PHP good method writing different names but the same method class.

For example, {code...} A and B have different roles. They cannot be merged. The content of {code...} C and D is exactly the same. Is there any good way to write the content of C and D? Because it is backward compatible with 5.3, trait cannot be used ~~~ For example:

class A {    private $value = null;    public function __construct() {        $this->value = 1;    }}class B {    private $differentValue = null;    public function __construct() {        $this->differentValue = 1;    }}

The roles of A and B are completely different. They cannot merge.

class C extends A {    public function display() {        echo "OK";    }}class D extends B {    public function display() {        echo "OK";    }}

The content of C and D is exactly the same. Is there any good way to write the content of C and D only once?

Because it is backward compatible with 5.3, trait cannot be used ~~~

Reply content:

For example:

class A {    private $value = null;    public function __construct() {        $this->value = 1;    }}class B {    private $differentValue = null;    public function __construct() {        $this->differentValue = 1;    }}

The roles of A and B are completely different. They cannot merge.

class C extends A {    public function display() {        echo "OK";    }}class D extends B {    public function display() {        echo "OK";    }}

The content of C and D is exactly the same. Is there any good way to write the content of C and D only once?

Because it is backward compatible with 5.3, trait cannot be used ~~~

class A {private $value = null;public function __construct() {$this->value = 1;}}class B {private $differentValue = null;public function __construct() {$this->differentValue = 1;}}/*** @method void display()*/class C extends A {private $handler = null;public function __construct() {parent::construct();$this->handler = new E();}public function __call($name, $params) {if ( method_exists($this->handler, $name) ) {return call_user_func_array(array($this->handler, $name), $params);} else {throw new Exception('Method "'.$name.'" does not exists.');}}}/*** @method void display()*/class D extends B {private $handler = null;public function __construct() {parent::construct();$this->handler = new E();}public function __call($name, $params) {if ( method_exists($this->handler, $name) ) {return call_user_func_array(array($this->handler, $name), $params);} else {throw new Exception('Method "'.$name.'" does not exists.');}}}Class E {public function display() {echo "OK";}}

Http://3v4l.org/ns6q7

  value = 1;    }}class B{    public $name            = 'b';    private $differentValue = null;    public function __construct()    {        $this->differentValue = 1;    }}class CD{    private $parent = null;    public function __construct($parent)    {        $this->parent = new $parent;    }    public function __call($name, $params)    {        if ( is_callable(array($this->parent, $name)) ) {            return call_user_func_array(array($this->parent, $name), $params);        } else {            throw new Exception('Method "'.$name.'" should be callable.');        }    }    public function __get($property_name){        if(isset($this->$property_name)) {            return $this->$property_name;        } elseif (isset($this->parent->$property_name)) {            return $this->parent->$property_name;        } else {            return null;        }    }    public function display()    {        echo "OK";    }}$c = new CD(new B);var_dump($c->name);