php微信公众号开发之翻页查询

时间:2022-07-27
本文章向大家介绍php微信公众号开发之翻页查询，主要内容包括其使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。

本文为大家分享了php微信公众号开发之翻页查询的具体代码，供大家参考，具体内容如下

注意：公众号列表最多只能列出8列，超出会报错

  • 分页原理
  • limit 开始位置 , 条数
  • (当前页数 – 1) x 每页条数 ， 每页条数
  • limit (Page – 1) * PageSize ,
  • 0 为开始位置
  • mysql_num_rows 条数
  • require() 与 require_once() 开始加载，错误停止
  • include() 与 include_once() 使用加载，错误跳过
  • ceil 进一 向上取整

原理：

  • 总共10条，每页9条
  • n条
  • sum 总共几页 ceil ( n / 9 )
  • 开始条数 ： （当前页数 – 1 ） x 每页条数
  • （key – 1）* 9

注释：+1 是为了说明有多少页

10 10

核心代码如下：

$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
$fromUsername = $postObj- FromUserName;
$toUsername = $postObj- ToUserName;
$type = $postObj- MsgType;
$customevent = $postObj- Event;
$latitude = $postObj- Location_X;
$longitude = $postObj- Location_Y;
$keyword = trim($postObj- Content);
$time = time();
$textTpl = "<xml 
<ToUserName <![CDATA[%s]] </ToUserName 
<FromUserName <![CDATA[%s]] </FromUserName 
<CreateTime %s</CreateTime 
<MsgType <![CDATA[%s]] </MsgType 
<Content %s</Content 
<FuncFlag 0</FuncFlag 
</xml ";       
switch ($type)
{  
case "event";
if ($customevent=="subscribe")
{$contentStr = "感谢你的关注n栏目正在搭建，敬请期待n回复1看视频教程";}
break;
case "image";
$contentStr = "你的图片很棒！";
break;
case "location";
$contentStr = "你的纬度是{$latitude},经度是{$longitude},我已经锁定！";
break;
case "link" ;
$contentStr = "你的链接有病毒吧！";
break;
case "text";
include("coon.php");
$num = "SELECT * FROM `kecheng` ";
$que=mysql_query($num);
$no=mysql_num_rows($que);//获得条数
$sumpage=ceil($no/7);
$page=(intval($keyword)-1)*7;
$total=$no-$page+1;
if($total 8)
{$total=8;} 
$sql = "SELECT * FROM `kecheng` ORDER BY `id` DESC LIMIT {$page},7";
$query=mysql_query($sql);        
$newsTpl = "<xml 
<ToUserName <![CDATA[%s]] </ToUserName 
<FromUserName <![CDATA[%s]] </FromUserName 
<CreateTime %s</CreateTime 
<MsgType <![CDATA[news]] </MsgType 
<ArticleCount $total</ArticleCount 
<Articles 
<item 
<Title <![CDATA[总共{$sumpage}页，输入页数翻页]] </Title 
<Description <![CDATA[]] </Description 
<PicUrl http://autoguitar.duapp.com/1.jpg</PicUrl 
<Url <![CDATA[]] </Url 
</item ";
while($rs=mysql_fetch_array($query)){    
$newsTpl.="<item 
<Title $rs[content]</Title  
<Description <![CDATA[]] </Description 
<PicUrl http://dq095.applinzi.com/2.jpg</PicUrl 
<Url <![CDATA[]] </Url 
</item ";
}
$newsTpl.="</Articles 
<FuncFlag 0</FuncFlag 
</xml ";
$myresultStr = sprintf($newsTpl, $fromUsername, $toUsername, $time);
echo $myresultStr;
break;         
default;
$contentStr ="此项功能尚未开发";  
}
$msgType="text";
$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
echo $resultStr;

