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分页显示Oracle数据库记录的PHP类

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Release: 2016-06-21 08:59:42
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  <?php

/*********************************************
TOracleViewPage v 2.0
日期:2000-9-23

分页显示Oracle数据库记录的类


更新日期:2000-10-19
增加显示TopRecord的功能,允许第一页显示的记录数与其它页不同。

作者:sharetop
email:ycshowtop@21cn.com

***********************************************/
class TOracleViewPage {

var $Table; //表名
var $MaxLine; //每页显示行数

var $LinkId; //数据库连接号
var $Id; //排序参考字段

var $Offset; //记录偏移量
var $Total; //记录总数
var $Number; //本页读取的记录数
var $TopNumber;//读新记录时实际取出的记录数
var $Result; //读出的结果
var $TopResult;//读新记录时的结果

var $TheFirstPage;//特殊指定第一页的链接
var $StartRec; //指定第二页的起始记录号

var $TPages; //总页数
var $CPages; //当前页数

var $TGroup;
var $PGroup; //每页显示的页号个数
var $CGroup;

var $Condition; //显示条件 如:where id='$id' order by id desc
var $PageQuery; //分页显示要传递的参数

//-------------------------------------
// 以下构造函数、析构函数及初始化函数
//-------------------------------------

//构造函数
//参数:表名、最大行数、分页参考的字段、每页显示的页号数

function TOracleViewPage($TB,$ML,$id){
global $offset;

$this->Table=$TB;
$this->MaxLine=$ML;
$this->Id=$id;

$this->StartRec=0;
if(isset($offset)) $this->Offset=$offset;
else $this->Offset=0;

$this->Condition="";
$this->TheFirstPage=NULL;
$this->PageQury=NULL;
}

//初始化
//参数:用户名、密码、数据库
function InitDB($user,$password,$db){
if (PHP_OS == "WINNT") $dllid=dl("php3_oci80.dll");
$this->LinkId = OCILogon($user,$password,$db);
}

//断开
function Destroy(){
OCILogoff($this->LinkId);
}

//-------------------------
// Set 函数
//-------------------------

//设置显示条件
//如:where id='$id' order by id desc
//要求是字串,符合SQL语法(本字串将加在SQL语句后)

function SetCondition($s){
$this->Condition=$s;
}

//设置每组的显示个数
function SetNumGroup($pg){
$this->PGroup=$pg;
}
//设置首页,如无则为NULL
function SetFirstPage($fn){
$this->TheFirstPage=$fn;
}
//设置起始记录,如无则取默认0
function SetStartRecord($org){
$this->StartRec=$org;
}

//设置传递参数
// key参数名 value参数值
// 如:setpagequery("id",$id);如有多个参数要传递,可多次调用本函数。

function SetPageQuery($key,$value){
$tmp[key]=$key; $tmp[value]=$value;
$this->PageQuery[]=$tmp;
}

//--------------------------------
// Get 函数
//--------------------------------

//取记录总数
function GetTotalRec(){

$SQL="SELECT Count(*) AS total FROM ".$this->Table." ".$this->Condition;

$stmt = OCIParse($this->LinkId,$SQL);
$bool = OCIExecute($stmt);
if (!$bool) {
echo "连接失败!";
OCILogoff($this->LinkId);
exit;
}
else {
OCIFetch($stmt);
$this->Total=OCIResult($stmt,1);
}
OCIFreeStatement($stmt);
}

//取总页数、当前页
function GetPage(){
$this->TPages=ceil($this->Total/$this->MaxLine);
$this->CPages=ceil($this->Offset/$this->MaxLine)+1;
}

//取总组数、当前组
function GetGroup() {
$this->TGroup=ceil($this->TPages/$this->PGroup);
$this->CGroup=ceil($this->CPages/$this->PGroup);
}

//--------------------------------
// 工作函数
//--------------------------------

//读取记录
// 主要工作函数,根据所给的条件从表中读取相应的记录
// 返回值是一个二维数组,Result[记录号][字段名]

function ReadList() {

$SQL="SELECT * FROM ".$this->Table." ".$this->Condition." ORDER BY ".$this->Id." DESC";

