WordPress上发布一篇文章，为了让真实用户才能看到隐藏部分的内容，这时候可以让用户关注微信公众号，发送指定的验证码，验证成功后显示隐藏的内容，间接的也为公众号引流。
开始
首先是要怎样指定文章中的那部分内容隐藏。
发布文章时，将需要隐藏的内容放在<yg_wx>和</yg_wx>中间，例如“<yg_wx>这里是要隐藏的内容</yg_wx>”。
add_filter('the_content', 'weixin_secret');
function weixin_secret($content){
global $post,$wpdb;
$post_id = $post->ID;
if (preg_match_all('#<yg_wx>([\s\S]*?)</yg_wx>#i', $content, $secret_content)){
$user_id = is_user_logged_in() ? wp_get_current_user()->ID : 0;
$ygwx = new YGWX($post_id, $user_id);
if( !$ygwx->is_paid() ){
$secret_notice = '<style type="text/css">.erphp-wx {background-color: #fff;border: 2px dashed #ff5f33;color: #333;font-size: 14px;line-height: inherit;padding: 5px 10px;}</style>
<div class="erphp-wx">
您需要关注公众号并发送验证码，验证成功后才能查看此处内容！<a href="javascript:;" class="erphp-wx-loader" data-post="'.$post_id.'" >立即关注</a>
</div>
<script type="text/javascript" src="/static/js/wpwx.js?v=1.0"></script>
<script type="text/javascript" src="//www.layuicdn.com/layui/layui.js"></script>
<link rel="stylesheet" href="//www.layuicdn.com/layui/css/layui.css" type="text/css"/>
';
$content = str_replace($secret_content[0], $secret_notice, $content);
}
}
return $content;
}
点击“立即关注”后，生成随机的6位验证码，Ajax传到前台。
前端代码：
var ygwx_order;
var ygwx_timer;
/**
* 立即关注
*/
$(".erphp-wx-loader").on("click",function(){
var post_id = $(this).data("post");
console.log('立即关注', post_id);
clearInterval(ygwx_order);
clearInterval(ygwx_timer);
var layer = layui.layer;
$.ajax({
url: '/wp-admin/admin-ajax.php',
type: 'POST',
data: {action:'ygwx' ,post_id: post_id },
dataType: 'json',
success:function(data){
//console.log('xx', data);
let code = data.code;
let qrcode = data.qrcode;
var alert1 = layer.open({
title: '',
// shade: 0.8
shade: ["0.4","#ddd"],
// shade: false
btn: [], //默认有‘确定’按钮，去掉
content: '<div class="yg-open"><div><img class="weixin-qrcode" src="'+qrcode+'" /></div><div>扫码关注公众号，发送验证码【'+code+'】至该公众号。</div><div class="ygtime"></div></div>',
end: function(){
//点击关闭后回调
//layer.msg('close');//layer.closeAll();
clearInterval(ygwx_order);
clearInterval(ygwx_timer);
}
});
var m = data.minute;
ygwx_order = setInterval(function() {
$.post('/wp-admin/admin-ajax.php', {
"action": "ygwx_wx",
"post_id": post_id,
"order_num": data.num
}, function(data) {
if(data.status == "1"){
clearInterval(ygwx_order);
layer.msg("验证成功",{
icon: 6,
time: 1000
},function(){
location.reload();
});
}
});
}, 5000);
var s = 0;
ygwxCountdown();
ygwx_timer = setInterval(function(){ ygwxCountdown(); },1000);
function ygwxCountdown(){
$(".ygtime").html("验证倒计时：<span>0"+m+"分"+s+"秒</span>");
if( m == 0 && s == 0 ){
clearInterval(ygwx_order);
clearInterval(ygwx_timer);
//console.log('监听结束.....2');
layer.msg('验证码超时，请重新获取');
layer.closeAll();
m = 4;
s = 59;
}else if( m >= 0 ){
if( s > 0 ){
s--;
}else if( s == 0 ){
m--;
s = 59;
}
}
}
},
error:function(e){
console.log('ee', e);
layer.msg('调取微信公众号失败');
}
});
}); 后台钩子代码：
/***********************************************************************/
function ygwx_callback(){
$post_id = $_POST['post_id'];
$user_id = is_user_logged_in() ? wp_get_current_user()->ID : 0;
$code='';
$msg='';$num='';$status=400;$minute=0;
$qrcode='';
$out_trade_no = date("ymdhis").mt_rand(100,999).mt_rand(100,999).mt_rand(100,999);
$minute = 3;
if(1==1){
$ygwx = new YGWX($post_id, $user_id);
