PHP微信公众号开发全攻略 从接入到消息处理的完整PHP实现方案

<?php
define("TOKEN", "你的公众号Token"); // 确保和微信后台设置的一致

$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];
$echostr = $_GET["echostr"];

$tmpArr = array(TOKEN, $timestamp, $nonce);
sort($tmpArr, SORT_STRING); // 字典序排序
$tmpStr = implode($tmpArr);
$tmpStr = sha1($tmpStr); // SHA1加密

if ($tmpStr == $signature) {
    echo $echostr; // 验证成功，返回echostr
    exit; // 记得退出，避免后续代码干扰
} else {
    // 验证失败，通常是token不匹配或排序、加密逻辑有误
    // 实际开发中可以记录日志，方便排查
    // error_log("WeChat verification failed. Signature: {$signature}, Calculated: {$tmpStr}");
    echo "Verification failed.";
    exit;
}
?>

file_get_contents('php://input')

simplexml_load_string()

<MsgType>

FromUserName; // 用户OpenID
    $toUsername = $postObj->ToUserName;     // 公众号原始ID
    $msgType = $postObj->MsgType;           // 消息类型

    $time = time();
    $textTpl = "
                
                
                %s
                <MsgType>
                
                0
                ";

    switch ($msgType) {
        case "text":
            $keyword = trim($postObj->Content); // 用户发送的文本内容
            if (!empty($keyword)) {
                $contentStr = "你说了：".$keyword;
                // 这里可以加入更复杂的逻辑，比如关键词回复、调用API等
            } else {
                $contentStr = "请说点什么吧！";
            }
            $msgType = "text";
            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
            echo $resultStr;
            break;
        case "image":
            // 处理图片消息，例如保存图片URL或进行图片识别
            $picUrl = $postObj->PicUrl;
            $contentStr = "你发了一张图片，链接是：".$picUrl;
            $msgType = "text"; // 回复文本消息
            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
            echo $resultStr;
            break;
        case "event":
            $event = $postObj->Event; // 事件类型：subscribe(关注), unsubscribe(取消关注), CLICK(点击菜单)等
            if ($event == "subscribe") {
                $contentStr = "欢迎关注！很高兴认识你！";
            } elseif ($event == "CLICK") {
                $eventKey = $postObj->EventKey; // 菜单点击事件的Key
                $contentStr = "你点击了菜单：".$eventKey;
            } else {
                $contentStr = "收到了一个事件：".$event;
            }
            $msgType = "text";
            $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
            echo $resultStr;
            break;
        // 更多消息类型处理...
        default:
            // 默认回复，或者不回复
            echo ""; // 不回复任何内容
            break;
    }
} else {
    echo ""; // 没有POST数据，不回复
}
?>

libxml_disable_entity_loader(true);

AppID

AppSecret

<?php
// 假设你已经定义了 APPID 和 APPSECRET
define("APPID", "你的AppID");
define("APPSECRET", "你的AppSecret");

function getAccessToken() {
    // 实际项目中应加入缓存机制，例如文件缓存或Redis缓存
    $cacheFile = 'access_token.json';
    if (file_exists($cacheFile)) {
        $data = json_decode(file_get_contents($cacheFile));
        if ($data->expire_time > time()) {
            return $data->access_token;
        }
    }

    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".APPID."&secret=".APPSECRET;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $output = curl_exec($ch);
    curl_close($ch);

    $json = json_decode($output);
    if (isset($json->access_token)) {
        $data = new stdClass();
        $data->access_token = $json->access_token;
        $data->expire_time = time() + 7000; // 微信access_token有效期为7200秒，提前200秒刷新
        file_put_contents($cacheFile, json_encode($data));
        return $json->access_token;
    } else {
        // 错误处理，例如记录日志
        // error_log("Failed to get access token: " . $output);
        return false;
    }
}

// 获取Access Token
$accessToken = getAccessToken();

if ($accessToken) {
    // 1. 自定义菜单：
    // 构造菜单JSON数据
    $menu = '{
        "button": [
            {
                "type": "click",
                "name": "我的服务",
                "key": "V1001_TODAY_MUSIC"
            },
            {
                "type": "view",
                "name": "我的主页",
                "url": "http://www.你的域名.com/index.php"
            },
            {
                "name": "更多",
                "sub_button": [
                    {
                        "type": "scancode_push",
                        "name": "扫码",
                        "key": "R1002_SCAN_CODE"
                    },
                    {
                        "type": "pic_weixin",
                        "name": "发图",
                        "key": "R1003_SEND_PIC"
                    }
                ]
            }
        ]
    }';
    $menuUrl = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=".$accessToken;
    // 发送POST请求创建菜单
    // $ch = curl_init();
    // curl_setopt($ch, CURLOPT_URL, $menuUrl);
    // curl_setopt($ch, CURLOPT_POST, 1);
    // curl_setopt($ch, CURLOPT_POSTFIELDS, $menu);
    // curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    // $result = curl_exec($ch);
    // curl_close($ch);
    // echo "创建菜单结果：".$result;

    // 2. 模板消息：
    // 假设你有一个模板ID和要发送的用户OpenID
    $openId = "用户的OpenID"; // 替换为实际用户的OpenID
    $templateId = "你的模板ID"; // 替换为你的模板ID

    $templateData = '{
        "touser": "'.$openId.'",
        "template_id": "'.$templateId.'",
        "url": "http://www.你的域名.com/detail.php",
        "data": {
            "first": {
                "value": "恭喜你购买成功！",
                "color": "#173177"
            },
            "keyword1": {
                "value": "巧克力",
                "color": "#173177"
            },
            "keyword2": {
                "value": "2023年10月26日",
                "color": "#173177"
            },
            "remark": {
                "value": "欢迎再次购买！",
                "color": "#173177"
            }
        }
    }';
    $templateMsgUrl = "https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=".$accessToken;
    // 发送POST请求发送模板消息
    // $ch = curl_init();
    // curl_setopt($ch, CURLOPT_URL, $templateMsgUrl);
    // curl_setopt($ch, CURLOPT_POST, 1);
    // curl_setopt($ch, CURLOPT_POSTFIELDS, $templateData);
    // curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    // $result = curl_exec($ch);
    // curl_close($ch);
    // echo "发送模板消息结果：".$result;

} else {
    // echo "获取access_token失败，无法执行高级操作。";
}
?>

curl