Php 分页类

[代码] 分页类主体

<?php
/**
* 分页类
* @author  xiaojiong & 290747680@qq.com
* @date 2011-08-17
*
* show(2)  1 ... 62 63 64 65 66 67 68 ... 150
* 分页样式
* #page{font:12px/16px arial}
* #page span{float:left;margin:0px 3px;}
* #page a{float:left;margin:0 3px;border:1px solid #ddd;padding:3px 7px; text-decoration:none;color:#666}
* #page a.now_page,#page a:hover{color:#fff;background:#05c}
*/

class page
{
public     $first_row; 		  //起始行数

public     $list_rows;  	  //列表每页显示行数

protected  $total_pages;	  //总页数

protected  $total_rows;		  //总行数

protected  $now_page;         //当前页数

protected  $is_ajax  = FALSE; //是否ajax

protected  $parameter = '';

protected  $page_name;        //分页参数的名称

protected  $ajax_func_name;

public 	   $plus = 3;         //分页偏移量

protected  $url;

/**
* 构造函数
* @param unknown_type $data
*/
public function __construct($data = array())
{
$this->total_rows = $data['total_rows'];

$this->parameter  = !empty($data['parameter']) ? $data['parameter'] : '';
$this->list_rows  = !empty($data['list_rows']) && $data['list_rows'] <= 100 ? $data['list_rows'] : 15;
$this->total_pages= ceil($this->total_rows / $this->list_rows);
$this->page_name  = !empty($data['page_name']) ? $data['page_name'] : 'p';

/* 当前页面 */
if(!empty($data['now_page']))
{
$this->now_page = intval($data['now_page']);
}else{
$this->now_page   = !empty($_GET[$this->page_name]) ? intval($_GET[$this->page_name]):1;
}
$this->now_page   = $this->now_page <= 0 ? 1 : $this->now_page;

if(!empty($data['is_ajax']))
{
$this->is_ajax = TRUE;
$this->ajax_func_name = $data['ajax_func_name'];
}

if(!empty($this->total_pages) && $this->now_page > $this->total_pages)
{
$this->now_page = $this->total_pages;
}
$this->first_row = $this->list_rows * ($this->now_page - 1);
}

/**
* 得到当前连接
* @param $page
* @param $text
* @return string
*/
protected function _get_link($page,$text)
{
if($this->is_ajax)
{
$parameter = '';
if($this->parameter)
{
$parameter = ','.$this->parameter;
}
return '<a onclick="' . $this->ajax_func_name . '(\'' . $page . '\''.$parameter.')" href="javascript:void(0)">' . $text . '</a>' . "\n";
}
else
{
return '<a href="' . $this->_get_url($page) . '">' . $text . '</a>' . "\n";
}
}

/**
* 设置当前页面链接
*/
protected function _set_url()
{
$url  =  $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'?')?'':"?").$this->parameter;
$parse = parse_url($url);
if(isset($parse['query'])) {
parse_str($parse['query'],$params);
unset($params[$this->page_name]);
$url   =  $parse['path'].'?'.http_build_query($params);
}
if(!empty($params))
{
$url .= '&';
}
$this->url = $url;
}

/**
* 得到$page的url
* @param $page 页面
* @return string
*/
protected function _get_url($page)
{
if($this->url === NULL)
{
$this->_set_url();
}
//	$lable = strpos('&', $this->url) === FALSE ? '' : '&';
return $this->url . $this->page_name . '=' . $page;
}

/**
* 得到第一页
* @return string
*/
public function first_page($name = '第一页')
{
if($this->now_page > 5)
{
return $this->_get_link('1', $name);
}
return '';
}

/**
* 最后一页
* @param $name
* @return string
*/
public function last_page($name = '最后一页')
{
if($this->now_page < $this->total_pages - 5)
{
return $this->_get_link($this->total_pages, $name);
}
return '';
}

