Factory of Patterns

Patterns

Patterns are ways to describe best practices and good designs. They show a flexible solution to common programming problems.

Factory

The Factory pattern allows for the instantiation of objects at runtime. It is called a Factory Pattern since it is responsible for "manufacturing" an object. A Parameterized Factory receives the name of the class to instantiate as argument.

<?php
class Factory
{
 public static function driver($class_name)
 {
  if(include_once($class_name . ".php"))
  {
   return new $class_name;
  }
  else
  {
   // throw new Exception ("no such {$class_name}");
  }
 }
}

$a = Factory::driver('caller');
var_dump($a);
// $v = Factory::driver('mysql');
?>