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<?php error_reporting(E_STRICT); class ImplicitPropertyClass { protected function on_start() { $this->implicitProperty = 'a'; } public function __construct() { $this->on_start(); } } class ExplicitPropertyClass { public $property; protected function on_start() { $this->property = 'a'; } public function __construct() { $this->on_start(); } } $a = new ImplicitPropertyClass(); $b = new ExplicitPropertyClass();
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