PHP call function from parent in child best practice -


i have trick question regarding php calling function parent in child class. have 3 scenarios, , want pros , cons.

<?php class test{    private $var ;    public function __construct(){     $this->var = 'hello world';    }     public function output(){       echo $var.'<br>';    } } //scenario 1 class test1 extends test{    public function __construct(){     parent::__construct();    }    public function say(){     parent::output();    } } //scenario 2 class test2 extends test{    public function __construct(){     test::__construct();    }    public function say(){     test::output();    } } //scenario 3 class test3 extends test{     private $handle ;     public function __construct(){      $this->handle = new test();     }     public function say(){      $this->handle->output();     } } //finally can call 3 cases 1 of below codes $test1 = new test1(); $test1->say(); //or $test2 = new test2(); $test2->say(); //or $test3 = new test3(); $test3->say(); ?>

is there best practice or there of 3 scenarios better other?

thank in advance.

1) correct

2) incorrect call method static method.

3) not have sense extend , create in constructor.


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