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<?php declare(strict_types=1); final class Test { public int $prop; public function __construct() { unset($this->prop); } public function __get(string $property) { if ('prop' === $property) { return $this->prop = 1; } throw new LogicException(sprintf('Unknown property "%s"', $property)); } } $test = new Test(); var_dump($test->prop);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
int(1)
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected 'int' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/RbFFM on line 7
Process exited with code 255.

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