$stmt = OCIParse($this->LinkId,$SQL);
$bool = OCIExecute($stmt);
if (!$bool) {
echo "连接失败!";
OCILogoff($this->LinkId);
exit;
}
else {
$ncols = OCINumCols($stmt);
for ( $i = 1; $i <= $ncols; $i++ )
$column_name[$i] = OCIColumnName($stmt,$i);
$k=0;

for($j=0;$j<$this->StartRec+$this->Offset;$j++) OCIFetch($stmt);
for($j=0;$j<$this->MaxLine;$j++){
if(OCIFetch($stmt)){
$k++;
for($i=1;$i<=$ncols;$i++)
$temp[$column_name[$i]]=OCIResult($stmt,$i);
$this->Result[]=$temp;
}
else break;
}
$this->Number=$k;

}
OCIFreeStatement($stmt);
return $this->Result;
}

//读最新的记录
//topnum指定要读出的记录数

function ReadTopList($topnum){

$SQL="SELECT * FROM ".$this->Table." ".$this->Condition." ORDER BY ".$this->Id." DESC";

$stmt = OCIParse($this->LinkId,$SQL);
$bool = OCIExecute($stmt);
if (!$bool) {
echo "连接失败!";
OCILogoff($this->LinkId);
exit;
}
else {
$ncols = OCINumCols($stmt);
for ( $i = 1; $i <= $ncols; $i++ )
$column_name[$i] = OCIColumnName($stmt,$i);
$k=0;

for($j=0;$j<$topnum;$j++){
if(OCIFetch($stmt)){
$k++;
for($i=1;$i<=$ncols;$i++)
$temp[$column_name[$i]]=OCIResult($stmt,$i);
$this->TopResult[]=$temp;
}
else break;
}
$this->TopNumber=$k;

}
OCIFreeStatement($stmt);
return $this->TopResult;
}

//---------------------------
// 分页相关
//---------------------------

//显示当前页及总页数
//本函数在GetPage()后调用。
function ThePage() {
echo "第".$this->CPages."页/共".$this->TPages."页";
}

//显示翻页按钮
//此函数要在GetPage()函数之后调用
//显示下页、上页,并加上要传递的参数

function Page() {
$k=count($this->PageQuery);
$strQuery=""; //生成一个要传递参数字串
for($i=0;$i<$k;$i++){
$strQuery.="&".$this->PageQuery[$i][key]."=".$this->PageQuery[$i][value];
}

return $strQuery;
}

function PrePage($strQuery){
$prev=$this->Offset-$this->MaxLine;
if($prev>=0)
echo "<A href=$PHP_SELF?offset=".$prev.$strQuery." class=newslink>上一页</A>";
else if($this->TheFirstPage!=NULL)
echo "<A href=".$this->TheFirstPage." class=newslink>上一页</A>";
else echo "上一页";
}

function NexPage($strQuery){
$next=$this->Offset+$this->MaxLine;
$k=$this->Total-$this->StartRec;
if($next<$k)
echo "<A href=$PHP_SELF?offset=".$next.$strQuery." class=newslink>下一页</A>";
else
echo "下一页";
}

//------------------------------------
// 记录分组
//----------------------------------
//显示分组
function NumPage() {
$first=($this->CGroup-1)*($this->PGroup)+1;
$last=($first+$this->PGroup > $this->TPages)? ($this->TPages+1):($first+$this->PGroup);
$pr=($this->CGroup-2>=0)?( ($this->CGroup-2)*($this->PGroup)+1 ):(-1);
$prev=($pr!=-1)?( ($pr-1)*$this->MaxLine):(0);
$ne=($this->CGroup*$this->PGroup+1<=$this->TPages)?($this->CGroup*$this->PGroup+1):(-1);
$next=($ne!=-1)?( ($ne-1)*$this->MaxLine):(0);

$k=count($this->PageQuery);
$strQuery=""; //生成一个要传递参数字串
for($i=0;$i<$k;$i++){
$strQuery.="&".$this->PageQuery[$i][key]."=".$this->PageQuery[$i][value];
}

if($first!=1)
echo "<A href=$PHP_SELF?offset=".$prev.$strQuery." > << </a>";
for($i=$first;$i<$last;$i++) {
if($this->CPages!=$i){
$current=($i-1)*$this->MaxLine;
echo "<A href=$PHP_SELF?offset=".$current.$strQuery." >".$i."</a> ";
}
else echo "<font color=#e00729>".$i."</font> ";
}
if($ne!=-1)
echo "<A href=$PHP_SELF?offset=".$next.$strQuery." > >> </a>";
}

//******end class
}
?>



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