PHP分页类1

page.php

/**
 * 分页类
 * 使用方式:
 * $page = new Page();
 * $page->init(1000, 20);
 * $page->setNotActiveTemplate('<span> {a} </span>');
 * $page->setActiveTemplate('{a}');
 * echo $page->show();
 * 
 * 
 * @author 风居住的地方
 */
class Page {
  /**
   * 总条数
   */
  private $total;
  /**
   * 每页大小
   */
  private $pageSize;
  /**
   * 总页数
   */
  private $pageNum;
  /**
   * 当前页
   */
  private $page;
  /**
   * 地址
   */
  private $uri;
  /**
   * 分页变量
   */
  private $pageParam;
  /**
   * LIMIT XX,XX
   */
  private $limit;
  /**
   * 数字分页显示
   */
  private $listnum = 8;
  /**
   * 分页显示模板
   * 可用变量参数
   * {total}   总数据条数
   * {pagesize}  每页显示条数
   * {start}   本页开始条数
   * {end}    本页结束条数
   * {pagenum}  共有多少页
   * {frist}   首页
   * {pre}    上一页
   * {next}    下一页
   * {last}    尾页
   * {list}    数字分页
   * {goto}    跳转按钮
   */
  private $template = '<div><span>共有{total}条数据</span><span>每页显示{pagesize}条数据</span>,<span>本页{start}-{end}条数据</span><span>共有{pagenum}页</span><ul>{frist}{pre}{list}{next}{last}{goto}</ul></div>';
  /**
   * 当前选中的分页链接模板
   */
  private $activeTemplate = '<li class="active"><a href="javascript:;">{text}</a></li>';
  /**
   * 未选中的分页链接模板
   */
  private $notActiveTemplate = '<li><a href="{url}">{text}</a></li>';
  /**
   * 显示文本设置
   */
  private $config = array('frist' => '首页', 'pre' => '上一页', 'next' => '下一页', 'last' => '尾页');
  /**
   * 初始化
   * @param type $total    总条数
   * @param type $pageSize  每页大小
   * @param type $param    url附加参数
   * @param type $pageParam  分页变量
   */
  public function init($total, $pageSize, $param = '', $pageParam = 'page') {
    $this->total = intval($total);
    $this->pageSize = intval($pageSize);
    $this->pageParam = $pageParam;
    $this->uri = $this->geturi($param);
    $this->pageNum = ceil($this->total / $this->pageSize);
    $this->page = $this->setPage();
    $this->limit = $this->setlimit();
  }
   
  /**
   * 设置分页模板
   * @param type $template  模板配置
   */
  public function setTemplate($template) {
    $this->template = $template;
  }
   
  /**
   * 设置选中分页模板
   * @param type $activeTemplate   模板配置
   */
  public function setActiveTemplate($activeTemplate) {
    $this->activeTemplate = $activeTemplate;
  }
 
  /**
   * 设置未选中分页模板
   * @param type $notActiveTemplate  模板配置
   */
  public function setNotActiveTemplate($notActiveTemplate) {
    $this->notActiveTemplate = $notActiveTemplate;
  }
 
  /**
   * 返回分页
   * @return type
   */
  public function show() {
    return str_ireplace(array(
      '{total}',
      '{pagesize}',
      '{start}',
      '{end}',
      '{pagenum}',
      '{frist}',
      '{pre}',
      '{next}',
      '{last}',
      '{list}',
      '{goto}',
    ), array(
      $this->total,
      $this->setPageSize(),
      $this->star(),
      $this->end(),
      $this->pageNum,
      $this->frist(),
      $this->prev(),
      $this->next(),
      $this->last(),
      $this->pagelist(),
      $this->gopage(),
    ), $this->template);
  }
   
  /**
   * 获取limit起始数
   * @return type
   */
  public function getOffset() {
    return ($this->page - 1) * $this->pageSize;
  }
   
  /**
   * 设置LIMIT
   * @return type
   */
  private function setlimit() {
    return "limit " . ($this->page - 1) * $this->pageSize . ",{$this->pageSize}";
  }
 
  /**
   * 获取limit
   * @param type $args
   * @return type
   */
  public function __get($args) {
    if ($args == "limit") {
      return $this->limit;
    } else {
      return null;
    }
  }
 
  /**
   * 初始化当前页
   * @return int
   */
  private function setPage() {
    if (!empty($_GET[$this->pageParam])) {
      if ($_GET[$this->pageParam] > 0) {
        if ($_GET[$this->pageParam] > $this->pageNum)
          return $this->pageNum;
        else
          return $_GET[$this->pageParam];
      }
    }
    return 1;
  }
 
