The Symfony documentation
SecLists is the security tester's companion. It's a collection of multiple types of lists used during security assessments, collected in one place. List types include usernames, passwords, URLs, sensitive data patterns, fuzzing payloads, web shells, and many more.
PHP Language Specification
SQLI labs to test error based, Blind boolean based, Time based.
Examples of using each Illuminate component in non-Laravel applications
Source files for the 30 days free tutorials challenge as part of the Make Professional 2d Games with Godot Kickstarter
Learn You PHP! - An introduction to PHP's core features: i/o, http, arrays, exceptions and so on.
Clean Code concepts adapted for PHP