微信公众号跳转小程序，详细教程

晚9点开始，11点结束，踩坑2个小时精华总结

废话不多说，直接上代码

前端

<style>
		.launch_btn_2{position: fixed;top: 200px;right:-50px;width: 145px;height: 45px;z-index:999;borde;radius: 25px;background: transparent;display:block;}
</style>

<div class="launch_btn_2">
	<wx-open-launch-weapp id="launch-btn" username="gh_xxxxx" path="/pages/home/index.html" style="display: block;">
		<template>
			<style>
				.btn {width: 80px; height: 30px;border-radius: 25px;background: #085B27;display:block;border:0px;color:white;}
			</style>
			<div style="text-align: center;align-items: center;margin: 10px;">
				<button class="btn btn-open-weapp">进入小程序</button>
			</div>
		</template>
	</wx-open-launch-weapp>
	<script>
		var btn = document.getElementById('launch-btn');
		btn.addEventListener('launch', function (e) {
			console.log('success');
		});
		btn.addEventListener('error', function (e) {
			console.log('fail', e.detail);
		});
	</script>
</div>

// 最后
<script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
<script type="text/javascript">
	wx.config({
		debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
		appId: 'xxxxxxx', // 必填，公众号的唯一标识
		timestamp: '<!--{$timestamp}-->', // 必填，生成签名的时间戳
		nonceStr: '<!--{$nonceStr}-->', // 必填，生成签名的随机串
		signature: '<!--{$sha_str}-->',// 必填，签名
		jsApiList: ['onMenuShareTimeline', 'scanQRCode','openLocation'],// 必填，需要使用的JS接口列表,
		openTagList: ['wx-open-launch-weapp']
	});
	wx.ready(function () {
		console.log('接口配置成功');
	});
</script>

php服务端

//add

// 微信 JS 接口签名校验工具: https://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=jsapisign
$appid = xxxxx'; //填入服务号AppID
$secret = 'xxxxxxxx'; //填入服务号AppSecret

// 获取token
$token_data = file_get_contents('./wechat_token.txt');
if (!empty($token_data)) {
    $token_data = json_decode($token_data, true);
}
$time = time() - $token_data['time'];
if ($time > 3600) {
    $token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appid}&secret={$secret}";
    $token_res = https_request($token_url);
    $token_res = json_decode($token_res, true);
    $token = $token_res['access_token'];
    $data = array(
        'time' => time(),
        'token' => $token
    );
    $res = file_put_contents('./wechat_token.txt', json_encode($data));
    if ($res) {
//        echo '更新 token 成功';
    }
} else {
    $token = $token_data['token'];
}

// 获取ticket
$ticket_data = file_get_contents('./wechat_ticket.txt');
if (!empty($ticket_data)) {
    $ticket_data = json_decode($ticket_data, true);
}
$time = time() - $ticket_data['time'];
if ($time > 3600) {
    $ticket_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={$token}&type=jsapi";
    $ticket_res = https_request($ticket_url);
    $ticket_res = json_decode($ticket_res, true);
    $ticket = $ticket_res['ticket'];
    $data = array(
        'time' => time(),
        'ticket' => $ticket
    );
    $res = file_put_contents('./wechat_ticket.txt', json_encode($data));
    if ($res) {
//        echo '更新 ticket 成功';
    }
} else {
    $ticket = $ticket_data['ticket'];
}

// 进行sha1签名
$timestamp = time();
$nonceStr = createNonceStr();

// 注意 URL 建议动态获取(也可以写死).
$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
$url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]"; // 调用JSSDK的页面地址

// $url = $_SERVER['HTTP_REFERER']; // 前后端分离的, 获取请求地址(此值不准确时可以通过其他方式解决)
$str = "jsapi_ticket={$ticket}&noncestr={$nonceStr}&timestamp={$timestamp}&url={$url}";
$sha_str = sha1($str);

function createNonceStr($length = 16)
{
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
        $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
}

/**
 * 模拟 http 请求
 * @param  String $url 请求网址
 * @param  Array $data 数据
 */
function https_request($url, $data = null)
{
    // curl 初始化
    $curl = curl_init();
    // curl 设置
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
    // 判断 $data get  or post
    if (!empty($data)) {
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    }
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    // 执行
    $res = curl_exec($curl);
    curl_close($curl);
    return $res;
}
//end

ps：
1.wx-open-launch-weapp标签 username填写的是小程序源氏ID
2.给button标签添加 display:block;属性
3.微信开发者工具无法调试，按钮不会显示，只能在微信内打开测试（按钮只会在手机微信内访问H5显示）。
4.openTagList: [‘wx-open-launch-weapp’]
5.js接口列表填写openLocation。
6.欢迎各位大大补充~~
如果对你有帮助，小手一扫，给个激励啊
如果对你有帮助，小手一扫，给孩子口饭吃吧~~

微信公众号跳转小程序，详细教程

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