php分页类2

class SubPages{


private $each_disNums ; // 每页显示的条目数

private $nums ; // 总条目数

private $current_page ; // 当前被选中的页

private $sub_pages ; // 每次显示的页数

private $pageNums ; // 总页数

private $page_array = array (); // 用来构造分页的数组

private $subPage_link ; // 每个分页的链接

private $subPage_type ; // 显示分页的类型

/*

__construct是SubPages的构造函数，用来在创建类的时候自动运行.

@$each_disNums 每页显示的条目数

@nums 总条目数

@current_num 当前被选中的页

@sub_pages 每次显示的页数

@subPage_link 每个分页的链接

@subPage_type 显示分页的类型


当@subPage_type=1的时候为普通分页模式

example： 共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]

当@subPage_type=2的时候为经典分页样式

example： 当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]

*/

function __construct( $each_disNums , $nums , $current_page , $sub_pages , $subPage_link , $subPage_type ){

$this -> each_disNums = intval ( $each_disNums );

$this -> nums = intval ( $nums );

if ( ! $current_page ){

$this -> current_page = 1 ;

} else {

$this -> current_page = intval ( $current_page );

}

$this -> sub_pages = intval ( $sub_pages );

$this -> pageNums = ceil ( $nums / $each_disNums );

$this -> subPage_link = $subPage_link ;

$this -> show_SubPages( $subPage_type );

// echo $this->pageNums."--".$this->sub_pages;

}



/*

__destruct析构函数，当类不在使用的时候调用，该函数用来释放资源。

*/

function __destruct(){

unset ( $each_disNums );

unset ( $nums );

unset ( $current_page );

unset ( $sub_pages );

unset ( $pageNums );

unset ( $page_array );

unset ( $subPage_link );

unset ( $subPage_type );

}


/*

show_SubPages函数用在构造函数里面。而且用来判断显示什么样子的分页

*/

function show_SubPages( $subPage_type ){

if ( $subPage_type == 1 ){

$this -> subPageCss1();

} elseif ( $subPage_type == 2 ){

$this -> subPageCss2();

}

}



/*

用来给建立分页的数组初始化的函数。

*/

function initArray(){

for ( $i = 0 ; $i < $this -> sub_pages; $i ++ ){

$this -> page_array[ $i ] = $i ;

}

return $this -> page_array;

}



/*

construct_num_Page该函数使用来构造显示的条目

即使：[1][2][3][4][5][6][7][8][9][10]

*/

function construct_num_Page(){

if ( $this -> pageNums < $this -> sub_pages){

$current_array = array ();

for ( $i = 0 ; $i < $this -> pageNums; $i ++ ){

$current_array [ $i ] = $i + 1 ;

}

} else {

$current_array = $this -> initArray();

if ( $this -> current_page <= 3 ){ // -2左边第2个突出

for ( $i = 0 ; $i < count ( $current_array ); $i ++ ){

$current_array [ $i ] = $i + 1 ;

}

} elseif ( $this -> current_page <= $this -> pageNums && $this -> current_page > $this -> pageNums - $this -> sub_pages + 1 ){

for ( $i = 0 ; $i < count ( $current_array ); $i ++ ){

$current_array [ $i ] = ( $this -> pageNums) - ( $this -> sub_pages) + 1 + $i ;

}

} else {

for ( $i = 0 ; $i < count ( $current_array ); $i ++ ){

$current_array [ $i ] = $this -> current_page - 3 + $i ; // -2左边第2个突出

}

}

}



return $current_array ;

}


/*

构造普通模式的分页

共4523条记录,每页显示10条,当前第1/453页 [首页] [上页] [下页] [尾页]

*/

function subPageCss1(){

$subPageCss1Str = "" ;

$subPageCss1Str .= " 共 " . $this -> nums . " 条记录， " ;

$subPageCss1Str .= " 每页显示 " . $this -> each_disNums . " 条， " ;

$subPageCss1Str .= " 当前第 " . $this -> current_page . " / " . $this -> pageNums . " 页 " ;

if ( $this -> current_page > 1 ){

$firstPageUrl = $this -> subPage_link . " 1 " ;

