Member Avatar for KBL

Hey this is a code to print the times table of a particular number entered by a user, The thing is I want to validate the form so that it checks to see if what is entered is numeric, and ranges from 1 to 12 if not I want it to display an error.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
 <form method="post" "<?php echo $PHP_SELF;?>"> 
 Enter Number:<input type="text" name="Number" />
  
 <input type="submit" value="Show Time table"/> 
  
 </form> 

</body>
</html>
<?php
if (array_key_exists('Number',$_POST)) 
{
$numbers=range(1,12);
$Number = $_POST['Number'];
foreach($numbers as $times)
{
    echo '<tr>';
          
         $output = $Number * $times;      
        echo "<tr style='text-align: center'>$Number x $times = $output<br>
</tr>";
     echo '</tr>';
    echo '</tr>';
	}
}
 ?>
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  • Latest Post Latest Post by colweb
Member Avatar for colweb 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
		<title>Untitled Document</title>
	</head>
	
	<body>
		<form method="post" action="<?php echo $PHP_SELF;?>">
			Enter Number:<input type="text" name="Number" />
			
			<input type="submit" value="Show Time table"/>
			
		</form>
		
	</body>
</html>
<?php
$numbers=range(1,12);
$Number = $_POST['Number'];
if ($Number < 1 or $Number > 12) {
	// insert code to display an error
}
else {
	foreach($numbers as $times) {
		echo '<tr>';

		$output = $Number * $times;
		echo "<tr style='text-align: center'>$Number x $times = $output<br>
			</tr>";
		echo '</tr>';
		echo '</tr>';
	}
}
?>

This should do it. A form also needs an action. As you can see, there is no need to test for numeric input. If you enter anything else no output is generated.

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