Merge Sort in Php

Welcome to the Merge Sort in Php page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

<?php
function merge_sort($my_array)
{
    if (count($my_array) == 1) {
        return $my_array;
    }

    $mid = count($my_array) / 2;
    $left = array_slice($my_array, 0, $mid);
    $right = array_slice($my_array, $mid);
    $left = merge_sort($left);
    $right = merge_sort($right);
    return merge($left, $right);
}
function merge($left, $right)
{
    $res = array();
    while (count($left) > 0 && count($right) > 0) {
        if ($left[0] > $right[0]) {
            $res[] = $right[0];
            $right = array_slice($right, 1);
        } else {
            $res[] = $left[0];
            $left = array_slice($left, 1);
        }
    }
    while (count($left) > 0) {
        $res[] = $left[0];
        $left = array_slice($left, 1);
    }
    while (count($right) > 0) {
        $res[] = $right[0];
        $right = array_slice($right, 1);
    }
    return $res;
}

if (empty($argv[1])) {
    exit('Usage: please provide a list of at least two integers to sort in the format "1, 2, 3, 4, 5"');
}

$test_array = array_map('intval', explode(',', $argv[1]));
$array_size = count($test_array);

if ($array_size <= 1) {
    exit('Usage: please provide a list of at least two integers to sort in the format "1, 2, 3, 4, 5"');
}

echo implode(', ', merge_sort($test_array)) . "\n";

Merge Sort in Php was written by:

• Ankit kumar
• Jeremy Grifski
• Parker Johansen

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

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