Write a PHP Program to generate the multiplication of matrix.

Write a PHP Program to generate the multiplication of matrix.

<?php

$p=array();

$p[]=array(1,3,-4);

$p[]=array(1,1,-2);

$p[]=array(-1,-2,5);

$q=array();

$q[]=array(8,3,0);

$q[]=array(3,10,2);

$q[]=array(0,2,6);

echo"matrix 1<br/>";

echoMatrix(3,$p);

echo"<br/>";

echo"matrix 2<br/>";

echoMatrix(3,$q);

echo"<br/>";

$r=matrixMultiply(3,$p,$q);

echo"result of matrix multiply<br/>";

echoMatrix(3,$r);

function echoMatrix($N,$r)

{

          for($i=0;$i<$N;$i++)

          {

                   for($j=0;$j<=$N;$j++)

                   {

                             if($j==$N)

                             {

                                      echo"<br>";

                             }

                             else

                            

{

                                      echo $r[$i][$j];

                             }

                             if($j<($N-1))

                             {

                                      echo",";

                             }

                   }

          }

}

function matrixMultiply($N,$p,$q)

{

          //init result

          $r=array();

          for($i=0;$i<$N;$i++)

          {

$t=array();

for($j=0;$j<$N;$j++)

{

          $t[]=0;

}

$r[]=$t;

}

//do the matrix multiply

for($i=0;$i<$N;$i++)

{

for($j=0;$j<$N;$j++)

{

$t=0;

for($k=0;$k<$N;$k++)

{

          $t+=$p[$i][$k]*$q[$k][$j];

}

$r[$i][$j]=$t;

}

}

//return result

return $r;

}

?>

OUTPUT:-

matrix 1
1,3,-4
1,1,-2
-1,-2,5

matrix 2
8,3,0
3,10,2
0,2,6

result of matrix multiply
17,25,-18
11,9,-10
-14,-13,26