本文實(shí)例講述了CI框架簡單分頁類用法。分享給大家供大家參考，具體如下：
/**
*
* 關(guān)于 頁碼有效性的判斷需要加在 控制器中判斷，即當(dāng)頁碼數(shù)1或者>總頁數(shù)
*
*/
class Custom_pagination
{
var $page_url = ''; //分頁目標(biāo)URL
var $page_size = 10; //每一頁行數(shù)
var $page_num = 1;//頁碼
var $rows_num= '';//數(shù)據(jù)總行數(shù)
var $links_num= 3;//選中鏈接前后的鏈接數(shù)，必須大于等于1
var $anchor_class= '';//鏈接樣式類
var $current_class= '';//當(dāng)前頁樣式類
var $full_tag_open= '';//分頁開始標(biāo)簽
var $full_tag_close= '';//分頁結(jié)束標(biāo)簽
var $info_tag_open= '';
var $info_tag_close= ' ';
var $first_tag_open= '';
var $first_tag_close= ' ';
var $last_tag_open= ' ';
var $last_tag_close= '';
var $cur_tag_open= ' strong>';
var $cur_tag_close= '/strong>';
var $next_tag_open= ' ';
var $next_tag_close= ' ';
var $prev_tag_open= ' ';
var $prev_tag_close= '';
var $num_tag_open= ' ';
var $num_tag_close= '';
public function __construct($params = array())
{
if (count($params) > 0)
{
$this->init($params);
}
}
function init($params = array()) //初始化數(shù)據(jù)
{
if (count($params) > 0)
{
foreach ($params as $key => $val)
{
if (isset($this->$key))
{
$this->$key = $val;
}
}
}
}
function create_links()
{
///////////////////////////////////////////////////////
//準(zhǔn)備數(shù)據(jù)
///////////////////////////////////////////////////////
$page_url = $this->page_url;
$rows_num = $this->rows_num;
$page_size = $this->page_size;
$links_num = $this->links_num;
if ($rows_num == 0 OR $page_size == 0)
{
return '';
}
$pages = intval($rows_num/$page_size);
if ($rows_num % $page_size)
{
//有余數(shù)pages+1
$pages++;
};
$page_num = $this->page_num 1 ? '1' : $this->page_num;
$anchor_class = '';
if($this->anchor_class !== '')
{
$anchor_class = 'class="'.$this->anchor_class.'" ';
}
$current_class = '';
if($this->current_class !== '')
{
$current_class = 'class="'.$this->current_class.'" ';
}
if($pages == 1)
{
return '';
}
if($links_num 0)
{
return '- -！links_num必須大于等于0';
}
////////////////////////////////////////////////////////
//創(chuàng)建鏈接開始
////////////////////////////////////////////////////////
$output = $this->full_tag_open;
$output .= $this->info_tag_open.'共'.$rows_num.'條數(shù)據(jù) 第 '.$page_num.'/'.$pages.' 頁'.$this->info_tag_close;
//首頁
if($page_num > 1)
{
$output .= $this->first_tag_open.'a '.$anchor_class.' href="'.site_url($page_url).'" rel="external nofollow" >首頁/a>'.$this->first_tag_close;
}
//上一頁
if($page_num > 1)
{
$n = $page_num - 1;
$output .= $this->prev_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >上一頁/a>'.$this->prev_tag_close;
}
//pages
for($i=1;$i=$pages;$i++)
{
$pl = $page_num - $links_num 0 ? 0 : $page_num - $links_num;
$pr = $page_num + $links_num > $pages ? $pages : $page_num + $links_num;
//判斷鏈接個數(shù)是否太少，舉例，假設(shè)links_num = 2，則鏈接個數(shù)不可少于 5 個，主要是 當(dāng)page_num 等于 1， 2 和 n，n-1的時候
if($pr 2 * $links_num + 1)
{
$pr = 2 * $links_num + 1;
}
if($pl > $pages-2 * $links_num)
{
$pl = $pages - 2 * $links_num;
}
if($i == $page_num)
{ //current page
$output .= $this->cur_tag_open.'span '.$current_class.' >'.$i.'/span>'.$this->cur_tag_close;
}else if($i >= $pl $i = $pr)
{
$output .= $this->num_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$i).'" rel="external nofollow" >'.$i.'/a>'.$this->num_tag_close;
}
}
//下一頁
if($page_num $pages)
{
$n = $page_num + 1;
$output .= $this->next_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$n).'" rel="external nofollow" rel="external nofollow" >下一頁/a>'.$this->next_tag_close;
}
//末頁
if($page_num $pages)
{
$output .= $this->last_tag_open.'a '.$anchor_class.' href="'.site_url($page_url.'/'.$pages).'" rel="external nofollow" >末頁/a>'.$this->last_tag_close;
}
$output.=$this->full_tag_close;
return $output;
}
}
控制器里調(diào)用
$config['page_url']
= 'about/science';
$config['page_size'] = $pagesize;
$config['rows_num'] = $num_rows;
$config['page_num'] = $page;
$this->load->library('Custom_pagination');
$this->custom_pagination->init($config);
echo $this->custom_pagination->create_links();
?php
class page{
public $page; //當(dāng)前頁
public $pagenum; // 頁數(shù)
public $pagesize; // 每頁顯示條數(shù)
public function __construct($count, $pagesize){
$this->pagenum = ceil($count/$pagesize);
$this->pagesize = $pagesize;
$this->page =(isset($_GET['p'])$_GET['p']>0) ? intval($_GET['p']) : 1;
}
/**
* 獲得 url 后面GET傳遞的參數(shù)
*/
public function getUrl(){
$url = 'index.php?'.http_build_query($_GET);
$url = preg_replace('/[?,]p=(\w)+/','',$url);
$url .= (strpos($url,"?") === false) ? '?' : '';
return $url;
}
/**
* 獲得分頁HTML
*/
public function getPage(){
$url = $this->getUrl();
$start = $this->page-5;
$start=$start>0 ? $start : 1;
$end = $start+9;
$end = $end$this->pagenum ? $end : $this->pagenum;
$pagestr = '';
if($this->page>5){
$pagestr = "a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=1".">首頁/a> ";
}
if($this->page!=1){
$pagestr.= "a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->page-1).">上一頁/a>";
}
for($i=$start;$i=$end;$i++){
$pagestr.= "a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$i.">".$i."/a> ";
}
if($this->page!=$this->pagenum){
$pagestr.="a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".($this->page+1).">下一頁/a>";
}
if($this->page+5$this->pagenum){
$pagestr.="a href=".$url." rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" p=".$this->pagenum.">尾頁/a> ";
}
return $pagestr;
}
}
// 測試代碼
$page = new page(100,10);
$str=$page->getPage();
echo $str;
?>
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希望本文所述對大家基于CodeIgniter框架的PHP程序設(shè)計有所幫助。
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