I'm working on a PHP class that serves as a wrapper for the Memcached class provided via a PECL extension. I am having difficulty handling a method that calls the get method. The third argument in the get method defaults to null and passes a variable by reference. I am having difficulties mirroring the functionality of the Memcached get method with my wrapper.
By using the Memcached class directly, the following occurs:
$m = new Memcached();
$m->addServer( '127.0.0.1', 11211 );
$m->add( 'my-key', 'my-value' );
$m->get( 'my-key', null, $cas_token );
var_dump( $cas_token ); // (float) 3212
The point here is that I can pass an uninitialized, null var to the get function and it works by setting the CAS token to that var, which can then later be accessed.
In my class, I want to offer the ability to use this CAS token with my wrapper method; however, I want the ability to do something different depending on whether the method is called with the third variable or not. I cannot find a way to differentiate whether the third variable has been explicitly called or not when I use the wrapper method. A skeleton of what I'm attempting follows:
class MyMemcached {
...
public function get( $key, $cache_cb = NULL, &$cas_token = NULL ) {
if ( is_callable( $cache_cb ) || ! is_null( $cas_token ) ) {
$this->m->get( $key, $cache_cb, $cas_token );
} else {
// Do something differently
}
}
}
$myMemcached = new Memcached();
$myMemcached->addServer( '127.0.0.1', 11211 );
$myMemcached->add( 'my-key', 'my-value' );
$myMemcached->get( 'my-key', null, $cas_token );
var_dump( $cas_token ); // NULL
Again, in MyMemcached::get, I cannot distinguish between if a user calls it with a NULL var or not. Do you know of any way I can distinguish between these two events?
Thanks!
