Multiplication of Two Matrix in PHP of Same Dimensions using For loop

Multiplication of two matrix in PHP of same dimensions using for loop. In this article, you will learn how to make multiplication of two matrix in php of same dimensions using for loop.

Matrix Multiplication Formula

Source Code

<?php
// Multiplication of Two Matrix in PHP of Same Dimensions using For loop

$x = array (
    array (32, 54, 65),
    array (45, 54, 65),
    array (45, 32, 65),
    array (45, 32, 54)
);

$y = array (
    array (54, 24, 76),
    array (90, 24, 76),
    array (90, 54, 76),
    array (90, 54, 24)
);

// $x & $y - To store the two matrix elements of 4 x 3 dimensions
$m = array ();

// $m - To store multiplication of matrices
echo "-----The multiplication of the matrices is-----\n\n";

// It's the calculation of matrices's multiplications
for ($i = 0; $i < count ($x); $i++) {
    $m[] = array ();
    for ($j = 0; $j < count ($x[$i]); $j++) {
        $m[$i][] = 0;
        for ($k = 0; $k < count ($x[$i]); $k++) {
            $m[$i][$j] += $x[$i][$k] * $y[$k][$j];
        }
    }
}

// This will display matrices' outputs
for ($i = 0; $i < count ($x); $i++) {
    
    echo "\t";
    for ($j = 0; $j < count ($x[$i]); $j++) {
        echo $m[$i][$j]."\t";
    }
    echo "\n";
}

?>

Run Program

Output