WechatMini.php
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<?php
declare(strict_types=1);
namespace app\service;
/**
* 微信小程序 jscode2session
*/
class WechatMini
{
/**
* @return array{ok:bool,msg:string,phone?:string}
*/
public static function getPhoneByCode(string $phoneCode): array
{
$appId = (string) config('wechat.mini_appid');
$secret = (string) config('wechat.mini_secret');
if ($appId === '' || $secret === '') {
return ['ok' => false, 'msg' => '服务端未配置微信小程序 AppID/Secret'];
}
if ($phoneCode === '') {
return ['ok' => false, 'msg' => '缺少手机号授权 code'];
}
$tokenRes = self::getAccessToken($appId, $secret);
if (!$tokenRes['ok']) {
return ['ok' => false, 'msg' => (string) $tokenRes['msg']];
}
$token = (string) ($tokenRes['access_token'] ?? '');
if ($token === '') {
return ['ok' => false, 'msg' => '获取微信 access_token 失败'];
}
$url = 'https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=' . rawurlencode($token);
$httpErr = '';
$raw = self::httpPostJson($url, ['code' => $phoneCode], $httpErr);
if ($raw === null || $raw === '') {
return ['ok' => false, 'msg' => '请求微信手机号接口失败' . ($httpErr !== '' ? ('：' . $httpErr) : '')];
}
$data = json_decode($raw, true);
if (!is_array($data)) {
return ['ok' => false, 'msg' => '微信手机号接口返回异常'];
}
if (!empty($data['errcode'])) {
$msg = (string) ($data['errmsg'] ?? '微信错误');
return ['ok' => false, 'msg' => $msg . ' (' . ($data['errcode'] ?? '') . ')'];
}
$phoneInfo = (array) ($data['phone_info'] ?? []);
$phone = trim((string) ($phoneInfo['phoneNumber'] ?? $phoneInfo['purePhoneNumber'] ?? ''));
if ($phone === '') {
return ['ok' => false, 'msg' => '未获取到手机号'];
}
return ['ok' => true, 'msg' => 'ok', 'phone' => $phone];
}
/**
* @return array{ok:bool,msg:string,access_token?:string}
*/
private static function getAccessToken(string $appId, string $secret): array
{
$url = sprintf(
'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s',
rawurlencode($appId),
rawurlencode($secret)
);
$httpErr = '';
$raw = self::httpGet($url, $httpErr);
if ($raw === null || $raw === '') {
return ['ok' => false, 'msg' => '获取微信 access_token 失败' . ($httpErr !== '' ? ('：' . $httpErr) : '')];
}
$data = json_decode($raw, true);
if (!is_array($data)) {
return ['ok' => false, 'msg' => '微信 access_token 返回异常'];
}
if (!empty($data['errcode'])) {
$msg = (string) ($data['errmsg'] ?? '微信错误');
return ['ok' => false, 'msg' => $msg . ' (' . ($data['errcode'] ?? '') . ')'];
}
$token = (string) ($data['access_token'] ?? '');
if ($token === '') {
return ['ok' => false, 'msg' => '微信 access_token 为空'];
}
return ['ok' => true, 'msg' => 'ok', 'access_token' => $token];
}
/**
* @return array{ok:bool,msg:string,openid?:string,unionid?:string,session_key?:string}
*/
public static function code2Session(string $jsCode): array
{
$appId = (string) config('wechat.mini_appid');
$secret = (string) config('wechat.mini_secret');
if ($appId === '' || $secret === '') {
return [
'ok' => false,
'msg' => '服务端未配置微信小程序 AppID/Secret，请在 backend/.env 填写 WECHAT_MINI_APPID 与 WECHAT_MINI_SECRET 后重启后端',
];
}
$url = sprintf(
'https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code',
rawurlencode($appId),
rawurlencode($secret),
rawurlencode($jsCode)
);
$httpErr = '';
$raw = self::httpGet($url, $httpErr);
if ($raw === null || $raw === '') {
$msg = '请求微信接口失败（本机 PHP 无法访问 https://api.weixin.qq.com）';
if ($httpErr !== '' && (bool) env('APP_DEBUG', false)) {
$msg .= '：' . $httpErr;
} elseif ($httpErr !== '') {
$msg .= '。可开启 APP_DEBUG 查看详情，或检查是否启用 php_curl / openssl、防火墙是否拦截出站 HTTPS';
} else {
