Nth Prime in PHP
Given a number n, determine what the nth prime is.
1  exercism fetch php nthprime

Nth Prime
Given a number n, determine what the nth prime is.
By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.
If your language provides methods in the standard library to deal with prime numbers, pretend they don't exist and implement them yourself.
Running the tests

Go to the root of your PHP exercise directory, which is
<EXERCISM_WORKSPACE>/php
. To find the Exercism workspace run1
% exercism debug  grep Workspace

Get PHPUnit if you don't have it already.

Execute the tests:
1
% ./phpunit.phar nthprime/nthprime_test.php
Source
A variation on Problem 7 at Project Euler http://projecteuler.net/problem=7
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.