Selection sort in php

Php program for Selection sort. Here more solutions.

<?php
/*
  Php program for selection sort
*/
class MySort
{
	// Swap the array element
	public	function swap(&$arr, $x, $y)
	{
		// x and y are index of array
		$temp = $arr[$x];
		$arr[$x] = $arr[$y];
		$arr[$y] = $temp;
	}
	public	function selectionSort(&$arr, $n)
	{
		$min = 0;
		// Execute loop from 0..n
		for ($i = 0; $i < $n; ++$i)
		{
			// Get current index
			$min = $i;
			for ($j = $i + 1; $j < $n; ++$j)
			{
				if ($arr[$min] > $arr[$j])
				{
					// Get the minimum element index
					$min = $j;
				}
			}
			if ($i != $min)
			{
				// Swap minimum element at i index
				$this->swap($arr, $i, $min);
			}
		}
	}
	// Display array elements
	public	function display($arr, $n)
	{
		for ($i = 0; $i < $n; ++$i)
		{
			// Display element value
			echo "  $arr[$i]";
		}
		echo "\n";
	}
	public static function main()
	{
		$task = new MySort();
		// Array of integer elements
		$arr = array(8, 2, 3, 8, 1, 3, 73, 121, 
                     54, 23, 84, 13, 67, 23, 52);
		// Get the size of array
		$n = count($arr);
		echo " Before Sort :\n";
		$task->display($arr, $n);
		// Test
		$task->selectionSort($arr, $n);
		echo " After Sort :\n";
		$task->display($arr, $n);
	}
}
MySort::main();

Output

 Before Sort :
  8  2  3  8  1  3  73  121  54  23  84  13  67  23  52
 After Sort :
  1  2  3  3  8  8  13  23  23  52  54  67  73  84  121