$prewPageUrl = $this -> subPage_link . ( $this -> current_page - 1 );

$subPageCss1Str .= " [首页] " ;

$subPageCss1Str .= " [上一页] " ;

} else {

$subPageCss1Str .= " [首页] " ;

$subPageCss1Str .= " [上一页] " ;

}



if ( $this -> current_page < $this -> pageNums){

$lastPageUrl = $this -> subPage_link . $this -> pageNums;

$nextPageUrl = $this -> subPage_link . ( $this -> current_page + 1 );

$subPageCss1Str .= " [下一页] " ;

$subPageCss1Str .= " [尾页] " ;

} else {

$subPageCss1Str .= " [下一页] " ;

$subPageCss1Str .= " [尾页] " ;

}



echo $subPageCss1Str ;



}



/*

构造经典模式的分页

当前第1/453页 [首页] [上页] 1 2 3 4 5 6 7 8 9 10 [下页] [尾页]

*/

function subPageCss2(){

$subPageCss2Str = "" ;

$subPageCss2Str .= " 当前第 " . $this -> current_page . " / " . $this -> pageNums . " 页 " ;





if ( $this -> current_page > 1 ){

$firstPageUrl = $this -> subPage_link . " 1 " ;

$prewPageUrl = $this -> subPage_link . ( $this -> current_page - 1 );

$subPageCss2Str .= " [首页] " ;

$subPageCss2Str .= " [上一页] " ;

} else {

$subPageCss2Str .= " [首页] " ;

$subPageCss2Str .= " [上一页] " ;

}



$a = $this -> construct_num_Page();

for ( $i = 0 ; $i < count ( $a ); $i ++ ){

$s = $a [ $i ];

if ( $s == $this -> current_page ){

$subPageCss2Str .= " [ " . $s . " ] " ;

} else {

$url = $this -> subPage_link . $s ;

$subPageCss2Str .= " [ " . $s . " ] " ;

}

}



if ( $this -> current_page < $this -> pageNums){

$lastPageUrl = $this -> subPage_link . $this -> pageNums;

$nextPageUrl = $this -> subPage_link . ( $this -> current_page + 1 );

$subPageCss2Str .= " [下一页] " ;

$subPageCss2Str .= " [尾页] " ;

} else {

$subPageCss2Str .= " [下一页] " ;

$subPageCss2Str .= " [尾页] " ;

}

echo $subPageCss2Str ;

}

}

?>

代码 :


// require_once("SubPages.php");

//每页显示的条数

$page_size = 20 ;

// 总条目数

$nums = 1024 ;

// 每次显示的页数

$sub_pages = 10 ;

// 得到当前是第几页

$pageCurrent = $_GET [ " p " ];

// if(!$pageCurrent) $pageCurrent=1;


$subPages = new SubPages( $page_size , $nums , $pageCurrent , $sub_pages , " a.php?p= " , 2 );

?>


if ( empty ( $_GET [ " p " ]))
{
$pageCurrent2 = 0 ; // limit 从0开始
$page_size2 = 3 ; // 到2结束，一共3条数据每页
}
else
{ $pageCurrent2 = $_GET [ " p " ] * 3 - 3 ; // 计算每页开始第一条的参数
$page_size2 = $pageCurren2 + 3 ; // 每页显示3条数据
}
$sql = " select * from art " ;
$sql = sprintf ( " %s limit %d, %d " , $sql , $pageCurrent2 , $page_size2 );
$ni = new Mysql ( " 127.0.0.1 " , " root " , " 123 " , " school " );

echo "
" ;
$sql2 = " select * from art " ;
$nums = $ni -> Number ( $sql2 );
// echo "QQ".$nums;




$result = $ni -> Query( $sql );
while ( $rows = $ni -> fetch_array( $result ))
{
echo "
" ;
echo $rows [ ' title ' ];
echo "
" ;


}
$page_size = 3 ;
$sub_pages = 10 ;
$pageCurrent = $_GET [ " p " ];
$subPages = new SubPages( $page_size , $nums , $pageCurrent , $sub_pages , " a.php?p= " , 2 );


?>