Helpful Youtube channels
- https://www.youtube.com/user/LevelUpTuts/search?query=drupal+7
- https://www.youtube.com/channel/UCTTTZ2DGXmrm7E48nJ5K5kQ/playlists
- https://www.youtube.com/user/yaworsk1/search?query=drupal
- https://www.youtube.com/user/codekarate/playlists
Free - ish
- https://drupalize.me
- https://training.acquia.com/free-training
- https://buildamodule.com/
- http://www.lynda.com/search?q=drupal%207
Paid for training
- https://www.drupal.org/training/united-states
- http://librarylinknj.org/discounts/masteringdrupal7
- https://www.ostraining.com/class/d7-beginner/
- http://training.figleaf.com/Courses/phpdrupal.cfm
- https://www.zivtech.com/services/training
- https://www.packtpub.com/web-development
PHP / Symfony
- https://training.sensiolabs.com/en/courses?q=&from=&to=
- https://teamtreehouse.com/library/topic:php
- http://www.zend.com/en/services/training
- https://www.lynda.com/PHP-training-tutorials/282-0.html
- https://www.udemy.com/the-ultimate-php-training-course/
- https://www.codecademy.com/learn/php
- http://www.w3schools.com/php/
- https://knpuniversity.com/screencast/symfony-fundamentals
Misc
- https://curious.com/npr
- https://www.quora.com/What-are-the-best-resources-to-learn-Drupal-7
- https://www.safaribooksonline.com/
- http://codekarate.com/
Docs
great contextual filter view guide http://redcrackle.com/blog/adding-contextual-filter-view-drupal-8