$code = '123456';//随机6位数字，这里就先固定了
if($ygwx->add($out_trade_no, $code)){
$num = $out_trade_no;
$status=200;
}
}
$result = array(
'status' => $status,
'code' => $code,
'qrcode'=> '微信二维码地址',
'num' => $num,
'minute' => $minute,
'msg' => $msg
);
header('Content-type: application/json');
echo json_encode($result);
exit;
}
add_action( 'wp_ajax_ygwx', 'ygwx_callback');
add_action( 'wp_ajax_nopriv_ygwx', 'ygwx_callback');
/***********************************************************************/
/****************************定时查询是否已经验证成功*******************************************/
function ygwx_wx_callback(){
$post_id = $_POST['post_id'];
$order_num = $_POST['order_num'];
$status = 0;
$user_id = is_user_logged_in() ? wp_get_current_user()->ID : 0;
$ygwx = new YGWX($post_id, $user_id);
if($ygwx->check_send($order_num)){
$days = 1;
$expire = time() + $days*24*60*60;
setcookie('ygwx_'.$post_id, $wppay->set_key($order_num), $expire, '/', $_SERVER['HTTP_HOST'], false);
$status = 1;
}
$result = array(
'status' => $status
);
header('Content-type: application/json');
echo json_encode($result);
exit;
}
add_action( 'wp_ajax_ygwx_wx', 'ygwx_wx_callback');
add_action( 'wp_ajax_nopriv_ygwx_wx', 'ygwx_wx_callback');
/****************************定时查询是否已经验证成功*******************************************/classYGWX代码：
<?php
class YGWX{
private $ip;
public $post_id;
public $user_id;
public function __construct($post_id, $user_id){
$this->ip = $_SERVER['REMOTE_ADDR'];
$this->post_id = $post_id;
$this->user_id = $user_id?$user_id:0;
}
public function check_send($order_num){
global $wpdb, $ygwx_table_name;
$wppay_check = $wpdb->get_var($wpdb->prepare("SELECT id FROM $ygwx_table_name
WHERE post_id = %d
AND order_status = 1
AND order_num = %s", $this->post_id, $order_num));
$wppay_check = intval($wppay_check);
return $wppay_check && $wppay_check > 0;
}
public function add($order_num,$code){
date_default_timezone_set('Asia/Shanghai');
global $wpdb, $ygwx_table_name;
$result = $wpdb->insert($ygwx_table_name, array(
'order_num' => $order_num,
'post_id' => $this->post_id,
'user_id' => $this->user_id,
'create_time' => date("Y-m-d H:i:s"),
'order_code' =>$code,
'ip_address' => $this->ip), array('%s', '%d', '%s', '%s', '%s', '%s'));
if($result){
return true;
}
return false;
}
public function is_paid(){
global $wpdb, $ygwx_table_name;
if( isset($_COOKIE['ygwx_'.$this->post_id]) ){
$order_num = $this->get_key($_COOKIE['ygwx_'.$this->post_id]);
$wppay_check = $wpdb->get_var($wpdb->prepare("SELECT id FROM $ygwx_table_name
WHERE post_id = %d
AND order_status = 1
AND order_num = %s", $this->post_id, $order_num));
$wppay_check = intval($wppay_check);
return $wppay_check && $wppay_check > 0;
}
return 0;
}
public function get_key($key){
return str_replace( md5('1234'), '', base64_decode($key) );
}
public function set_key($order_num){
return base64_encode($order_num.md5('1234'));
}
}下面是接管微信公众号，接收用户发送过来的验证码。
将下面的代码保存至网站根目录，例如：wx.php
微信公众号后台开发者模式，URL填写“http://www.xxx.com/wx.php”，token填写“token”。
define("WEIXIN_TOKEN", "token");
$wechatObj = new WxApi();
$wechatObj->valid();
class WxApi
{
public function valid()
{
$echoStr = $_GET["echostr"];
if($this->checkSignature()){
echo $echoStr;
exit;
}
}
public function responseMsg()
{
//get post data, May be due to the different environments
