hypertext Preprocessor. " — Wikipedia
php --version : Check PHP version php --help php -S localhost:8000 : Start built-in webserver on port 8000
PHP Global Variables
PHP variables start with $.
Pre-defined, global scope.
$GLOBALS, $_SERVER, $_REQUEST, $_POST, $_GET, $_FILE, $_ENV, $_COOKIE, $_SESSION
PHP Online IDE
MVC Frameworks for Building PHP Web Applications
>>> CodeIgniter
>>> CakePHP
>>> Zend
>>> Lavarel
>>> Symphony
>>> Yii