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<?php class x { public function __set($name, $value) { if ($value == 'mooo') $this->doSomethingPotentiallySetty(); var_dump(property_exists($this, $name)); } public function doSomethingPotentiallySetty() { $this->test = 123; } } $x = new x(); $x->doSomethingPotentiallySetty(); var_dump($x); $x->test = 'mooo'; var_dump($x);
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) object(x)#1 (0) { } Deprecated: Creation of dynamic property x::$test is deprecated in /in/NCgaU on line 15 bool(true) object(x)#1 (1) { ["test"]=> int(123) }

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