Before switching to Laravel, I used to be a fan of CakePHP
I got a multi-lingual web app project in which we need to sanitize some timezones. I wrote it for my project then I proposed to include it in Laravel by filing a proposal (link). And happily got green signal from Taylor Otwell. I forked laravel/framework, made changes and filed a Pull Request here. Documentation for uses can be found here
Taylor Otwell merged my commits 🙂 Cheers !
So, if you are using Laravel > v4.2. It have 42 lines of code written by me 😛
Are you looking to contributing to Laravel? Here is the key.