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<?php class Bla { protected $bla; public function setBla($newBla) { if (isset($this->bla)) { throw new Exception('Erro: valor já foi setado'); } $this->bla = $newBla; } public function getBla() { return $this->bla; } } $x = new Bla(); var_dump($x);echo'<br/>'; $x->setBla(NULL); var_dump($x);echo'<br/>'; $x->setBla(3); var_dump($x);
Output for git.master, git.master_jit, rfc.property-hooks
object(Bla)#1 (1) { ["bla":protected]=> NULL } <br/>object(Bla)#1 (1) { ["bla":protected]=> NULL } <br/>object(Bla)#1 (1) { ["bla":protected]=> int(3) }

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