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<?php abstract class A { public function __construct() { echo '__CLASS__: ', __CLASS__, "\n"; echo 'get_class(): ', get_class(), "\n"; echo 'get_class($this): ', get_class($this), "\n"; } } class B extends A { public function __construct() { parent::__construct(); } } new B();
Output for 8.3.0 - 8.3.6
__CLASS__: A get_class(): Deprecated: Calling get_class() without arguments is deprecated in /in/5jRpv on line 5 A get_class($this): B
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
__CLASS__: A get_class(): A get_class($this): B
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CLASS in /in/5jRpv on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_CLASS in /in/5jRpv on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/5jRpv on line 2
Process exited with code 255.

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