PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Want to learn more about the Hypertext Preprocessor? Go to the main source of the information - php.net!
Full Link: http://us.php.net/
Learn the way of the web and create your own blog with Udacity.
Full Link: https://www.udacity.com/course/cs253
Learn the basics of PHP with Codecademy's PHP track.
Full Link: http://www.codecademy.com/tracks/php
Learn PHP for free with TuxRadar's PHP programming tutorial!
Full Link: http://www.tuxradar.com/practicalphp
This is a very simple and possibly outdated method of learning procedural PHP programming. It's great for absolute beginners.
Full Link: http://www.tizag.com/phpT/