$postStr = file_get_contents('php://input');
if (!empty($postStr)){
/* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
the best way is to check the validity of xml by yourself */
libxml_use_internal_errors(true);//关闭xml错误
libxml_disable_entity_loader(true);
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
$fromUsername = $postObj->FromUserName;
$toUsername = $postObj->ToUserName;
$msgType = $postObj->MsgType;
$keyword = trim($postObj->Content);
$time = time();
if(!empty( $keyword ) && $msgType == 'text' && preg_match("/^[0-9]{6}$/", $keyword)){
//6位数字
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[%s]]></MsgType>
<Content><![CDATA[%s]]></Content>
</xml>";
$msgType = "text";
$contentStr = '';
//这种方式有问题，像是服务环境的问题
/*
define('WP_USE_THEMES', false);
require('wp-blog-header.php');
define( 'WP_DEBUG_DISPLAY', true );
ini_set( 'display_errors', true );
global $wpdb;
$ygwx_table_name = 'wp_ygwx';
//5分钟内创建的
$ygwx_id = $wpdb->get_var("SELECT id FROM {$ygwx_table_name} WHERE order_code='{$keyword}' and order_status=0 and TIMESTAMPDIFF(SECOND, create_time,now()) <= 300 limit 1");
if($ygwx_id){
//验证成功
$r = $wpdb->query("update {$ygwx_table_name} set order_status=1,order_time=NOW(),openid='{$fromUsername}' where id={$ygwx_id}");
if($r){
$contentStr = '验证成功，请前往页面查看内容。';
}
}else{
$contentStr = '验证码验证失败。';
}
*/
$ygwx_table_name = 'wp_ygwx';
//5分钟内创建的
$ygwx_arr = $this->getOneData("SELECT id FROM {$ygwx_table_name} WHERE order_code='{$keyword}' and order_status=0 and TIMESTAMPDIFF(SECOND, create_time,now()) <= 300 limit 1");
if($ygwx_arr){
//验证成功
$id = $ygwx_arr['id'];
$r = $this->updateData("update {$ygwx_table_name} set order_status=1,order_time=NOW(),openid='{$fromUsername}' where id={$id}");
if($r){
$contentStr = '验证成功，请前往页面查看内容。';
}
}else{
$contentStr = '验证码验证失败。';
}
//file_put_contents("test.txt","*2".$postStr .date('Y-m-d H:i:s')."\r\n",FILE_APPEND);
$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
header("Content-type: application/xml");
echo $resultStr;
exit;
}else{
echo "success";
}
} else {
echo "";
exit;
}
}
private function checkSignature()
{
if (!defined("WEIXIN_TOKEN")) {
throw new Exception('WEIXIN_TOKEN is not defined!');
}
$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];
$token = WEIXIN_TOKEN;
$tmpArr = array($token, $timestamp, $nonce);
// use SORT_STRING rule
sort($tmpArr, SORT_STRING);
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );
if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
/**
* 返回一条数据
*/
public function getOneData($sql){
require('wp-config.php');
$mysql_server="localhost";
$mysql_username = DB_USER;
$mysql_password= DB_PASSWORD;
$mysql_database= DB_NAME;
$db=new mysqli($mysql_server,$mysql_username,$mysql_password,$mysql_database);
if(mysqli_connect_error()){
echo 'Could not connect to database.';
exit;
}
$result=$db->query($sql);
$row=$result->fetch_assoc();
mysqli_close($db);
return $row;
}
public function updateData($sql){
require('wp-config.php');
$mysql_server="localhost";
$mysql_username = DB_USER;
$mysql_password= DB_PASSWORD;
$mysql_database= DB_NAME;
$db=new mysqli($mysql_server,$mysql_username,$mysql_password,$mysql_database);
if(mysqli_connect_error()){
echo 'Could not connect to database.';
exit;
}
$x=mysqli_query($db, $sql);
mysqli_close($db);
return $x;
}
}
以上代码大概就实现了需要的功能。