通用分页类（以Codeigniter测试）
page_list.php
复制代码 代码如下:
<?php if( ! defined('BASEPATH')) die('No Access');
/**
* 分页类
*/
class Page_list {
/**
* 总数据
* @var int
*/
private $total;
/**
* 每页显示数据
* @var int
*/
private $size;
/**
* 当前页数
* @var int
*/
private $page;
/**
* 页数列表左右页数
* @var int
*/
private $len;
/**
* 总页数
* @var int
*/
private $page_total;
/**
* 页码列表
* @var array
*/
private $page_list;
/**
* 基准地址
* @var string
*/
private $base_url;
/**
* 替换标志
* @var string
*/
private $place;
/**
* 分页样式
* @var string
*/
private $style;
/**
* 构造函数
*
* @param array $config 配置数组
*/
public function __construct($config = array()){
// 初始化默认值
$this->total = 0;
$this->size = 20;
$this->page = 1;
$this->len = 4;
$this->page_total = 1;
$this->page_list = array();
$this->base_url = '?page=-page-';
$this->place = '-page-';
$this->style = $this->get_default_style();
$this->initialize($config);
}
/**
* 初始化分页
*
* @param array $config 配置数组
*/
public function initialize($config = array()){
// 取得配置值
if(is_array($config)){
if(array_key_exists('total', $config)) $this->total = @intval($config['total']);
if(array_key_exists('size', $config)) $this->size = @intval($config['size']);
if(array_key_exists('page', $config)) $this->page = @intval($config['page']);
if(array_key_exists('len', $config)) $this->len = @intval($config['len']);
if(array_key_exists('base_url', $config)) $this->base_url = @strval($config['base_url']);
if(array_key_exists('place', $config)) $this->place = @strval($config['place']);
if(array_key_exists('style', $config)) $this->style = @strval($config['style']);
}
// 修正值
if($this->total<0) $this->total = 0;
if($this->size<=0) $this->size = 20;
if($this->page<=0) $this->page = 1;
if($this->len<=0) $this->len = 4;
// 执行分页算法
$this->page_total = ceil($this->total/$this->size);
if($this->page_total<=0) $this->page_total = 1;
if($this->page>$this->page_total) $this->page = $this->page_total;
if($this->page-$this->len>=1){
for($i=$this->len; $i>0; $i--){
$this->page_list[] = $this->page - $i;
}
}else{
for($i=1; $i<$this->page; $i++){
$this->page_list[] = $i;
}
}
$this->page_list[] = $this->page;
if($this->page+$this->len<=$this->page_total){
for($i=1; $i<=$this->len; $i++){
$this->page_list[] = $this->page + $i;
}
}else{
for($i=$this->page+1; $i<=$this->page_total; $i++){
$this->page_list[] = $i;
}
}
}