VTU CSE LABS: WT 8B - PHP - MATRIX OPERATIONS

8. WRITE THE PHP PROGRAMS TO DO THE FOLLOWING:

A. IMPLEMENT SIMPLE CALCULATOR OPERATIONS.
B. FIND THE TRANSPOSE OF A MATRIX.
C. MULTIPLICATION OF TWO MATRICES.
D. ADDITION OF TWO MATRICES.

SOLUTION 1

Requires XAMPP control panel for Solution 1

If xampp is in the system, save the program in C:\xampp\htdocs (start apache in xampp control panel) & Open Google Chrome & type http://localhost/prog8b.php

prog8b.php

<!DOCTYPE html>
<html>
<body>
<?php
function pr($a){
foreach ($a as $b) {
foreach ($b as $c) {
echo $c ." ";
}echo " ";
}echo " ";
}
$a = [[1,2,3],[4,5,6],[7,8,9]];
$b = [[7,8,9],[4,5,6],[1,2,3]];
echo "First Matrix : " ; pr($a);
echo "Second Matrix : "; pr($b);
for ($i=0; $i < 3; $i++)
for ($j=0; $j < 3; $j++)
$c[$i][$j] = $a[$j][$i];
echo "Transpose Of First Matrix : "; pr($c);
for ($i=0; $i < 3; $i++)
for ($j=0; $j < 3; $j++)
$c[$i][$j] = $a[$i][$j] + $b[$i][$j];
echo "Addition Of Two Matrix : "; pr($c);
for ($i=0; $i < 3; $i++)
for ($j=0; $j < 3; $j++){
$c[$i][$j] = 0;
for ($k=0; $k < 3; $k++)
$c[$i][$j] += $a[$i][$k] * $b[$k][$j];
}
echo "Multiplication Of Two Matrix : "; pr($c);
?>
</body>
</html>

STEPS :( click on image to zoom )

OUTPUT :( click on image to zoom )

SOLUTION 2

If no xampp in the system, save the program in C:\Program Files\Apache Group\Apache 2\htdocs & Open Google Chrome & type http://localhost/prog8b.php

prog8b.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 :"." ";
for ($row = 0; $row < $m; $row++) {
for ($col = 0; $col < $n; $col++)
echo " ".$a[$row][$col];
echo " ";
}
echo "the second matrix :"." ";
for ($row = 0; $row < $p; $row++) {
for ($col = 0; $col < $q; $col++)
echo " ".$b[$row][$col];
echo " ";
}
echo "the transpose for the first matrix
is:"." "; for ($row = 0; $row < $m; $row++) {
for ($col = 0; $col < $n; $col++)
echo " ".$a[$col][$row];
echo " ";
}
if(($m===$p) and ($n===$q)) {
echo "the addition of matrices is:"." ";
for ($row = 0; $row < 3; $row++) {
for ($col = 0; $col < 3; $col++)
echo " ".$a[$row][$col]+$b[$row][$col]."
"; echo " ";
}
}
if($n===$p){
echo " The multiplication of matrices: ";
$result=array();
for ($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 " ";
}
}
?>

OUTPUT :

the first matrix:
1 2 3
4 5 6
7 8 9

the second matrix:
7 8 9
4 5 6
1 2 3

the transpose of the first matrix:
1 4 7
2 5 8
3 6 9

the addition of matrices is:
8 10 12
8 10 12
8 10 12

the multiplication of matrices:
18 24 30
54 69 84
90 114 138

VTU CSE LABS

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Saturday, August 3, 2019

WT 8B - PHP - MATRIX OPERATIONS

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