PHP: Is_numeric returns false on 0

Question

Hi everyone,

Is_numeric() as well as is_int() returns false if the value is 0. What can i do instead to verify that a specific value is numbers only in PHP?

Are we heading straight for the Regular Expressions camp, or are there some nice, handy feature for this out there already?

Thanks!

Answer 1

It is returning true for me in both cases:

var_dump(is_numeric(0));
var_dump(is_int(0));

Result:

bool(true)
bool(true)

Answer 2

var_dump(is_int("0"));

Will pass false because you are passing it the zero as a string literal. You could try passing the same thing as a variable which has gone through (I believe) parseInt("");

Though my php may be a little off, having been Javascripting nonstop the last week or two.

Answer 3

Restarted PHP on the server and it works out well now. Have no idea of why it occored though. Thanks everybody for their help!