Question

How to get matrix size in PHP

Answer 1

$matrix = [
    [2, 0, 5, 9],
    [0, 4, 0, 3],
    [0, 8, 0, 1]
];

// Get the number of rows
$rows = count($matrix);

// Get the number of columns
$columns = count($matrix[0]);

$total_cells = $rows * $columns;

echo "Matrix size: {$rows} rows x {$columns} columns\n";
echo "Total Cells: {$total_cells}\n";



/*
run:

Matrix size: 3 rows x 4 columns
Total Cells: 12

*/

 

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