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<?php abstract class T { static $instanses; final private function __construct(){ } public static function getInstance() { if (!isset(static::$instanses)) { $className = get_class(); static::$instanses = new $className; } return static::$instanses; } } class A extends T { } class B extends A { } $t = A::getInstance(); var_dump($t); $t1 = B::getInstance(); var_dump($t1); ?>
Output for 8.3.0 - 8.3.4, 8.3.6
Deprecated: Calling get_class() without arguments is deprecated in /in/r6TDY on line 14 Fatal error: Uncaught Error: Cannot instantiate abstract class T in /in/r6TDY:15 Stack trace: #0 /in/r6TDY(30): T::getInstance() #1 {main} thrown in /in/r6TDY on line 15
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Deprecated: Calling get_class() without arguments is deprecated in /in/r6TDY on line 14 Fatal error: Uncaught Error: Cannot instantiate abstract class T in /in/r6TDY:15 Stack trace: #0 /in/r6TDY(30): T::getInstance() #1 {main} thrown in /in/r6TDY on line 15
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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
Fatal error: Uncaught Error: Cannot instantiate abstract class T in /in/r6TDY:15 Stack trace: #0 /in/r6TDY(30): T::getInstance() #1 {main} thrown in /in/r6TDY on line 15
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21
Fatal error: Cannot instantiate abstract class T in /in/r6TDY on line 15
Process exited with code 255.

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