头条小程序登录获取openid失败：如何排查“code错误”？

头条小程序登录：解决“code错误”导致openid获取失败

在开发头条小程序登录功能时，开发者经常遇到获取openid失败并提示“code错误”的情况。本文将通过一个实际案例，分析问题原因并提供解决方案。

案例中，开发者使用PHP代码，通过curl向头条小程序的jscode2session接口发送请求获取openid。代码片段如下：

public function ttLogin(){    $params = request()->param();    $code = $params['code'];    $anonymousCode = $params['anonymousCode'];    $url = 'https://developer.toutiao.com/api/apps/v2/jscode2session';    $data = [        "appid" => "ttd54ba74ue000000c01",        "secret" => "041ajajgeokjkkkk999978c10e6",        "anonymous_code" => $anonymousCode,        "code" => $code    ];    $header[] = "Content-Type:application/json";    $data = json_encode($data);    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_POST, true);    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_CUSTOMREQUEST,'POST');    $res = curl_exec($ch);    $error = curl_error($ch);    curl_close($ch);    return $res;}

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