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<?php class A { public function get() { var_dump($this->baz); var_dump(get_object_vars($this)); } } class B extends A { public $foo; public $bar = 'bar'; public string $baz; } $b = new B; $b->get();
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Fatal error: Uncaught Error: Typed property B::$baz must not be accessed before initialization in /in/A0jIq:5 Stack trace: #0 /in/A0jIq(18): A->get() #1 {main} thrown in /in/A0jIq on line 5
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 Fatal error: Uncaught Error: Typed property B::$baz must not be accessed before initialization in /in/A0jIq:5 Stack trace: #0 /in/A0jIq(18): A->get() #1 {main} thrown in /in/A0jIq on line 5
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected 'string' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/A0jIq on line 13
Process exited with code 255.

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