如何在php中获取对象的值？

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当我尝试获取对象值时，我遇到了问题。但是当我只是回显对象时，没有null我不知道如何获取该值

if(isset($_POST['submit'])) {

    $secret = "6Le3nvgUAAAAAMU0DRNLtvtaIq3h6X9ybEnO_txv";
    $captcha = $_POST['g-recaptcha-response'];
    $url = 'https://www.google.com/recaptcha/api/siteverify?secret='.$secret.'&response='.$captcha;

    $response = file_get_contents($url);


    echo $response;


}

我得到了回应

enter image description here

但是当我尝试$ response->成功时。它返回null ..

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田又青
田又青

The response you 've got is written in JavaScript Object Notation (JSON). For this purpose PHP got it 's own JSON decode and encode functions.

$decodedResponse = json_decode($response);
var_dump($decodedResponse->success);
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