Only allow numbers in form entry

[smashing]

I know this is probably simple, but I'm still new to PHP so....
I have a form where I ask users to enter a number - if they enter any character then I want them to get a different message. How do I do this ?

 

[sleipnir214]

You have two choices.

You can have JavaScript check the well-formedness of the input at the client side, or have the user submit the form and have PHP do it.

The question "How do I do it in JavaScript?" can best be answered in the JavaScript forum.

For PHP, one possibility is preg_match() (

http://www.php.net/manual/en/function.preg-match.php).

Want the best answers? Ask the best questions:

http://www.catb.org/~esr/faqs/smart-questions.html

TANSTAAFL!

 

[Bastien]

use the is_numeric() function like this:

if (!is_numeric($data)){
echo "you are a bad boy...numbers only";
}else{
//do something else
} Bastien

There are many ways to skin this cat,
but it still tastes like chicken