Have you tried w3schools.com ?.I think they are one of the best online schools to learn all the PHP ropes.I hope they will be of great help to you. Regards.
http://it-ebooks.info/ there are lots of PHP PDF's. Please check it. http://it-ebooks.info/book/301/, this book will be very useful. If you want to learn PHP with practical applications then you can refer PHP Cookbook.
I recommend http://www.thenewboston.org. They got step-by-step video guides for PHP, C++, Java, Python etc. Good luck mate!
I recommend lynda.com if you don't mind paying a monthly subscription to learn otherwise there's the php.net site and phpacademy Youtube channel. Besides other than those suggestions you can pick up any Kindle eBooks covering PHP development on Amazon.com
There are many good resources available for learning PHP. If you prefer watching videos, then thenewboston.org has a php series which covers from basic. The best part is, its free. Lynda also provides courses on PHP. Nettuts provide a number of good tutorials about PHP, after you have some basic, you can try those and practice the concepts, which will give you better idea. If you enjoy reading a book, then I will recommend Apress Beginning PHP and MySQL, pick the latest edition of the book and start reading & coding.
What about Codecademy? Anyone know of training aids like theirs for PHP? I know they have a PHP section but I'm not sure how extensive it is, I do know I like their setup and it fits my learning style. Any suggestions appreciated.
PHP is recently added to Codecademy, so i haven't take a look yet, but if you like their other courses, most probably you will like their PHP tracks as well.
I can recommended you a best site for online web application tutorial which have already gotten a big popularity. Go to w3programmers.
I recommend http://www.learnphponline.com/ and http://www.w3schools.com/php/ for learning PHP online. All the basic information like, php errors, functions, scripts, security are in it. Also, there are lots of examples available to understand practically.