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php澶嶅埗
Fatal error: Call to undefined method User::regist() in /register.php on line 18

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php澶嶅埗
class Calculator {
    public function add($a, $b) { /*...*/ }
}

$calc = new Calculator();
$calc->Add(1,2); // 澶у啓A瑕佸懡锛?/span>

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php澶嶅埗
$user->getProfile(); // 鉁?姝ｅ父鏄剧ず
$user->getproflie(); // 鉂?椹笂鍙樼孩娉㈡氮绾?/span>

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php澶嶅埗
if(method_exists($user, 'regist')) {
    $user->regist();
} else {
    throw new Exception("澶у摜锛乺egist鏂规硶浜洪棿钂稿彂浜嗭紒");
}

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php澶嶅埗
class MagicClass {
    public function __call($name, $arguments) {
        // 鑷畾涔夊鐞?/span>
    }
}

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