php和mysql分頁顯示詳解

1.數據庫連接的類dbClass.inc。
<?php
/**
* a class use to connect the MySQL database and do some query
*/
class dbClass {
private $hostName = "localhost:3306";
private $dbName = "ebooklib";
private $Login = "root";
private $Password = "";
private $conn;
private $result;

function dbClass(){
$this->conn = mysql_connect("$this->hostName","$this->Login","$this->Password");
mysql_select_db("$this->dbName", $this->conn);
}

function executeQuery($sql){
$this->result = mysql_query("$sql",$this->conn);
return $this->result;
}

function closeConn(){
mysql_close($this->conn);
}
}

?>

2.解決分頁問題的PageQuery.inc
<?php
include("dbClass.inc");
class PageQuery extends dbClass {
    private $Offset;             // 記錄偏移量
    private $Total;             // 記錄總數
     
    private $maxLine;             // 記錄每頁顯示記錄數
    private $result;             // 讀出的結果
   
    private $TPages;             // 總頁數
    private $CPages;             // 當前頁數
   
    private $PageQuery;         // 分頁顯示要傳遞的參數
    private $Query;             // query 語句
    private $QueryPart;         // " FROM " 以后的 query 部分
    private $QueryString;         // ? 以后部分 
     
    private $FilePath;
           
    // 每頁顯示行數
    function PageQuery($pageLine=10) {   
        $this->dbClass();
        $this->maxLine = $pageLine;
      }
     
      // 記錄總數
    function getTotal(){
        return $this->Total;
    }
     
      // 顯示總頁數
    function getTotalPages() {
        return $this->TPages;
    }

    //顯示當前所在頁數
    function getCurrenPages() {         
        return $this->CPages;
    }
   
    function myQuery($sql, $flag=1){
            GLOBAL $offset;
            $this->Query = $sql;
       
        // 獲取文件名
        //$this->FilePath = $GLOBALS["REQUEST_URI"];
            $this->FilePath = $GLOBALS["SCRIPT_NAME"];
           
            // 獲取查詢條件
            $this->QueryString = $GLOBALS["QUERY_STRING"];           
            //echo $this->QueryString . "<br>";           
           
            // 截取 " from " 以后的 query 語句
            $this->QueryPart = trim(strstr($sql, " from "));
           
            // 計算偏移量
            if (!isset($offset)) $this->Offset = 0;
            else $this->Offset = (int)$offset;
           
           
       
       
        // 計算總的記錄條數
        $SQL = "SELECT Count(*) AS total " . $this->QueryPart;
        $this->result = $this->executeQuery($SQL);
            $this->Total = mysql_result($this->result,0);
           
            // 設置當前頁數和總頁數
        $this->TPages = (double)Ceil((double)$this->Total/$this->maxLine);
        $this->CPages = (double)Floor((double)$this->Offset/$this->maxLine+1);
       
       
        // 根據條件判斷，取出所需記錄
        if ($this->Total > 0) {
            //flag等于1表示要分頁，否則不分頁
            if($flag==1)
                $SQL = $this->Query . " LIMIT " . $this->Offset . " , " . $this->maxLine;
            else
                $SQL = $this->Query;           
            echo $SQL . "<br>";
            $this->result = $this->executeQuery($SQL);
        }
        return $this->result;
    }
   
    //**********顯示翻頁提示欄************* 
    // 顯示首頁、下頁、上頁、尾頁
    function PageLegend() {       
     $str = "";
        $i = 0;
        $first = 0;
        $next = 0;
        $prev = 0;
        $last = 0;
   
            $next = $this->Offset + $this->maxLine;
            $prev = $this->Offset - $this->maxLine;
            $last = ($this->TPages - 1) * $this->maxLine;
           
            GLOBAL $offset;
            if (!isset($offset)) $this->QueryString .= "&offset=";
            else{
                $this->QueryString = substr($this->QueryString,0,strrpos($this->QueryString,'&')) . "&offset=";
            }
           
            if($this->Offset >= $this->maxLine)
            $str .=  " <A href=" . $this->FilePath . "?" . $this->QueryString . $first . ">首頁</A> ";
            else $str .= " 首頁 ";
       
        if($prev >= 0)
            $str .=  " <A href=" . $this->FilePath . "?" . $this->QueryString . $prev . ">上一頁</A> ";
        else $str .= " 上一頁 ";
       
        if($next < $this->Total)
            $str .=  " <A href=" . $this->FilePath . "?" . $this->QueryString . $next . ">下一頁</A> ";
        else $str .= " 下一頁 ";
       
        if($this->TPages != 0 && $this->CPages < $this->TPages)
            $str .=  " <A href=" . $this->FilePath . "?" . $this->QueryString . $last . ">尾頁</A>";
        else $str .= " 尾頁 ";

        $str .= " 頁次：" . $this->getCurrenPages() . "/" . $this->getTotalPages() . "頁 ";
        $str .= $this->maxLine . "條/頁 " . "共" . $this->Total . "條";
            return $str;
    }
}
?>
3.用于顯示結果的mysql_result_all.inc
<?
function mysql_result_all($result,$format="") {
echo "<table $format><tr>";
for($i=0;$i<mysql_num_fields($result);$i++) {
echo "<th>".mysql_field_name($result,$i)."</th>";
}
echo "</tr>";
while($row = mysql_fetch_array($result) ) {
for($i=0;$i<mysql_num_fields($result);$i++) {
echo "<td>".$row[$i]."</td>";
}
echo "</tr>";
}
echo "</table>";
}
?>
4.顯示頁面的代碼：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>php＆mysql分頁顯示</title>
</head>

posted on 2005-09-01 17:21 扭轉乾坤 閱讀(312) 評論(0)  編輯  收藏 所屬分類: JAVA使用技巧