在 PHP 中从 JSON 数组中提取特定键值 [关闭]

我收到来自支付网关 (JSON) 的以下响应：

    {
  "response": {
    "token": "ch_lfUYEBK14zotCTykezJkfg",
    "success": true,
    "amount": 400,
    "currency": null,
    "description": "test charge",
    "email": "[email protected] /cdn-cgi/l/email-protection",
    "ip_address": "203.192.1.172",
    "created_at": "2012-06-20T03:10:49Z",
    "status_message": "Success!",
    "error_message": null,
    "card": {
      "token": "card_nytGw7koRg23EEp9NTmz9w",
      "display_number": "XXXX-XXXX-XXXX-0000",
      "scheme": "master",
      "address_line1": "42 Sevenoaks St",
      "address_line2": null,
      "address_city": "Lathlain",
      "address_postcode": "6454",
      "address_state": "WA",
      "address_country": "Australia"
    },
    "transfer": null
  }
}

我正在尝试获取success => true像这样的 if 语句的一部分：

<?php
    if($response['success'] == true) {
     // continue transaction
    }
?>

没有任何运气，所以我请求一些帮助来帮助我实现这一目标。如果能够提取其他键值也会很有用。

Thanks

Update

Your $response已经是一个对象，因此这个表达式应该有效：

if ($response->response->success == true) {
    // etc
}

您只是在寻找解码字符串表示形式的代码吗？如果是这样：

$response = <<<'EOM'
{
  "response": {
    "token": "ch_lfUYEBK14zotCTykezJkfg",
    "success": true,
    "amount": 400,
    "currency": null,
    "description": "test charge",
    "email": "[email protected] /cdn-cgi/l/email-protection",
    "ip_address": "203.192.1.172",
    "created_at": "2012-06-20T03:10:49Z",
    "status_message": "Success!",
    "error_message": null,
    "card": {
      "token": "card_nytGw7koRg23EEp9NTmz9w",
      "display_number": "XXXX-XXXX-XXXX-0000",
      "scheme": "master",
      "address_line1": "42 Sevenoaks St",
      "address_line2": null,
      "address_city": "Lathlain",
      "address_postcode": "6454",
      "address_state": "WA",
      "address_country": "Australia"
    },
    "transfer": null
  }
}
EOM;

$responseData = json_decode($responseText, true);

if ($responseData['response']['success'] == true) {
 // continue transaction
}