Untitled

<html>
<head>
    <title>Formularz</title>
    <meta charset="UTF-8">
</head>
<body>
<form method="POST" action="strona.php">
    Wiersz: <input type="text" name="row"><br>
    Kolumna: <input type="text" name="col"><br>
    <button type="submit">Wyślij</button>
</form>

<?php
   $row = isset($_POST["row"])?$_POST["row"]:"";
   $col = isset($_POST["col"])?$_POST["col"]:"";

   echo "<table>";
    for ($i=1; $i<=$row; $i++)
   {
       echo "<tr>";
        for ($j=1; $j<=$col; $j++)
       echo '<td>'.$i*$j.'</td>';
    echo "</tr>";
    }

    echo "</table>";

?>

</body>
</html>