本文實例講述了PHP實現(xiàn)的簡單分頁類及用法。分享給大家供大家參考,具體如下:
<?php
/*
* 使用:
* $page = new Page(連接符,查詢語句,當(dāng)前頁碼,每頁大小,頁碼符)
* 連接符:一個MYSQL連接標(biāo)識符,如果該參數(shù)留空,則使用最近一個連接
* 查詢語句:SQL語句
* 當(dāng)前頁碼:指定當(dāng)前是第幾頁
* 每頁大小:每頁顯示的記錄數(shù)
* 頁碼符:指定當(dāng)前頁面URL格式
*
* 使用例子:
* $sql = "select * from aa";
* $page = new Page($conn,$sql,$_GET['page'],4,"?page=");
*
* 獲得當(dāng)前頁碼
* $page->page;
*
* 獲得總頁數(shù)
* $page->pageCount;
*
* 獲得總記錄數(shù)
* $page->rowCount;
*
* 獲得本頁記錄數(shù)
* $page->listSize;
*
* 獲得記錄集
* $page->list;
* 記錄集是一個2維數(shù)組,例:list[0]['id']訪問第一條記錄的id字段值.
*
* 獲得頁碼列表
* $page->getPageList();
*/
class Page
{
//基礎(chǔ)數(shù)據(jù)
var $sql;
var $page;
var $pageSize;
var $pageStr;
//統(tǒng)計數(shù)據(jù)
var $pageCount; //頁數(shù)
var $rowCount; //記錄數(shù)
//結(jié)果數(shù)據(jù)
var $list = array(); //結(jié)果行數(shù)組
var $listSize ;
//構(gòu)造函數(shù)
function Page($conn,$sql_in,$page_in,$pageSize_in,$pageStr_in)
{
$this->sql = $sql_in;
$this->page = intval($page_in);
$this->pageSize = $pageSize_in;
$this->pageStr = $pageStr_in;
//頁碼為空或小于1的處理
if(!$this->page||$this->page<1)
{
$this->page = 1;
}
//查詢總記錄數(shù)
$rowCountSql = preg_replace("/([\w\W]*?select)([\w\W]*?)(from[\w\W]*?)/i","$1 count(0) $3",$this->sql);
if(!$conn)
$rs = mysql_query($rowCountSql) or die("bnc.page: error on getting rowCount.");
else
$rs = mysql_query($rowCountSql,$conn) or die("bnc.page: error on getting rowCount.");
$rowCountRow = mysql_fetch_row($rs);
$this->rowCount=$rowCountRow[0];
//計算總頁數(shù)
if($this->rowCount%$this->pageSize==0)
$this->pageCount = intval($this->rowCount/$this->pageSize);
else
$this->pageCount = intval($this->rowCount/$this->pageSize)+1;
//SQL偏移量
$offset = ($this->page-1)*$this->pageSize;
if(!$conn)
$rs = mysql_query($this->sql." limit $offset,".$this->pageSize) or die("bnc.page: error on listing.");
else
$rs = mysql_query($this->sql." limit $offset,".$this->pageSize,$conn) or die("bnc.page: error on listing.");
while($row=mysql_fetch_array($rs))
{
$this->list[]=$row;
}
$this->listSize = count($this->list);
}
/*
* getPageList方法生成一個較簡單的頁碼列表
* 如果需要定制頁碼列表,可以修改這里的代碼,或者使用總頁數(shù)/總記錄數(shù)等信息進(jìn)行計算生成.
*/
function getPageList()
{
$firstPage;
$previousPage;
$pageList;
$nextPage;
$lastPage;
$currentPage;
//如果頁碼>1則顯示首頁連接
if($this->page>1)
{
$firstPage = "<a href=\"".$this->pageStr."1\">首頁</a>";
}
//如果頁碼>1則顯示上一頁連接
if($this->page>1)
{
$previousPage = "<a href=\"".$this->pageStr.($this->page-1)."\">上一頁</a>";
}
//如果沒到尾頁則顯示下一頁連接
if($this->page<$this->pageCount)
{
$nextPage = "<a href=\"".$this->pageStr.($this->page+1)."\">下一頁</a>";
}
//如果沒到尾頁則顯示尾頁連接
if($this->page<$this->pageCount)
{
$lastPage = "<a href=\"".$this->pageStr.$this->pageCount."\">尾頁</a>";
}
//所有頁碼列表
for($counter=1;$counter<=$this->pageCount;$counter++)
{
if($this->page == $counter)
{
$currentPage = "<b>".$counter."</b>";
}
else
{
$currentPage = " "."<a href=\"".$this->pageStr.$counter."\">".$counter."</a>"." ";
}
$pageList .= $currentPage;
}
return $firstPage." ".$previousPage." ".$pageList." ".$nextPage." ".$lastPage." ";
}
}
?>
用法示例:
<?php
@$db = mysql_connect('localhost', 'root', '123456') or
die("Could not connect to database.");//連接數(shù)據(jù)庫
mysql_query("set names 'utf8'");//輸出中文
mysql_select_db('test'); //選擇數(shù)據(jù)庫
$sql = "select * from `users`"; //一個簡單的查詢
$page = new Page('',$sql,$_GET['page'],5,"?page=");
$rows = $page->list;
foreach($rows as $row)
{
echo $row['UserName']."<br>";
}
echo $page->getPageList(); //輸出分頁列表
?>
希望本文所述對大家PHP程序設(shè)計有所幫助。