Blog to Official Account Traffic Auto-Generate Verification Code: WeChat Official Platform Verification Code View Plugin

Previously, Naiba shared3 methods to implement blog to official account traffic, which included using a plugin that replies with keywords to obtain a password. However, the verification code for that plugin was manually entered by the site owner. The one recommended today automatically generates and retrieves verification codes, achieving the function of automatic verification code change for traffic.The plugin code is as follows:

<?php
/*
Plugin Name: 微信公众平台验证码查看插件
Plugin URI: https://gitcafe.net/
Description: 微信公众平台验证码可见插件，接口地址为：域名?wxcaptcha  ,其实随便
Version: 1.0
Author: 云落
Author URI: https://gitcafe.net/
*/

// 此token必须和微信公众平台中的设置保持一致
define('WX_TOKEN', '');
define('WX_QR', '');//公众号二维码

// 以下内容不需要改动

/***  微信端开始 ***/
class Wechat_Captcha {
	function __construct($wx_captcha) {
		$this->captcha = $wx_captcha;
	}
	private function checkSignature() {
		$signature = $_GET["signature"];
		$timestamp = $_GET["timestamp"];
		$nonce = $_GET["nonce"];
		$token = WX_TOKEN;
		$tmpArr = array($token, $timestamp, $nonce);
		sort($tmpArr, SORT_STRING);
		$tmpStr = implode($tmpArr);
		$tmpStr = sha1($tmpStr);
		if ($tmpStr == $signature)
		            return true; else
		            return false;
	}
	protected function valid() {
		$echoStr = $_GET["echostr"];
		//valid signature , option
		if ($this->checkSignature()) {
			echo $echoStr;
			exit;
		} else {
			echo 'error signature';
		}
	}
	public function responseMsg() {
		//如果是验证请求,则执行签名验证并退出
		if (!empty($_GET["echostr"])) {
			$this->valid();
			//验证签名是否有效
			return;
			//返回退出
		}
		if ($_SERVER['REQUEST_METHOD'] != 'POST') {
			echo '';
			return;
		}
		//如果不是验证请求，则
		//首先，取得POST原始数据(XML格式)
		//$postData = $GLOBALS["HTTP_RAW_POST_DATA"];
		$postData = file_get_contents('php://input');
		if (empty($postData)) {
			echo '';
			return;
		}
		//如果没有POST数据，则退出
		if (!empty($postData)) {
			//解析POST数据(XML格式)
			$object = simplexml_load_string($postData, 'SimpleXMLElement', LIBXML_NOCDATA);
			$messgeType = trim($object->MsgType);//取得消息类型
			$this->fromUser = "" . $object->FromUserName;
			$this->toUser = "" . $object->ToUserName;
			$keyword = trim($object->Content);
			if( $messgeType == 'text' && $keyword == '验证码') {
				$response_content = '您的验证码为：【'.$this->captcha.'】，验证码有效期为2分钟，请抓紧使用，过期需重新申请';
				$xmlTemplate = "<xml>
                    <ToUserName><![CDATA[%s]]></ToUserName>
                    <FromUserName><![CDATA[%s]]></FromUserName>
                    <CreateTime>%s</CreateTime>
                    <MsgType><![CDATA[text]]></MsgType>
                    <Content><![CDATA[%s]]></Content>
                    <FuncFlag>%d</FuncFlag>
                    </xml>";
				$xmlText = sprintf($xmlTemplate, $this->fromUser, $this->toUser, time(), $response_content, 0);
				echo $xmlText;
			}
		} else {
			echo "";
			exit;
		}
	}
}
//class end

//生成微信验证码
function wx_captcha(){
	date_default_timezone_set('Asia/Shanghai');
	$min = floor(date("i")/2);
	$day = date("d");
	$day = ltrim($day,0);
	$url = home_url();
	$captcha = sha1($min.$url.WX_TOKEN);
	$captcha = substr($captcha , $day , 6);
	return $captcha;

}

function wx_process() {
	global $object;
	$object = new Wechat_Captcha(wx_captcha());
	$object->responseMsg();
	return;
}
add_action('pre_get_posts', 'wx_process', 4);

/***  微信端结束 ***/

/***  WP端开始 ***/
//密码可见
function wx_captcha_view() {
	$action = $_POST['action'];
	$post_id = $_POST['id'];
	$pass = $_POST['pass'];
	$wxcaptcha = wx_captcha();
	if(!isset( $action )  ||  !isset( $post_id )  ||  !isset( $pass )   ) exit('400');
	if($pass == $wxcaptcha ) {
	$pass_content = get_post_meta($post_id, '_pass_content')[0];
	exit($pass_content);
	}else{
		exit('400');
	}
}
add_action('wp_ajax_nopriv_gdk_pass_view', 'wx_captcha_view');
add_action('wp_ajax_gdk_pass_view', 'wx_captcha_view');


