Addition & multiplication of two matrices in PHP

Addition & multiplication of two matrices in PHP

15CSL77
WEB TECHNOLOGY LABORATORY WITH MINI PROJECT

program

Write the PHP programs to do the following:   

1. Find the transpose of a matrix. 
2. Multiplication of two matrices. 
3. Addition of two matrices.

Basic Concepts

If a[i][j] and b[i][j] is two matrix then:

1. Transpose of a[i][j] will be a[j][i]
2. Addition of matrix will be a[i][j]+b[i][j]
3. Mutiplication :- for multiplication we cant multiply directley we have to create new matrix supose result[i][j]=0 which will be the result of product of two matrix if                          Result[i][j]+=a[i][k]*b[i][k]

Addition & multiplication of two matrices in PHP Code

<?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/>"; } 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/>"; } 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/>"; } ?>

Output:

Addition & multiplication of two matrices in PHP output

Addition & multiplication of two matrices in PHP Vide Tutorial