Question

How to create an M x N matrix with random numbers in PHP

Answer 1

function printMatrix($matrix) {
    $rows = count($matrix);
    $cols = count($matrix[0]);
    
    for ($i = 0; $i < $rows; $i++) {
        for ($j = 0; $j < $cols; $j++) {
            printf("%4d", $matrix[$i][$j]);
        }
        echo "\n";
    }
}
 
function generateRandomMatrix($rows, $cols)  {
    $matrix = array_fill(0, $rows, array_fill(0, $cols, 0));
     
    for ($i = 0; $i < $rows; $i++) {
        for ($j = 0; $j < $cols; $j++) {
            $matrix[$i][$j] = rand(1, 100);
        }
    }
    return $matrix;
}
         
$matrix = generateRandomMatrix(4, 5);
 
printMatrix($matrix);




/*
run:

  42  93  55  29   3
  13   9  30  49   6
  70  49  70  33   7
  43  17  11  47  73

*/

 

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