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

<?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";
}

?>