php+smarty分页原理与分页代码分享

include_once("smarty.class.php");
class smartyproject extendssmarty
{
function __construct()
 {
 $this->config_dir="smarty/smarty/config_file.class.php";
 $this->caching=false;
 $this->template_dir = "smarty/templates/";
 $this->cache_dir = "smarty/smarty_cache/";
 $this->left_delimiter = "{";
 $this->right_delimiter = "}";
 }
}
?>

2，adodb，连接数据库类：

class conndb
{
var $dbtype;
var $host;
var $user;
var $pwd;
var $dbname;
var $debug;//false不显示侦错信息，反之，显示
var $conn;
function __construct($dbtype,$host,$user,$pwd,$dbname,$debug=false)
{
 $this->dbtype = $dbtype;
 $this->host = $host;
 $this->user = $user;
 $this->pwd = $pwd;
 $this->dbname = $dbname;
 $this->debug = $debug;
}
//实现数据库的连接并返回连接对象(个人理解可以说返回adodb对象)
function getconnid()
{
 include_once('adodb5/adodb.inc.php');
 if($this->dbtype == "mysql" || $this->dbtype == "mssql")
 {
if($this->dbtype == "mysql")
{
 $this->conn = newadoconnection("mysql");//创建adodb对象，声明数据库类型为mysql
}
else
{
 $this->conn = newadoconnection("mssql");
}
$this->conn->connect($this->host,$this->user,$this->pwd,$this->dbname);

 }
 else if($this->dbtype == "access")
 {
$this->conn = newadoconnection("access");
$this->conn->connect("driver={microsoft access driver (*.mdb)};dbq=".$this->dbname.";uid=".$this->user.";pwd=".$this->pwd.";");
 }

 $this->conn->execute("set names utf-8");

 if($this->dbtype == "mysql")
 {
$this->conn->debug = $this->debug;
 }
 return $this->conn;

}
function closeconnid()//关闭与数据库的连接
{
 $this->conn->disconnection();
}
}

3，数据库操作类：

class admindb
{
 var $sqlstr;
 var $conn;
 var $sqltype;
 var $rs;
 var $array;
 function execsql($sqlstr,$conn)
 {
$rs = $conn->execute($sqlstr);
$sqltype = strtolower(substr(trim($sqlstr),0,6)); //strtolower() 函数把字符串转换为小写。
if($sqltype = "select")
{
 $array = $rs->getrows(); // 类似mysql_fetch_array函数返回的数组
 if(count($array) == 0 || $rs == false)
 {
return false;
 }
 else
 {
return $array;
 }
}
else if($sqltype = "update"||$sqltype = "insert"||$sqltype = "delete")
{
 if($rs)
 {
return true;
 }
 else
 {
return false;
 }
}
 }
}

4，分页类：

class seppage
{
var $rs;
var $pagesize;
var $nowpage;
var $array;
var $conn;
var $sqlstr;
function showdate($sqlstr,$conn,$pagesize,$nowpage)
{
 if(!isset($nowpage)||$nowpage=="")
 {
$nowpage = 1 ;
 }
 else
 {
$this->nowpage = $nowpage;
 }
 $this->pagesize = $pagesize;
 $this->conn = $conn;
 $this->sqlstr = $sqlstr;
 $this->rs = $this->conn->pageexecute($this->sqlstr,$this->pagesize,$this->nowpage);
 //pageexecute($sql, $nrows, $page, $inputarr=false) 使用资料集的页码功能，叁数 $page 是以 1 为启使值
$this->array = $this->rs->getrows();
if(count($this->array) == 0 || $this->rs == false)
{
 return false;
}
else
{
 return $this->array;
}

}
function showpage($contentname,$utits,$anothersearchstr,$class)
{
 $allrs=$this->conn->execute($this->sqlstr);
 $record=count($allrs->getrows());
 $pagecount=ceil($record/$this->pagesize);

 $str.="共有".$contentname." ".$record." ".$utits." 每页显示 ".$this->pagesize." ".$utits." 第 ".$this->rs->absolutepage()." 页/共 ".$pagecount." 页";
 $str.="    ";
 if(!$this->rs->atfirstpage())
 {
$str.="首页";
 }
 else
 {
$str.="首页";
 }
 $str.=" ";
 if(!$this->rs->atfirstpage())
 {
$str.="rs->absolutepage()-1).$anothersearchstr." class=".$class.">上一页";
 }
 else
 {
$str.="上一页";
 }
 $str.=" ";
 if(!$this->rs->atlastpage())
 {
$str.="rs->absolutepage()+1).$anothersearchstr." class=".$class.">下一页";
 }
 else
 {
$str.="下一页";
 }
 $str.=" ";

 if(!$this->rs->atlastpage())
 {
$str.="尾页";
 }
 else
 {
$str.="尾页";
 }
 if(count($this->array)==0 || $this->rs==false)
 {
 return "";
 }
 else
 {
 return $str;
 }
 }
}

5，文章字符转换处理的类：

class usefun
{

 function unhtml($text)
 {
$content=(nl2br(htmlspecialchars($text)));//htmlspecialchars() 函数把一些预定义的字符转换为 html 实体,nl2br() 函数在字符串中的每个新行 (/n) 之前插入 html 换行符 ()。
$content=str_replace("[strong]","",$content);
$content=str_replace("[/strong]","
$content=str_replace("[em]","",$content);
$content=str_replace("[/em]","
$content=str_replace("[u]","",$content);
$content=str_replace("[/u]","


$content=str_replace("[font color=#ff0000]","",$content);
$content=str_replace("[font color=#00ff00]","",$content);
$content=str_replace("[font color=#0000ff]","",$content);

将以上四个类全部放到一个类文件system.class.inc.php里.

另外几个文件： 1、system.inc.php:

 session_start();
 include_once("smarty_inc.php");
 include_once("system.class.inc.php");
 //数据库连接类实例化
 $connobj = new conndb("mysql","localhost","root","vertrigo","db_fenye",false);
 $conn = $connobj->getconnid();
 //数据库操作类实例化
 $admindb = new admindb();
 //分页类实例化
 $seppage=new seppage();
 //使用常用函数类实例化
 $usefun=new usefun();
 //调用smarty模板
 $smarty=new smartyproject();
 function unhtml($params)
 {
 extract($params);
 $text=$content;
 global $usefun;
 return $usefun->unhtml($text);
 }
 $smarty->register_function("unhtml","unhtml");
?>

2、执行文件，index.php:

include_once("system.inc.php");
$arraybbstell = $admindb->execsql("select * from tb_bookinfo",$conn);
if(!$arraybbstell)
{
 $smarty->assign("isbbstell","t");
}
else
{
 $smarty->assign("isbbstell",t);
 $smarty->assign("arraybbstell",$arraybbstell);
}
$arraybbs = $seppage->showdate("select * from tb_bookinfo",$conn,1,$_get["page"]);
if(!$arraybbs)
{
 $smarty->assign("isbbs",f);

}
else
{
 $smarty->assign("isbbs",t);
 $smarty->assign("showpage",$seppage->showpage("帖子","条","","a1"));
 $smarty->assign("arraybbs",$arraybbs);
}
$smarty->display("index.html");
?>

3、解析文件,index.html:

椤垫ā







 

{if $isbbs=="t"}