if ( is_string( $callback ) ) {

[1000] Fix | Delete

return $callback;

[1001] Fix | Delete

}

[1002] Fix | Delete

[1003] Fix | Delete

if ( is_object( $callback ) ) {

[1004] Fix | Delete

// Closures are currently implemented as objects.

[1005] Fix | Delete

$callback = array( $callback, '' );

[1006] Fix | Delete

} else {

[1007] Fix | Delete

$callback = (array) $callback;

[1008] Fix | Delete

}

[1009] Fix | Delete

[1010] Fix | Delete

if ( is_object( $callback[0] ) ) {

[1011] Fix | Delete

// Object class calling.

[1012] Fix | Delete

return spl_object_hash( $callback[0] ) . $callback[1];

[1013] Fix | Delete

} elseif ( is_string( $callback[0] ) ) {

[1014] Fix | Delete

// Static calling.

[1015] Fix | Delete

return $callback[0] . '::' . $callback[1];

[1016] Fix | Delete

}

[1017] Fix | Delete

[1018] Fix | Delete

return null;

[1019] Fix | Delete

}

[1020] Fix | Delete

[1021] Fix | Delete