See these links/courses for learning PHP:

PHP 5 Tutorials
<https://w3schools.com/php/>

A simple tutorial
<https://php.net/manual/en/tutorial.php>

Free Course: Fundamental Programming Concepts
<https://codecademy.com/learn/php>

See these links/courses for learning PHP:

PHP Official Documentation (select a language on the page)
<http://php.net/docs.php>

Learn PHP the right way (online free book)
<http://www.phptherightway.com>

PHP 5 Tutorials
<https://w3schools.com/php/>

A simple tutorial (good introduction)
<https://php.net/manual/en/tutorial.php>

Free Course: Fundamental Programming Concepts
<https://codecademy.com/learn/php>

Codeschool's PHP courses
<https://www.codeschool.com/search?utf8=%E2%9C%93&query=php>

Beginner PHP at Treehouse
<https://teamtreehouse.com/tracks/beginner-php>

Intermediate PHP at Treehouse
<https://teamtreehouse.com/tracks/intermediate-php>

PHP 5: Interactive tutorial
<http://www.tutorialspoint.com/php/>


See these resources for learning what's new in PHP 7:

PHP 7: Up and running
<https://laracasts.com/series/php7-up-and-running/episodes/1>

PHP 7: Interactive tutorial
<http://www.tutorialspoint.com/php7/>

Update the PHP help file resource list.
Update the PHP help file resource list.

 A user 'expected more' when he ran our php help command. Well, I'LL GIVE HIM MORE.