PHP Program to find Matrix Multiplication

Find Matrix Multiplication

In the following example, we will multiply the two given matrices (two-dimensional arrays).

Example

PHP Compiler
<?php $arr1 = array( array(1, 1, 1), array(1, 1, 1), array(1, 1, 1), ); $arr2 = array( array(2, 2, 2), array(2, 2, 2), array(2, 2, 2), ); $arr3 = array( array(0, 0, 0), array(0, 0, 0), array(0, 0, 0), ); echo "Matrix A (3 x 3): <br>"; for($i=0; $i<3; $i++) { for($j=0; $j<3; $j++) echo $arr1[$i][$j] . " "; echo "<br>"; } echo "<br>Matrix B (3 x 3): <br>"; for($i=0; $i<3; $i++) { for($j=0; $j<3; $j++) echo $arr2[$i][$j] . " "; echo "<br>"; } for($i=0; $i<3; $i++) { for($j=0; $j<3; $j++) { for($k=0; $k<3; $k++) $arr3[$i][$j] = $arr3[$i][$j] + $arr1[$i][$k] * $arr2[$k][$j]; } } echo "<br>Matrix Multiplication (A x B): <br>"; for($i=0; $i<3; $i++) { for($j=0; $j<3; $j++) echo $arr3[$i][$j] . " "; echo "<br>"; } ?>

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