suchen

Heim  >  Artikel  >  Backend-Entwicklung  >  PHP中常用的分页类总结_PHP教程

PHP中常用的分页类总结_PHP教程

WBOY
WBOYOriginal
2016-07-20 11:11:30976Durchsuche

分页是目前在显示大量结果时所采用的最好的方式。有了下面这些代码的帮助，开发人员可以在多个页面中显示大量的数据。在互联网上，分​页是一般用于搜索结果或是浏览全部信息

php基本分页

 代码如下 复制代码

// 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 // 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 echo " ";
// get previous page num
$prevpage = $currentpage - 1;
// show echo " ";
} // end if

// loop to show links to range of pages around current page
for ($x = ($currentpage - $range); $x // if it's a valid page number...
if (($x > 0) && ($x // if we're on current page...
if ($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 ******/
?>

先看一个常用的php分页类

 代码如下 复制代码

 /*
  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 .= "

n";  
 }
?>

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

=$pagination?>
 


实例

 代码如下 复制代码

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->pageCountpageCount;
        //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             for($i=0;$ipageCount;$i++){
                array_push($pageList,$i+1);
            }
        }else{
            if($this->pageNo                 for($i=0;$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 && $this->pageNo pageCount - 4){
                array_push($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 ="

");
        return $pageString;
    }
}

?>

css代码

 代码如下 复制代码

-->

在php页面中的调用方法

 代码如下 复制代码

　　　　$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();

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/444637.htmlTechArticle分页是目前在显示大量结果时所采用的最好的方式。有了下面这些代码的帮助，开发人员可以在多个页面中显示大量的数据。在互联网上，...
Stellungnahme：
Der Inhalt dieses Artikels wird freiwillig von Internetnutzern beigesteuert und das Urheberrecht liegt beim ursprünglichen Autor. Diese Website übernimmt keine entsprechende rechtliche Verantwortung. Wenn Sie Inhalte finden, bei denen der Verdacht eines Plagiats oder einer Rechtsverletzung besteht, wenden Sie sich bitte an admin@php.cn
Vorheriger Artikel：PHP中向socket服务器收发数据_PHP教程Nächster Artikel：PHP手机号归属地查询程序代码_PHP教程

In Verbindung stehende Artikel

Mehr sehen