Quick solution to the Two Sum Problem in PHP

twosum.php

<?php
// https://leetcode.com/problems/two-sum/

function solution($nums, $target) {
	$memo = array();
	for ($i = 0; $i < count($nums); $i++) {
		$key = $target - $nums[$i];
		if (array_key_exists($nums[$i], $memo)) {
			return array($memo[$nums[$i]], $i);
		} else {
			$memo[$key] = $i;
		}
	}
	return -1;
}

function test_case_one() {
	$nums = array(2,7,11,15);
	$target = 9;
	
	$expected = array(0,1);
	
	$rv = solution($nums, $target);
	print_r($rv);
	if ($expected == $rv) {
		print("\nTrue\n");
	} else{
		print("\nFalse\n");
	}
}

test_case_one();
?>