coon.php连接数据库代码如下：

<?php
//用 户 名 : $user
//密　　码 : $pwd
//主库域名 : $host
//从库域名 : SAE_MYSQL_HOST_S
//端　　口 : $port
//数据库名 : $dbname
$dbname = "app_dq095";
$host = "w.rdc.sae.sina.com.cn";
$port = "3306";
$user = "4k514n103z";
$pwd = "2402314li2j1i5im1xy2xizj5y332w2x41k2z203";
/*接着调用mysql_connect()连接服务器*/
// 连主库
$db = mysql_connect($host,$user,$pwd);
if(!$db){
die("Connect Server Failed: " . mysql_error($db));
}
/*连接成功后立即调用mysql_select_db()选中需要连接的数据库*/
if (!mysql_select_db($dbname)) {
die("Select Database Failed: " . mysql_error($db));
}
mysql_query("set names utf-8",$db); 
/*至此连接已完全建立，就可对当前数据库进行相应的操作了*/
/*！！！注意，无法再通过本次连接调用mysql_select_db来切换到其它数据库了！！！*/
/* 需要再连接其它数据库，请再使用mysql_connect+mysql_select_db启动另一个连接*/
/**
* 接下来就可以使用其它标准php mysql函数操作进行数据库操作
*/

index.php整体代码如下：

<?php
/**
* wechat php test
*/
//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj- responseMsg();
class wechatCallbackapiTest
{
public function valid()
{
$echoStr = $_GET["echostr"];
//valid signature , option
if($this- checkSignature()){
echo $echoStr;
exit;
}
}
public function responseMsg()
{
//get post data, May be due to the different environments
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
//extract post data
if (!empty($postStr)){
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
$fromUsername = $postObj- FromUserName;
$toUsername = $postObj- ToUserName;
$type = $postObj- MsgType;
$customevent = $postObj- Event;
$latitude = $postObj- Location_X;
$longitude = $postObj- Location_Y;
$keyword = trim($postObj- Content);
$time = time();
$textTpl = "<xml 
<ToUserName <![CDATA[%s]] </ToUserName 
<FromUserName <![CDATA[%s]] </FromUserName 
<CreateTime %s</CreateTime 
<MsgType <![CDATA[%s]] </MsgType 
<Content %s</Content 
<FuncFlag 0</FuncFlag 
</xml ";       
switch ($type)
{  
case "event";
if ($customevent=="subscribe")
{$contentStr = "感谢你的关注n栏目正在搭建，敬请期待n回复1看视频教程";}
break;
case "image";
$contentStr = "你的图片很棒！";
break;
case "location";
$contentStr = "你的纬度是{$latitude},经度是{$longitude},我已经锁定！";
break;
case "link" ;
$contentStr = "你的链接有病毒吧！";
break;
case "text";
include("coon.php");
$num = "SELECT * FROM `kecheng` ";
$que=mysql_query($num);
$no=mysql_num_rows($que);//获得条数
$sumpage=ceil($no/7);
$page=(intval($keyword)-1)*7;
$total=$no-$page+1;
if($total 8)
{$total=8;} 
$sql = "SELECT * FROM `kecheng` ORDER BY `id` DESC LIMIT {$page},7";
$query=mysql_query($sql);        
$newsTpl = "<xml 
<ToUserName <![CDATA[%s]] </ToUserName 
<FromUserName <![CDATA[%s]] </FromUserName 
<CreateTime %s</CreateTime 
<MsgType <![CDATA[news]] </MsgType 
<ArticleCount $total</ArticleCount 
<Articles 
<item 
<Title <![CDATA[总共{$sumpage}页，输入页数翻页]] </Title 
<Description <![CDATA[]] </Description 
<PicUrl http://autoguitar.duapp.com/1.jpg</PicUrl 
<Url <![CDATA[]] </Url 
</item ";
while($rs=mysql_fetch_array($query)){    
$newsTpl.="<item 
<Title $rs[content]</Title  
<Description <![CDATA[]] </Description 
<PicUrl http://dq095.applinzi.com/2.jpg</PicUrl 
<Url <![CDATA[]] </Url 
</item ";
}
$newsTpl.="</Articles 
<FuncFlag 0</FuncFlag 
</xml ";
$myresultStr = sprintf($newsTpl, $fromUsername, $toUsername, $time);
echo $myresultStr;
break;         
default;
$contentStr ="此项功能尚未开发";  
}
$msgType="text";
$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
echo $resultStr;
}
}
private function checkSignature()
{
$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];  
$token = TOKEN;
$tmpArr = array($token, $timestamp, $nonce);
sort($tmpArr);
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );
if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
}
?

以上就是本文的全部内容，希望对大家的学习有所帮助。

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