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<?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();
Output for git.master, git.master_jit, rfc.property-hooks
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.

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