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<?php trait MyTrait { protected $attr = self::class . 'Test'; public function test() { return $this->attr; } } class A { use MyTrait; } class B { use MyTrait; } $a = new A(); $b = new B(); var_dump($a->test); var_dump($b->test);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined property: A::$test in /in/JP7nM on line 21 NULL Warning: Undefined property: B::$test in /in/JP7nM on line 22 NULL
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined property: A::$test in /in/JP7nM on line 21 NULL Warning: Undefined property: B::$test in /in/JP7nM on line 22 NULL
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined property: A::$test in /in/JP7nM on line 21 NULL Notice: Undefined property: B::$test in /in/JP7nM on line 22 NULL
Output for 7.3.32 - 7.3.33
NULL NULL
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151.67 ms | 401 KiB | 163 Q