<?php
abstract class A {
protected $a = 'AAA';
private $b = 'BBB';
public function printB() { echo $this->b.PHP_EOL; }
}
class B extends A {
public function printB2() { echo $this->b.PHP_EOL; }
public function printA() { echo $this->a.PHP_EOL; }
}
$obj = new B;
$a->printA();
$a->printB();
$a->printB2();
Warning: Undefined variable $a in /in/6Y5ah on line 16
Fatal error: Uncaught Error: Call to a member function printA() on null in /in/6Y5ah:16
Stack trace:
#0 {main}
thrown in /in/6Y5ah on line 16
Process exited with code 255.
Notice: Undefined variable: a in /in/6Y5ah on line 16
Fatal error: Uncaught Error: Call to a member function printA() on null in /in/6Y5ah:16
Stack trace:
#0 {main}
thrown in /in/6Y5ah on line 16
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Call to a member function printA() on null in /in/6Y5ah:16
Stack trace:
#0 {main}
thrown in /in/6Y5ah on line 16
Process exited with code 255.
Output for 7.0.0 - 7.0.4
Notice: Undefined variable: a in /in/6Y5ah on line 16
Fatal error: Uncaught Error: Call to a member function printA() on unknown in /in/6Y5ah:16
Stack trace:
#0 {main}
thrown in /in/6Y5ah on line 16
Process exited with code 255.
Output for 5.6.0 - 5.6.40
Notice: Undefined variable: a in /in/6Y5ah on line 16
Fatal error: Call to a member function printA() on null in /in/6Y5ah on line 16
Process exited with code 255.
Notice: Undefined variable: a in /in/6Y5ah on line 16
Fatal error: Call to a member function printA() on a non-object in /in/6Y5ah on line 16
Process exited with code 255.
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: a in /in/6Y5ah on line 16
Fatal error: Call to a member function printA() on a non-object in /in/6Y5ah on line 16
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CLASS in /in/6Y5ah on line 3
Process exited with code 255.