How to check if a *string* has only numbers...

["Rafael Soares" <design_animation@xxxxxxxxxxxx>]

Hello people!!!

 

I would like to check if a string contains only numbers, I really can?t
realize how to do it.

 

I tried is_int(), but it don?t work because the variable is a string (I used
gettype() to check it) and is_int() returns NULL?

 

It is to validate some data in a form. The variable I?m trying to test is
the result of this script:

 

$data = $_POST[?data?]; // something like 123.456.789

$dataParts = explode($data);

//these are the variable I have to check:

$dataP1 = $dataParts[0];

$dataP2 = $dataParts[1];

$dataP3 = $dataParts[3];

 

gettype($dataP1), gettype($dataP2) and gettype($dataP3) return string

gettype($dataParts) returns array

 

Thanks in advance.

 

Rafael Soares - AgênciaM

Fone:  +55 11 4616-1394