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<?php abstract class T { static protected $instanses; final private function __construct(){ } public static function getInstance() { if (!isset(static::$instanses)) { static::$instanses = new static; } return static::$instanses; } } class A extends T { static protected $instanses; } class B extends A { static protected $instanses; } $t = A::getInstance(); var_dump($t); $t1 = B::getInstance(); var_dump($t1); new B(); ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(A)#1 (0) { } object(B)#2 (0) { } Fatal error: Uncaught Error: Call to private T::__construct() from global scope in /in/MgbJ5:37 Stack trace: #0 {main} thrown in /in/MgbJ5 on line 37
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 object(A)#1 (0) { } object(B)#2 (0) { } Fatal error: Uncaught Error: Call to private T::__construct() from global scope in /in/MgbJ5:37 Stack trace: #0 {main} thrown in /in/MgbJ5 on line 37
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
object(A)#1 (0) { } object(B)#2 (0) { } Fatal error: Uncaught Error: Call to private T::__construct() from invalid context in /in/MgbJ5:37 Stack trace: #0 {main} thrown in /in/MgbJ5 on line 37
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
object(A)#1 (0) { } object(B)#2 (0) { } Fatal error: Call to private T::__construct() from invalid context in /in/MgbJ5 on line 37
Process exited with code 255.

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