分页页码显示算法
/**
* 获取分页的HTML内容
* @param integer $page 当前页
* @param integer $pages 总页数
* @param string $url 跳转url地址 最后的页数以 '&page=x' 追加在url后面
*
* @return string HTML内容;
*/
public static function getPageHtml($page, $pages, $url){
//最多显示多少个页码
$_pageNum = 5;
//当前页面小于1 则为1
$page = $page //当前页大于总页数 则为总页数
$page = $page > $pages ? $pages : $page;
//页数小当前页 则为当前页
$pages = $pages
//计算开始页
$_start = $page - floor($_pageNum/2);
$_start = $_start //计算结束页
$_end = $page + floor($_pageNum/2);
$_end = $_end>$pages? $pages : $_end;
//当前显示的页码个数不够最大页码数,在进行左右调整
$_curPageNum = $_end-$_start+1;
//左调整
if($_curPageNum1){
$_start = $_start - ($_pageNum-$_curPageNum);
$_start = $_start $_curPageNum = $_end-$_start+1;
}
//右边调整
if($_curPageNum $_end = $_end + ($_pageNum-$_curPageNum);
$_end = $_end>$pages? $pages : $_end;
}
$_pageHtml = '
- ';
- « ';
- « ';
- « ';
- '.$i.' ';
- '.$i.' ';
- » ';
- » ';
- » ';
/*if($_start == 1){
$_pageHtml .= '
}else{
$_pageHtml .= '
}*/
if($page>1){
$_pageHtml .= '
}
for ($i = $_start; $i if($i == $page){
$_pageHtml .= '
}else{
$_pageHtml .= '
}
}
/*if($_end == $pages){
$_pageHtml .= '
}else{
$_pageHtml .= '
}*/
if($page $_pageHtml .= '
}
$_pageHtml .= '
echo $_pageHtml;
}

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