php1

<?php

   // TODO: Implement meh

        if(isset($_POST))
        {
                $rows=$_POST['rows'];
                $columns=$_POST['columns'];
                $operations=$_POST['operation'];
                $counterColumns = 0;
                $counterRows = 0;


                if(is_numeric($rows) == false || $rows<0)
                {
                        echo "Invalid row input.";
                }


        else
                {
                        if($operations == 'multiplication')
                        {
                                echo "This is the ".$columns." x ".$rows." multiplication table.";
                        }
                        else
                        {
                                echo "This is the ".$columns." + ".$rows." addition table.";
                        }

                        echo "<table border=\"1\">";
                        //for loop for table rows

                        for($counterRows; $counterRows <= $rows; $counterRows++)
                        {
                                echo "<tr>";
                                for($counterColumns = 0; $counterColumns <= $columns; $counterColumns++)
                                {
                                        echo "<td>";

                                        if($operations == 'multiplication')
                                        {
                                                if($counterRows == 0)
                                                {
                                                        echo $counterColumns;
                                                }
                                                else if($counterColumns == 0)
                                                {
                                                        echo $counterRows;
                                                }
                                                else
                                                {
                                                        $calc= $counterRows * $counterColumns;
                                                }
                                        }
                                        else
                                        {
                                                $calc=$counterRows + $counterColumns;
                                        }

                                        echo(htmlspecialchars($calc));
                                        echo "</td>";
                                }
                                echo "</tr>";


                        }
                echo "</table>";
                }
        }
?>