[SOLVED] Integer Validation no signs

[ballouta]

Hi

i have the vartiable credits posted from an html form.

after submission, this query runs:

 

$query = " UPDATE `rescus` SET `credits` = credits-$newcredits WHERE `customer` = '" . $_SESSION['username'] . "' ";

 

If someone enter in teh html form -5 for credits, it will make wrong result.

How do i validate the credits entered so it doesn't contain +, -,* or / ?

 

thank you

 

[balistic]

is negative credits allowed, or should they always be positive?

[ballouta]

it is always positive

[shatner]

if ($newcredits > 0){

$query = " UPDATE `rescus` SET `credits` = credits-$newcredits WHERE `customer` = '" . $_SESSION['username'] . "' ";

}

[balistic]

nah, a better way to do it would be to just run the value of credits through the absolute function

 

$query = " UPDATE `rescus` SET `credits` = ".abs($credits)."-$newcredits WHERE `customer` = '" . $_SESSION['username'] . "' ";

 

that way if it is positive or a negative number it will come back as a positive

 

http://au.php.net/abs