PHP - Force function parameter to integer

Question

In PHP you can do the following thing:

class Something {// bla bla}

function functionName(Something $object) {
    // Do stuff here  ^^^^^^^^^
}


        

Answer 1

You can't typehint scalar types in PHP. The only chance is to use a wrapper type. The SPL library ships with SplInt for that purpose.

Update: Looks like PHP 7 offers that feature. Sigh, times changed :)

Answer 2

You can't do this for scalar types see the manual:

And a quote from there:

Type hints cannot be used with scalar types such as int or string. Resources and Traits are not allowed either.

But you will be able to to this with PHP 7: https://wiki.php.net/rfc/scalar_type_hints_v5