$msg .= '。Windows 常见原因：未启用 curl 扩展，或 php.ini 中 allow_url_fopen=Off；请启用 extension=curl 后重启 PHP';
}
return ['ok' => false, 'msg' => $msg];
}
$data = json_decode($raw, true);
if (!is_array($data)) {
return ['ok' => false, 'msg' => '微信接口返回异常'];
}
if (!empty($data['errcode'])) {
$msg = (string) ($data['errmsg'] ?? '微信错误');
return ['ok' => false, 'msg' => $msg . ' (' . ($data['errcode'] ?? '') . ')'];
}
$openid = (string) ($data['openid'] ?? '');
if ($openid === '') {
return ['ok' => false, 'msg' => '未获取到 openid'];
}
return [
'ok' => true,
'msg' => 'ok',
'openid' => $openid,
'unionid' => (string) ($data['unionid'] ?? ''),
'session_key' => (string) ($data['session_key'] ?? ''),
];
}
/**
* 访问微信 HTTPS 接口：优先 cURL（Windows 上比 allow_url_fopen 更可靠），否则 file_get_contents。
*
* @param-out string $errorDetail 失败时简要原因（调试展示用）
*/
private static function httpGet(string $url, string &$errorDetail = ''): ?string
{
$errorDetail = '';
if (function_exists('curl_init')) {
$ch = curl_init($url);
if ($ch !== false) {
curl_setopt_array($ch, [
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_CONNECTTIMEOUT => 10,
CURLOPT_TIMEOUT => 20,
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_SSL_VERIFYHOST => 2,
]);
$body = curl_exec($ch);
$errno = curl_errno($ch);
$cerr = $errno ? (string) curl_error($ch) : '';
$code = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($body !== false && $body !== '' && $code >= 200 && $code < 300) {
return $body;
}
$errorDetail = $cerr !== '' ? ('cURL ' . $cerr) : ('HTTP ' . $code);
}
}
if (!ini_get('allow_url_fopen')) {
$errorDetail = $errorDetail !== '' ? $errorDetail : 'allow_url_fopen=Off 且 cURL 未成功';
return null;
}
$ctx = stream_context_create([
'http' => [
'timeout' => 20,
],
'ssl' => [
'verify_peer' => true,
'verify_peer_name' => true,
],
]);
$body = @file_get_contents($url, false, $ctx);
if ($body !== false && $body !== '') {
return $body;
}
if ($errorDetail === '') {
$errorDetail = 'file_get_contents 失败（可检查 openssl 扩展与网络）';
}
return null;
}
private static function httpPostJson(string $url, array $payload, string &$errorDetail = ''): ?string
{
$errorDetail = '';
$json = json_encode($payload, JSON_UNESCAPED_UNICODE);
if ($json === false) {
$errorDetail = 'JSON 编码失败';
return null;
}
if (function_exists('curl_init')) {
$ch = curl_init($url);
if ($ch !== false) {
curl_setopt_array($ch, [
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_CONNECTTIMEOUT => 10,
CURLOPT_TIMEOUT => 20,
CURLOPT_SSL_VERIFYPEER => true,
CURLOPT_SSL_VERIFYHOST => 2,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => $json,
CURLOPT_HTTPHEADER => ['Content-Type: application/json; charset=utf-8'],
]);
$body = curl_exec($ch);
$errno = curl_errno($ch);
$cerr = $errno ? (string) curl_error($ch) : '';
$code = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
if ($body !== false && $body !== '' && $code >= 200 && $code < 300) {
return $body;
}
$errorDetail = $cerr !== '' ? ('cURL ' . $cerr) : ('HTTP ' . $code);
}
}
if (!ini_get('allow_url_fopen')) {
$errorDetail = $errorDetail !== '' ? $errorDetail : 'allow_url_fopen=Off 且 cURL 未成功';
return null;
}
$ctx = stream_context_create([
'http' => [
'method' => 'POST',
'header' => "Content-Type: application/json; charset=utf-8\r\n",
'content' => $json,
'timeout' => 20,
],
'ssl' => [
'verify_peer' => true,
'verify_peer_name' => true,
],
]);
$body = @file_get_contents($url, false, $ctx);
if ($body !== false && $body !== '') {
return $body;
}
if ($errorDetail === '') {
$errorDetail = 'file_get_contents POST 失败';
}
return null;
}
}