program8b.php

<?php
	$a = array(array(1,2,3),array(4,5,6),array(7,8,9));
	$b = array(array(7,8,9),array(4,5,6),array(1,2,3));
	$m=count($a);
	$n=count($a[2]);
	$p=count($b);
	$q=count($b[2]);
	echo "the first matrix :"."<br/>";
	for ($row = 0; $row < $m; $row++) 
	{
		for ($col = 0; $col < $n; $col++)
			echo " ".$a[$row][$col];
		echo "<br/>";
	}
	echo "the second matrix :"."<br/>";
	for ($row = 0; $row < $p; $row++) 
	{
		for ($col = 0; $col < $q; $col++)
			echo " ".$b[$row][$col];
		echo "<br/>";
	}
	echo "the transpose for the first matrix is:"."<br/>";
	for ($row = 0; $row < $m; $row++) 
	{
		for ($col = 0; $col < $n; $col++)
			echo " ".$a[$col][$row];
		echo "<br/>";
	}
	if(($m===$p) and ($n===$q)) 
	{
		echo "the addition of matrices is:"."<br/>";
		for ($row = 0; $row < 3; $row++) 
		{
			for ($col = 0; $col < 3; $col++)
				echo " ".$a[$row][$col]+$b[$row][$col]." ";
			echo "<br/>";
		}
	}
	if($n===$p)
	{
		echo " The multiplication of matrices: <br/>";
		$result=array();
		for ($i=0; $i < $m; $i++) 
		{
			for($j=0; $j < $q; $j++)
			{
				$result[$i][$j] = 0;
				for($k=0; $k < $n; $k++)
					$result[$i][$j] += $a[$i][$k] * $b[$k][$j];
			}
		}
		for ($row = 0; $row < $m; $row++) 
		{
			for ($col = 0; $col < $q; $col++)
				echo " ".$result[$row][$col];
			echo "<br/>";
		}
	}
?>