php - what's the purpose of factories? -


i'm trying understand why object should created using factories , not new operator? example:

$validatepost = validation::factory($_post);

instead of 

$validatepost = new validation($_post);

the static method factory of class same:

public static function factory(array $array)     {         return new validation($array);     }

this way have 1 method objects created with. , if need add additional functionality creating, example, models, override original factory() method own in application folder.


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