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php Programming Exercies

PHP Searching and Sorting Algorithm: Bogo sort

PHP Searching and Sorting Algorithm: Exercise-14 with Solution

Write a PHP program to sort a list of elements using Bogo sort.

In computer science, bogosort is a particularly ineffective sorting algorithm based on the generate and test paradigm. The algorithm successively generates permutations of its input until it finds one that is sorted. It is not useful for sorting but may be used for educational purposes, to contrast it with other more realistic algorithms.

Sample Solution :

PHP Code :

<?php
function issorted($list)
{
    $cnt = count($list);
    for($j = 1; $j < $cnt; $j++)
    {
        if($list[$j-1] > $list[$j])
		{
                return false;
        }
    }
    return true;
}
function bogo_sort($list)
{
    do
    {
        shuffle($list);
    }
    while(!issorted($list));
    return $list;
}
$test_array = array(100, 0, 2, 5, -1, 4, 1);
echo "\nOriginal Array :\n";
echo implode(', ',$test_array );
echo "\nSorted Array :\n";
echo implode(', ',bogo_sort($test_array)). PHP_EOL;
?>

Sample Output:

Original Array :                                                    
100, 0, 2, 5, -1, 4, 1                                              
Sorted Array :                                                      
-1, 0, 1, 2, 4, 5, 100 

Flowchart :

Flowchart: PHP - program of Bogo sort

PHP Code Editor:


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