array vals are numeric check

is there a easy way to check if the values are in numeric only.

i did this to do a simple check, but didn't know if there was a better function to do it with.

foreach ($arrayas $check) {
                           if (!intval($check)) {
                              $error = "Invaild selection";
                           }
                        }

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I usually use the (int) function, but the way you are using is ok.

Here is an example :

$id = (int)$_GET['id'];
if ( $id == 0 ) die('problem');


So whatever the user sent to the id variable, if the value is not numeric it will be converted to 0

is there a easy way to check if the values are in numeric only.

Why not use is_numeric()?

Code:

foreach ($array as $check) {
    if (!is_numeric($check)) {
        $error = "Invaild selection";
    }
}

because i completely forgot about that command lol

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I think (int) is faster than is_numeric, that's why I am using it, and I do it just to validate data that come from $_GET or $_POST

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