interger/char comparison

[crawfd]

I think I could contemplate a number of ways to do this, but what's the most efficient way of interperting in php whether or not the post of a text field is an interger or char? Does php include a function that does this?

<input type="text" name="intorchar" size="3" onClick="this.value=''">

• Justin

[bpat1434]

Well, when it's submitted, it's a string. So really you have a couple options:

1.) Type cast it to integer
2.) Verify with Regular Expressions
3.) Verify with ereg

1.)

$intorchar = (int) $_POST['intorchar']; // Makes it an integer

2.)

if(preg_match('/[0-9]{1,3}/', $_POST['intorchar'])) { /* Integer */ } else { /* Text */ }

3.)

if(ereg('^[0-9]+$', $_POST['intorchar'])) { /* integer */ } else { /* Text */ }

Hope that makes sense.

[bradgrafelman]

One of the [man]ctype[/man] functions might be in order here:

if(ctype_digit($_POST['intorchar'])) {
// it's an integer
} else {
// it's not an integer
}

[bpat1434]

Woops, totally forgot about that Brad.