Print Inversions pairs in array in php

Php program for Print Inversions pairs in array. Here more solutions.

<?php
/*
  Php program for
  Display inversions pairs in array
*/
class InversionPairs
{
	// Print the all inversion pairs in given array
	public	function printInversionPair($arr, $size)
	{
		if ($size <= 1)
		{
			return;
		}
		// Outer loop
		for ($i = 0; $i < $size; ++$i)
		{
			// Inner loop
			for ($j = $i + 1; $j < $size; ++$j)
			{
				if ($arr[$i] > $arr[$j])
				{
					// When element of i is 
					// greater than element of j
					// Print inversion pair
					echo "(".($arr[$i]).
					",".($arr[$j]).
					")\n";
				}
			}
		}
	}
	public static function main()
	{
		$task = new InversionPairs();
		// Define array elements
		$arr = array(1, 7, 6, 4, 5, 9, 8);
		// Get the number of array elements
		$size = count($arr);
		// Display inversion pair result
		$task->printInversionPair($arr, $size);
	}
}
InversionPairs::main();

Output

(7,6)
(7,4)
(7,5)
(6,4)
(6,5)
(9,8)