Re: PHP 4.0 Bug #2675 Updated: Misbehavior of object initializers

You should use the Factory design pattern I suppose. How about the following: class DB {

        function Factory($driver) {
                switch( $driver ) {
                        case 'mysql':
                                return new Mysql_Db();
                        case 'oracle':
                                return new Oracle_Db();
                        default:
                                return new Dummy_Db();
                }
        }

} And then do something like (actually it doesn't even need to be $new_db = DB::Factory('mysql'); Andi At 10:49 AM 11/6/99 -0600, ZeroDiVide wrote:

So how do i do polymorphisim in php? What'd i'd like to do : class Db {

        Function Db( $driver ) {
                switch( $driver ) {
                        case 'mysql':
                                return new Mysql_Db();
                        case 'oracle':
                                return new Oracle_Db();
                        default:
                                return new Dummy_Db();
                }
        }

This is so i can achive a rough equivelence class with dbi :: dbd. $new_db = new Db( 'mysql' ); --------------------------------------------------------------------------- -----

| Jason "ZeroDiVide" Orcutt                             "Code is life is Code" |
| Prometheus Project - http://prometheus.zerodivide.net                        |
--------------------------------------------------------------------------- -----

On 6 Nov 1999, Bug Database wrote: ID: 2675 Updated by: andi Reported By: zerodiv@zerodivide.net Status: Closed Bug Type: Other Assigned To: Comments: This is not a bug. You are misusing constructors. What the new operator does is similar to C++. It first allocates memory for the object and then calls the objects constructor. The constructor does not have a return value and returning something from it is pointless. When you're calling new Bar(); you're telling PHP you want a new object of type Bar and not foo. Maybe what you want is inheritence? Full Bug description available at: http://bugs.php.net/version4/?id=2675 -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net For additional commands, e-mail: php-dev-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net For additional commands, e-mail: php-dev-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net

--- Andi Gutmans <andi@zend.com> http://www.zend.com/