applied misc. code optimisation

[jorijn]

Hi!

I wanted to contribute to this project. I decided the least I could do is apply some healthy PHP standards.

Upon reviewing, you'll see each change shouldn't really introduce any risk or provide any significant impact to your project. It's just basic stuff like proper quotation, in the end that'll help out a few nanoseconds with performance.

If you have any questions, hit me up.

Jorijn