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  1. <?php
  2. abstract class Person{
  3. 	private $age;
  4. 	public abstract function show_age();
  5. }
  6. class Student extends Person{
  7. 	function __construct($age)
  8. 	{
  9. 		$this->age = $age;
  10. 	    //Person::$age = $age;
  11. 	}
  12. 	public function show_age()
  13. 	{
  14. 		echo "$this->age \n";
  15. 	}
  16. }
  17. $s=new Student(31);
  18. $s->show_age();
  19. print_r($s);
Success #stdin #stdout 0.03s 25820KB
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stdin
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Standard input is empty
stdout
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31 
Student Object
(
    [age:Person:private] => 
    [age] => 31
)
https://ideone.com/9jdrrw
language:
PHP (php 7.3.5)
created:
3 years ago
visibility:
public

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