How to merge two class in PHP?

Question

So that the final class have all member variables/methods in both class

Is there an easy way to go?

Answer 1

You should encapsulate the both classes in a containing class, and provide a relevant interface (such as setters/getters for private variables

class YourFirstClass {
   public $variable;
   private $_variable2;
   public function setVariable2($a) {
       $this->_variable2 = $a;
   }
}

class YourSecondClass {
   public $variable;
   private $_variable2;
   public function setVariable2($a) {
       $this->_variable2 = $a;
   }
}

class ContaingClass {
   private $_first;
   private $_second;
   public function __construct(YourFirstClass $first, YourSecondClass $second) {
       $this->_first = $first;
       $this->_second = $second;
   }
   public function doSomething($aa) {
       $this->_first->setVariable2($aa);
   }
}

Research (google): "composition over inheritance"

Footnote: sorry for non-creative variable names..