PHP中常用的分页类总结

// database connection info
$conn = mysql_connect('localhost','dbusername','dbpass') or trigger_error("SQL", E_USER_ERROR);
$db = mysql_select_db('dbname',$conn) or trigger_error("SQL", E_USER_ERROR);

// find out how many rows are in the table
$sql = "SELECT COUNT(*) FROM numbers";
$result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR);
$r = mysql_fetch_row($result);
$numrows = $r[0];

// number of rows to show per page
$rowsperpage = 10;
// find out total pages
$totalpages = ceil($numrows / $rowsperpage);

// get the current page or set a default
if (isset($_GET['currentpage']) && is_numeric($_GET['currentpage'])) {
// cast var as int
$currentpage = (int) $_GET['currentpage'];
} else {
// default page num
$currentpage = 1;
} // end if

// if current page is greater than total pages...
if ($currentpage > $totalpages) {
// set current page to last page
$currentpage = $totalpages;
} // end if
// if current page is less than first page...
if ($currentpage < 1) {
// set current page to first page
$currentpage = 1;
} // end if

// the offset of the list, based on current page
$offset = ($currentpage - 1) * $rowsperpage;

// get the info from the db
$sql = "SELECT id, number FROM numbers LIMIT $offset, $rowsperpage";
$result = mysql_query($sql, $conn) or trigger_error("SQL", E_USER_ERROR);

// while there are rows to be fetched...
while ($list = mysql_fetch_assoc($result)) {
// echo data
echo $list['id'] . " : " . $list['number'] . "
";
} // end while

/****** build the pagination links ******/
// range of num links to show
$range = 3;

// if not on page 1, don't show back links
if ($currentpage > 1) {
// show << link to go back to page 1
echo " << ";
// get previous page num
$prevpage = $currentpage - 1;
// show < link to go back to 1 page
echo " < ";
} // end if

// loop to show links to range of pages around current page
for ($x = ($currentpage - $range); $x < (($currentpage + $range) + 1); $x++) {
// if it's a valid page number...
if (($x > 0) && ($x <= $totalpages)) {
// if we're on current page...
if ($x == $currentpage) {
// 'highlight' it but don't make a link
echo " [$x] ";
// if not current page...
} else {
// make it a link
echo " $x ";
} // end else
} // end if
} // end for

// if not on last page, show forward and last page links
if ($currentpage != $totalpages) {
// get next page
$nextpage = $currentpage + 1;
// echo forward link for next page
echo " > ";
// echo forward link for lastpage
echo " >> ";
} // end if
/****** end build pagination links ******/
?>

 /*
  Place code to connect to your DB here.
 */
 include('config.php'); // include your code to connect to DB.

 $tbl_name="";  //your table name
 // How many adjacent pages should be shown on each side?
 $adjacents = 3;
 
 /*
    First get total number of rows in data table.
    If you have a WHERE clause in your query, make sure you mirror it here.
 */
 $query = "SELECT COUNT(*) as num FROM $tbl_name";
 $total_pages = mysql_fetch_array(mysql_query($query));
 $total_pages = $total_pages[num];
 
 /* Setup vars for query. */
 $targetpage = "filename.php";  //your file name  (the name of this file)
 $limit = 2;         //how many items to show per page
 $page = $_GET['page'];
 if($page)
  $start = ($page - 1) * $limit;    //first item to display on this page
 else
  $start = 0;        //if no page var is given, set start to 0
 
 /* Get data. */
 $sql = "SELECT column_name FROM $tbl_name LIMIT $start, $limit";
 $result = mysql_query($sql);
 
 /* Setup page vars for display. */
 if ($page == 0) $page = 1;     //if no page var is given, default to 1.
 $prev = $page - 1;       //previous page is page - 1
 $next = $page + 1;       //next page is page + 1
 $lastpage = ceil($total_pages/$limit);  //lastpage is = total pages / items per page, rounded up.
 $lpm1 = $lastpage - 1;      //last page minus 1
 
