PHP Algorithms

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A collection of common algorithms for practice or review

Getting Started

The best way to use these examples is to read through the tests to understand what's expected of each solution. Then read through the solution until you understand it. Better yet, comment out or remove the solution and try to get the tests passing yourself.

Follow these steps to get started:

1. Clone this repo
2. Run composer install to install the dependencies. If you don't have Composer yet, you can get it here.
3. Run bin/phpspec run to run the tests.
4. All tests are in the spec directory and solutions are located in src.
5. Once you understand whats going on, remove the solution code and try to get it working again on your own.
6. Go forth and conquer!

Other Languages

I've written these in a few different languages to fully understand how to different languages handle logic problems. Check out the others!

• JavaScript
• Ruby
• Python

Purpose

Being a self-taught developer, I built these problems for myself to learn and practice. I've posted them so others can benefit from the same practice. Also, if I've gotten anything wrong, I'm sure someone will let me know and then I'll get to learn again!

You can use these to prepare for interviews, bootcamp prep or just for fun.

Just remember:

1. Read through the example.
2. Understand what each line of code is doing.
3. Try it yourself and get the tests passing.
4. Repeat!

Learn More

Here are some other resources useful for learning this kind of stuff.

Curriculum

• Free Code Camp
• Technical Interview Course by Udacity
• App Academy Prepwork

Practice Challenges

• Exercism.io
• Project Euler
• Code Wars
• Code Fights

Contribute

If you have trouble running the tests, want to add a new problem or correct something that's not quite right, please open an issue or submit a pull request.