PHP--分页类

<?php       
/*      
mysql_pager.class.php      

三个参数。 mysql_query()的结果, url变量page, 您要的每页记录数      
例子在这个文件底部      
淡水河边整理测试      
*/       

class mysql_pager {       
  // define properties       
  var $page;       
  var $result;       
  var $results_per_page = 3;       
  var $total_pages;         

/*        
Define the methods      

  下面是构造函数，和类同名（>php4）      
   需要查询的结果句柄，当前页码，每页记录数      
   like:  $f->mysql_pager($result, 1, 15);      
*/       

function mysql_pager( $result, $current_page, $results_per_page ) {       

    if(!$result){       
        echo "<div align=center>数据库未运行，结果集错误</div>
";         
        return;       
        }       

   $this->result = $result;       

   if(!$current_page || $current_page < 0)         
        $this->page = 1;       
   else $this->page = $current_page;       

   if(!emptyempty($results_per_page))         
      $this->results_per_page = $results_per_page;       

   $numrows = @mysql_num_rows($this->result);         
   if(!$numrows) {       
      echo "<div align=center>查询结果为空.</div>
";       
      return;       
      }       

   $this->total_pages = ceil($numrows / $this->results_per_page);         
}       

/*        
  下面是打印内容的函数，可以不用，也可以根据自己的需要扩展      
  这里只是打印出id      
*/       

function print_paged_results() {         
    echo "<table border=0 align=center>
";       
    $start = ($this->page - 1) * $this->results_per_page;       
    mysql_data_seek($this->result, $start);       
    $x = 0;       
    for($i = 1; $i <= $this->results_per_page && $row = @mysql_fetch_array($this->result); $i++) {       
        if($x++ & 1) $bgcolor = "#F2F2FF";       
        else $bgcolor = "#EEEEEE";       

        echo "<tr bgcolor=$bgcolor><td>". $row["id"] . "</td></tr>";             
        // 编辑这部分输出任何您想要的HTML       

        }       

       echo "</table>
";       
}       

/*        
  下面是打印页码和链接的函数      
  在我们需要显示页码的地方调用      
*/       

function print_navigation() {       
    global $PHP_SELF;       

    echo "<div align=center>";       

    for($i = 1; $i <= $this->total_pages; $i++) { #loop to print << 1 2 3... $total_pages >>         
       if($i == 1 && $this->page > 1)  #Prints the << first to goto the previous page (not on page 1)         
          echo "<a href="$PHP_SELF?page=".($this->page - 1)."" onMouseOver="status="Previous Page";return true;" onMouseOut="status=" ";return true;">?</a>";         

       if($i == $this->page)  #Doesn"t print a link itself, just prints page number        
          echo "<font color="#ff3333"> $i </font>";         

       if($i != $this->page)  #Other links that aren"t this page go here        
          echo "<a href="$PHP_SELF?page=$i" onMouseOver="status="Go to Page $i";return true;" onMouseOut="status=" ";return true;"> $i </a>";         

       if($i == $this->total_pages && $this->page != $this->total_pages)  #  Link for next page >>  (not on last page)         
          echo "<a href="$PHP_SELF?page=".($this->page + 1)."" onMouseOver="status="Go to the Next Page";return true;" onMouseOut="status=" ";return true;">?</a>";         
       }       

    echo "</div>
";         
  }       

}       

/*      
   mysql_connect($server, $uname, $pass );      
   mysql_select_db("$db");      
   $result= @mysql_query("Select * FROM table");      

   $p = new mysql_pager( $result, $page=$_GET["page"], 10 );      
   $p->print_navigation();      
   $p->print_paged_results();      
   $p->print_navigation();      
*/       
?>