// 部分内容输入密码可见
function gdk_secret_view($atts, $content = null) {
    $pid = get_the_ID();
    add_post_meta($pid, '_pass_content', $content, true) or update_post_meta($pid, '_pass_content', $content);
    if ( current_user_can( 'administrator' ) ) { return $content; }//admin show
        return '<link rel="stylesheet" id="pure_css-css"  href="https://cdn.jsdelivr.net/npm/css-mint@2.0.7/build/css-mint.min.css?ver=0.0.1" type="text/css"/>
		<div class="cm-grid cm-card pass_viewbox">
   <div class="cm-row">
      <div class="cm-col-md-4">
         <img src="'.WX_QR.'" class="cm-resp-img">
      </div>
      <div class="cm-col-md-8">
         <div class="hide_content_info" style="margin:10px 0">
			<div class="cm-alert primary">本段内容已被隐藏，您需要扫码关注微信公众号申请验证码查看，发送【验证码】获取验证码，验证码2分钟有效</div>
		<input type="text" id="pass_view" placeholder="输入验证码并提交" style="width:70%"> &nbsp;&nbsp;<input id="submit_pass_view" class="cm-btn success" data-action="gdk_pass_view" data-id="'.$pid.'" type="button" value="提交">
         </div>
      </div>
   </div>
</div>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/jquery@2.1.0/dist/jquery.min.js?ver=2.1"></script>
<script>
	function show_hide_content(a, b) {
		$(a).hide();
		$(a).after("<div class=\"cm-alert success\">" + b + "</div>");
	}
	/**
	 * 点击开启密码可见
	 */
	$("#submit_pass_view").click(function () {
		var ajax_data = {
			action: $("#submit_pass_view").data("action"),
			id: $("#submit_pass_view").data("id"),
			pass: $("#pass_view").val()
		};
		$.post("'.admin_url( 'admin-ajax.php' ).'", ajax_data, function (c) {
			c = $.trim(c);
			if (c !== "400") {
				show_hide_content(".pass_viewbox", c);
				localStorage.setItem("gdk_pass_" + ajax_data["id"], c); /**隐藏内容直接存入浏览器缓存,下次直接读取,ps.有个问题,内容更新会略坑,不管了 */
			} else {
				alert("您的密码错误，请重新申请");
			}
		});
	});


	/**
	 * 已经密码可见的自动从浏览器读取内容
	 * 并显示,这里加个延时处理
	 */
	 
	(function () {
		if ($("#submit_pass_view").length > 0) { /**如果网站有密码可见,就执行 */
			setTimeout(function () {
				var id = "gdk_pass_" + $("#submit_pass_view").data("id"),
					length = localStorage.length;
				for (var i = 0; i < length; i++) {
					var key = localStorage.key(i),
						value = localStorage.getItem(key);
					if (key.indexOf(id) >= 0) { /*发现目标 */
						show_hide_content(".pass_viewbox", value);
						break;
					}
				}

			}, 900);
		}
	}());

	/**密码可见end */
</script>
';

}
add_shortcode('wxcaptcha', 'gdk_secret_view');

//按钮
function wx_captcha_btn() {
	?>
	<script type="text/javascript">
	QTags.addButton( 'wxcaptcha', '微信公众号验证码可见', '[wxcaptcha]', '[/wxcaptcha]\n' );//快捷输入标签
	</script>
	<?php
}
add_action('after_wp_tiny_mce', 'wx_captcha_btn');

/***  WP端结束 ***/

There are only two places you need to configure:

// 此token必须和微信公众平台中的设置保持一致
define('WX_TOKEN', '');
define('WX_QR', '');//公众号二维码

One is wx_token, which can be obtained in the WeChat Official Account management backend, and the other is the QR code image address of your official account.Download Link Usage Method:1. Download and install the plugin. 2. Modify the values of wx_token and wx_qr in the plugin. 3. When publishing articles, use the shortcode [wxcaptcha] and [/wxcaptcha] to wrap the content that needs to be hidden. Author's release address: https://gitcafe.net/archives/10584.html

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Blog Traffic to Official Account Auto-generates Verification Code: WeChat Official Platform Verification Code Viewing Plugin

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