 /*
  Now we apply our rules and draw the pagination object.
  We're actually saving the code to a variable in case we want to draw it more than once.
 */
 $pagination = "";
 if($lastpage > 1)
 { 
  $pagination .= "

    while($row = mysql_fetch_array($result))
  {
 
  // Your while loop here
 
  }
 ?>

class PageView{
    /**页码**/
    public $pageNo = 1;
    /**页大小**/
    public $pageSize = 20;
    /**共多少页**/
    public $pageCount = 0;
    /**总记录数**/
    public $totalNum = 0;
    /**偏移量,当前页起始行**/
    public $offSet = 0;
    /**每页数据**/
    public $pageData = array();
   
    /**是否有上一页**/
    public $hasPrePage = true;
    /**是否有下一页**/
    public $hasNextPage = true;
   
    public $pageNoList = array();
   
    public $jsFunction ='jsFunction';
    /**
     *
     * @param unknown_type $count 总行数
     * @param unknown_type $size 分页大小
     * @param unknown_type $string
     */
    public function __construct($count=0, $size=20,$pageNo=1,$pageData =array(),$jsFunction='jsFunction'){

        $this->totalNum = $count;//总记录数
        $this->pageSize = $size;//每页大小
        $this->pageNo = $pageNo;
        //计算总页数
        $this->pageCount = ceil($this->totalNum/$this->pageSize);
        $this->pageCount = ($this->pageCount<=0)?1:$this->pageCount;
        //检查pageNo
        $this->pageNo = $this->pageNo == 0 ? 1 : $this->pageNo;
        $this->pageNo = $this->pageNo > $this->pageCount? $this->pageCount : $this->pageNo;
       
        //计算偏移
        $this->offset = ( $this->pageNo - 1 ) * $this->pageSize;
        //计算是否有上一页下一页
        $this->hasPrePage = $this->pageNo == 1 ?false:true;

        $this->hasNextPage = $this->pageNo >= $this->pageCount ?false:true;
       
        $this->pageData = $pageData;
        $this->jsFunction = $jsFunction;
       
    }
    /**
     * 分页算法
     * @return
     */
    private function generatePageList(){
        $pageList = array();
        if($this->pageCount <= 9){
            for($i=0;$i<$this->pageCount;$i++){
                array_push($pageList,$i+1);
            }
        }else{
            if($this->pageNo <= 4){
                for($i=0;$i<5;$i++){
                    array_push($pageList,$i+1);
                }
                array_push($pageList,-1);
                array_push($pageList,$this->pageCount);

            }else if($this->pageNo > $this->pageCount - 4){
                array_push($pageList,1);
               
                array_push($pageList,-1);
                for($i=5;$i>0;$i--){
                    array_push($pageList,$this->pageCount - $i+1);
                }
            }else if($this->pageNo > 4 && $this->pageNo <= $this->pageCount - 4){
                array_push($pageList,1);
                array_push($pageList,-1);
               
                array_push($pageList,$this->pageNo -2);
                array_push($pageList,$this->pageNo -1);
                array_push($pageList,$this->pageNo);
                array_push($pageList,$this->pageNo + 1);
                array_push($pageList,$this->pageNo + 2);
               
                array_push($pageList,-1);
                array_push($pageList,$this->pageCount);
               
            }
        }
        return $pageList;
    }

    /***
     * 创建分页控件
    * @param
    * @return String
    */
    public function echoPageAsDiv(){
        $pageList = $this->generatePageList();
       
        $pageString ="

?>

　　　　$pageNo = $_GET['pageNo'];
        if(empty($pageNo)){
            $pageNo = 1;
        }
        //分页数据
        $pageData = News::getNewsPage($pageNo,$pageSize);
       //取得总行数
        $count = News::getNewsCount();
        //创建分页器
        $p = new PageView($count['0']['TOTAL'],$pageSize,$pageNo,$pageData);
　　　　 //生成页码
        $pageViewString = $p->echoPageAsDiv();