/**
* 上一页
* @return string
*/
public function up_page($name = '上一页')
{
if($this->now_page != 1)
{
return $this->_get_link($this->now_page - 1, $name);
}
return '';
}

/**
* 下一页
* @return string
*/
public function down_page($name = '下一页')
{
if($this->now_page < $this->total_pages)
{
return $this->_get_link($this->now_page + 1, $name);
}
return '';
}

/**
* 分页样式输出
* @param $param
* @return string
*/
public function show($param = 1)
{
if($this->total_rows < 1)
{
return '';
}
switch ($param) {
case '1' :
return $this->show_1();
break;
case '2' :
return $this->show_2();
break;
case '3' :
$this->ajax_func_name  = empty($this->ajax_func_name) ? 'toPage' : $this->ajax_func_name;
return $this->show_3();
break;
}
}

protected function show_2()
{
if($this->total_pages != 1)
{
$return = '';
$return .= $this->up_page('<');
for($i = 1;$i<=$this->total_pages;$i++)
{
if($i == $this->now_page)
{
$return .= "<a class='now_page'>$i</a>\n";
}
else
{
if($this->now_page-$i>=4 && $i != 1)
{
$return .="<span class='pageMore'>...</span>\n";
$i = $this->now_page-3;
}
else
{
if($i >= $this->now_page+5 && $i != $this->total_pages)
{
$return .="<span>...</span>\n";
$i = $this->total_pages;
}
$return .= $this->_get_link($i, $i) . "\n";
}
}
}
$return .= $this->down_page('>');
return $return;
}
}

protected function show_1()
{
$plus = $this->plus;
if( $plus + $this->now_page > $this->total_pages)
{
$begin = $this->total_pages - $plus * 2;
}else{
$begin = $this->now_page - $plus;
}

$begin = ($begin >= 1) ? $begin : 1;
$return = '';
$return .= $this->first_page();
$return .= $this->up_page();
for ($i = $begin; $i <= $begin + $plus * 2;$i++)
{
if($i>$this->total_pages)
{
break;
}
if($i == $this->now_page)
{
$return .= "<a class='now_page'>$i</a>\n";
}
else
{
$return .= $this->_get_link($i, $i) . "\n";
}
}
$return .= $this->down_page();
$return .= $this->last_page();
return $return;
}

protected function show_3()
{
$plus = $this->plus;
if( $plus + $this->now_page > $this->total_pages)
{
$begin = $this->total_pages - $plus * 2;
}else{
$begin = $this->now_page - $plus;
}
$begin = ($begin >= 1) ? $begin : 1;
$return = '总计 ' .$this->total_rows. ' 个记录分为 ' .$this->total_pages. ' 页, 当前第 ' . $this->now_page . ' 页 ';
$return .= ',每页 ';
$return .= '<input type="text" value="'.$this->list_rows.'" id="pageSize" size="3"> ';
$return .= $this->first_page()."\n";
$return .= $this->up_page()."\n";
$return .= $this->down_page()."\n";
$return .= $this->last_page()."\n";
$return .= '<select onchange="'.$this->ajax_func_name.'(this.value)" id="gotoPage">';

for ($i = $begin;$i<=$begin+10;$i++)
{
if($i>$this->total_pages)
{
break;
}
if($i == $this->now_page)
{
$return .= '<option selected="true" value="'.$i.'">'.$i.'</option>';
}
else
{
$return .= '<option value="' .$i. '">' .$i. '</option>';
}
}
$return .= '</select>';
return $return;
}
}

[代码] 使用方法

<?php
include 'page.php';

$options = array(
'total_rows' => '100', //总行数
'list_rows'  => '15',  //每页显示量
);

/* 实例化 */
$page = new page($options);

//然后 在sql语句里面 limit $page->first_row , $page->list_rows

echo $page->show(1); //ok  打印第一样式

//支持ajax 方法自己探索好了，不想写了~