195 lines
7.8 KiB
PHP
195 lines
7.8 KiB
PHP
<?php
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namespace app\common\service;
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/**
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* 微信小程序接口服务
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*/
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class WechatService
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{
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protected static $jscode2sessionUrl = 'https://api.weixin.qq.com/sns/jscode2session';
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protected static $tokenUrl = 'https://api.weixin.qq.com/cgi-bin/token';
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protected static $getPhoneNumberUrl = 'https://api.weixin.qq.com/wxa/business/getuserphonenumber';
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protected static $getWxacodeUnlimitedUrl = 'https://api.weixin.qq.com/wxa/getwxacodeunlimit';
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/** @var string|null 内存缓存的 access_token */
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protected static $cachedAccessToken = null;
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/** @var int 缓存的 access_token 过期时间戳 */
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protected static $cachedAccessTokenExpire = 0;
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/**
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* 获取小程序 access_token（带简单内存缓存，过期前 5 分钟刷新）
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* @return array{access_token:string}|array{errcode:int,errmsg:string}
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*/
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public static function getAccessToken(): array
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{
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$now = time();
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if (self::$cachedAccessToken && self::$cachedAccessTokenExpire > $now + 300) {
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return ['access_token' => self::$cachedAccessToken];
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}
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$appId = config('wechat.app_id');
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$appSecret = config('wechat.app_secret');
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if (empty($appId) || empty($appSecret)) {
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return ['errcode' => -1, 'errmsg' => '未配置微信小程序 app_id 或 app_secret'];
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}
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$url = self::$tokenUrl . '?' . http_build_query([
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'grant_type' => 'client_credential',
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'appid' => $appId,
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'secret' => $appSecret,
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]);
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$resp = @file_get_contents($url);
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if ($resp === false) {
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return ['errcode' => -2, 'errmsg' => '请求微信接口失败'];
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}
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$data = json_decode($resp, true);
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if (empty($data) || !is_array($data)) {
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return ['errcode' => -3, 'errmsg' => '微信接口返回异常'];
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}
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if (isset($data['errcode']) && $data['errcode'] !== 0) {
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return [
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'errcode' => (int) $data['errcode'],
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'errmsg' => $data['errmsg'] ?? 'unknown',
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];
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}
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$token = $data['access_token'] ?? '';
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$expiresIn = (int) ($data['expires_in'] ?? 7200);
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self::$cachedAccessToken = $token;
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self::$cachedAccessTokenExpire = $now + $expiresIn;
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return ['access_token' => $token];
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}
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/**
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* 用 getPhoneNumber 回调里的 code 换取手机号
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* @param string $code 小程序 button open-type="getPhoneNumber" 回调中的 detail.code
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* @return array{phoneNumber:string,purePhoneNumber:string,countryCode:string}|array{errcode:int,errmsg:string}
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*/
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public static function getPhoneNumber(string $code): array
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{
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$tokenResult = self::getAccessToken();
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if (isset($tokenResult['errcode'])) {
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return $tokenResult;
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}
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$accessToken = $tokenResult['access_token'];
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$url = self::$getPhoneNumberUrl . '?access_token=' . urlencode($accessToken);
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$ctx = stream_context_create([
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'http' => [
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'method' => 'POST',
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'header' => 'Content-Type: application/json',
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'content' => json_encode(['code' => $code]),
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],
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]);
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$resp = @file_get_contents($url, false, $ctx);
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if ($resp === false) {
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return ['errcode' => -2, 'errmsg' => '请求微信接口失败'];
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}
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$data = json_decode($resp, true);
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if (empty($data) || !is_array($data)) {
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return ['errcode' => -3, 'errmsg' => '微信接口返回异常'];
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}
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if (isset($data['errcode']) && $data['errcode'] !== 0) {
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return [
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'errcode' => (int) $data['errcode'],
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'errmsg' => $data['errmsg'] ?? 'unknown',
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];
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}
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$phoneInfo = $data['phone_info'] ?? [];
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$purePhoneNumber = $phoneInfo['purePhoneNumber'] ?? $phoneInfo['phoneNumber'] ?? '';
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$phoneNumber = $phoneInfo['phoneNumber'] ?? $purePhoneNumber;
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$countryCode = $phoneInfo['countryCode'] ?? '86';
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return [
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'phoneNumber' => $phoneNumber,
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'purePhoneNumber' => $purePhoneNumber,
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'countryCode' => $countryCode,
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];
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}
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/**
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* code 换取 openid、session_key（及 unionid）
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* @param string $code 小程序 wx.login 返回的 code
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* @return array{openid:string,session_key:string,unionid?:string}|array{errcode:int,errmsg:string}
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*/
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public static function jscode2session(string $code): array
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{
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$appId = config('wechat.app_id');
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$appSecret = config('wechat.app_secret');
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if (empty($appId) || empty($appSecret)) {
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return ['errcode' => -1, 'errmsg' => '未配置微信小程序 app_id 或 app_secret'];
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}
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$url = self::$jscode2sessionUrl . '?' . http_build_query([
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'appid' => $appId,
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'secret' => $appSecret,
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'js_code' => $code,
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'grant_type' => 'authorization_code',
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]);
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$resp = @file_get_contents($url);
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if ($resp === false) {
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return ['errcode' => -2, 'errmsg' => '请求微信接口失败'];
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}
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$data = json_decode($resp, true);
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if (empty($data) || !is_array($data)) {
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return ['errcode' => -3, 'errmsg' => '微信接口返回异常'];
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}
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if (isset($data['errcode']) && $data['errcode'] !== 0) {
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return [
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'errcode' => (int) $data['errcode'],
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'errmsg' => $data['errmsg'] ?? 'unknown',
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];
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}
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return [
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'openid' => $data['openid'] ?? '',
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'session_key' => $data['session_key'] ?? '',
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'unionid' => $data['unionid'] ?? null,
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];
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}
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/**
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* 生成带参数的小程序码（永久有效），返回原始二进制或错误信息
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* @param string $scene 最大 32 个可见字符，用于区分邀请人/渠道
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* @param string $page 小程序页面路径，如 pages/index/index
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* @param int $width 小程序码宽度，默认 430
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* @return array{binary:string}|array{errcode:int,errmsg:string}
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*/
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public static function getWxacodeUnlimited(string $scene, string $page, int $width = 430): array
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{
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$tokenResult = self::getAccessToken();
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if (isset($tokenResult['errcode'])) {
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return $tokenResult;
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}
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$accessToken = $tokenResult['access_token'];
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$url = self::$getWxacodeUnlimitedUrl . '?access_token=' . urlencode($accessToken);
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$payload = [
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'scene' => mb_substr($scene, 0, 32),
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'page' => $page,
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'width' => $width,
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'check_path' => false,
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];
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$ctx = stream_context_create([
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'http' => [
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'method' => 'POST',
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'header' => 'Content-Type: application/json',
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'content' => json_encode($payload, JSON_UNESCAPED_UNICODE),
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],
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]);
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$resp = @file_get_contents($url, false, $ctx);
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if ($resp === false) {
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return ['errcode' => -2, 'errmsg' => '请求微信接口失败'];
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}
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// 微信错误时返回 JSON，成功时返回图片二进制
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$head = substr($resp, 0, 1);
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if ($head === '{' || $head === '[') {
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$data = json_decode($resp, true);
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if (is_array($data) && isset($data['errcode']) && $data['errcode'] !== 0) {
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return [
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'errcode' => (int) $data['errcode'],
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'errmsg' => $data['errmsg'] ?? 'unknown',
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];
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}
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}
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return ['binary' => $resp];
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}
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}
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