PHP Reference

The standard reference for PHP is the PHP Manual, at: http://us.php.net/manual/en/index.php.

PHP Manual is one of the best written manual among IT industry documents. It is clear, to the point, practical, easy to locate functionalities, and lots of examples.

The PHP website also features a easy way to lookup functions or keywords thru the url. For example, if you want to lookup documentation for the “echo” keyword, just append it to the url 〔http://us.php.net/〕. Example: http://us.php.net/echo. The keyword needs not to be a function, but any general search term. For example, if you need to lookup the syntax for heredoc: http://us.php.net/heredoc.