[SOLVED] Only allow numbers in form

[aQ]

Hello!

 

Are there any functions that can be used to delete all other characters than number in a form or a variable?

[desithugg]

Well I don't know about deleting but you can use

is_int($num); to check if the number is an integer

[aQ]

What about minus or plus? Will it show as an integer anyway?

[taith]

or... is_numeric()

[aQ]

If I use "is_numeric()", it accepts + and -. If I use "is_int($num)" it doesn't any numbers + or -.

 

Any other ways?  ???

[taith]

declaring the string an int...

$string=213hlsdf34;

$int=(INT)$string;

[Orio]

If you want to delete all of the non-numeric chars, use:

$only_nums = preg_replace("/[^0-9]/", "", $string);

 

If you only want to validate the string is numeric I'd use:

<?php
if(!is_numeric($num) || !preg_match("/^[0-9]+$/", $num))
{
//Invalid
}else{
//Valid
}
?>

 

Orio.

[aQ]

I'm feeling stupid now...

 

To ask in another way:

Are there any way that I can search for a letter in a variable?

[Orio]

I am not sure what you mean, but take a look at strpos().

 

Orio.