  /**
   * 初始化url
   * @param type $param
   * @return string
   */
  private function geturi($param) {
    $url = $_SERVER['REQUEST_URI'] . (strpos($_SERVER['REQUEST_URI'], "?") ? "" : "?") . $param;
    $parse = parse_url($url);
    if (isset($parse["query"])) {
      parse_str($parse["query"], $params);
      unset($params["page"]);
      $url = $parse["path"] . "?" . http_build_query($params);
      return $url;
    } else {
      return $url;
    }
  }
 
  /**
   * 本页开始条数
   * @return int
   */
  private function star() {
    if ($this->total == 0) {
      return 0;
    } else {
      return ($this->page - 1) * $this->pageSize + 1;
    }
  }
 
  /**
   * 本页结束条数
   * @return type
   */
  private function end() {
    return min($this->page * $this->pageSize, $this->total);
  }
 
  /**
   * 设置当前页大小
   * @return type
   */
  private function setPageSize() {
    return $this->end() - $this->star() + 1;
  }
   
  /**
   * 首页
   * @return type
   */
  private function frist() {
    $html = '';
    if ($this->page == 1) {
      $html .= $this->replace("{$this->uri}&page=1", $this->config['frist'], true);
    } else {
      $html .= $this->replace("{$this->uri}&page=1", $this->config['frist'], false);
    }
    return $html;
  }
 
  /**
   * 上一页
   * @return type
   */
  private function prev() {
    $html = '';
    if ($this->page > 1) {
      $html .= $this->replace($this->uri.'&page='.($this->page - 1), $this->config['pre'], false);
    } else {
      $html .= $this->replace($this->uri.'&page='.($this->page - 1), $this->config['pre'], true);
    }
    return $html;
  }
 
  /**
   * 分页数字列表
   * @return type
   */
  private function pagelist() {
    $linkpage = "";
    $lastlist = floor($this->listnum / 2);
    for ($i = $lastlist; $i >= 1; $i--) {
      $page = $this->page - $i;
      if ($page >= 1) {
        $linkpage .= $this->replace("{$this->uri}&page={$page}", $page, false);
      } else {
        continue;
      }
    }
    $linkpage .= $this->replace("{$this->uri}&page={$this->page}", $this->page, true);
    for ($i = 1; $i <= $lastlist; $i++) {
      $page = $this->page + $i;
      if ($page <= $this->pageNum) {
        $linkpage .= $this->replace("{$this->uri}&page={$page}", $page, false);
      } else {
        break;
      }
    }
    return $linkpage;
  }
 
  /**
   * 下一页
   * @return type
   */
  private function next() {
    $html = '';
    if ($this->page < $this->pageNum) {
      $html .= $this->replace($this->uri.'&page='.($this->page + 1), $this->config['next'], false);
    } else {
      $html .= $this->replace($this->uri.'&page='.($this->page + 1), $this->config['next'], true);
    }
    return $html;
  }
 
  /**
   * 最后一页
   * @return type
   */
  private function last() {
    $html = '';
    if ($this->page == $this->pageNum) {
      $html .= $this->replace($this->uri.'&page='.($this->pageNum), $this->config['last'], true);
    } else {
      $html .= $this->replace($this->uri.'&page='.($this->pageNum), $this->config['last'], false);
    }
    return $html;
  }
 
  /**
   * 跳转按钮
   * @return string
   */
  private function gopage() {
    $html = '';
    $html.=' <input type="text" value="' . $this->page . '" onkeydown="javascript:if(event.keyCode==13){var page=(this.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.value;location=\'' . $this->uri . '&page=\'+page+\'\'}" style="width:25px;"/><input type="button" onclick="javascript:var page=(this.previousSibling.value>' . $this->pageNum . ')?' . $this->pageNum . ':this.previousSibling.value;location=\'' . $this->uri . '&page=\'+page+\'\'" value="GO"/>';
    return $html;
  }
 
  /**
   * 模板替换
   * @param type $replace   替换内容
   * @param type $result   条件
   * @return type
   */
  private function replace($url, $text, $result = true) {
    $template = ($result ? $this->activeTemplate : $this->notActiveTemplate);
     
     $html = str_replace('{url}', $url, $template);
     $html = str_replace('{text}', $text, $html);
    return $html;
  }
}