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<?php class x { private array $config = array(); function __isset($name) { print __METHOD__." ".$name.PHP_EOL; return isset($this->config[$name]); } function __get($name) { print __METHOD__." ".$name.PHP_EOL; return 'a'; } } $x = new x; var_dump(isset($x->a)); var_dump(empty($x->a));
Output for 8.2.31 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
x::__isset a bool(false) x::__isset a bool(true)

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27.97 ms | 1151 KiB | 7 Q