<?php

$rows = 10;
$cols = 10;

echo '<table border="2">';

for ($tr=1; $tr<=$rows; $tr++){
    echo '<tr>';
    for ($td=1; $td<=$cols; $td++){
        echo '<td>'. $tr*$td .'</td>';
    }
    echo '</tr>';
}

echo '</table>';

?>