<?PHP
/**********************************************************************************
此類(lèi)將數(shù)據(jù)庫(kù)操作封裝，具有良好的可移植性,針對(duì)數(shù)據(jù)庫(kù)：mysql,mssql,pg
************************************************************************************
// -函數(shù)清單 索引：
// - Open: 打開(kāi)數(shù)據(jù)庫(kù)連接 Line:71
// - Close: 關(guān)閉數(shù)據(jù)庫(kù)連接 Line:107
// - SelectDB: 選擇數(shù)據(jù)庫(kù) Line:129
// - Query: 創(chuàng)建查詢(xún) Line:151
// - DataSeek: 移動(dòng)記錄指針 Line:175
// - FieldName: 獲取字段名稱(chēng) Line:198
// - FieldType: 獲取字段類(lèi)型 Line:220
// - FieldLenght: 獲取字段長(zhǎng)度 Line:242
// - FetchRow: 獲取數(shù)據(jù)并保存到數(shù)組（數(shù)字索引） Line:264
// - FetchArray: 獲取數(shù)據(jù)并保存進(jìn)數(shù)組（數(shù)字和關(guān)聯(lián)） Line:289
// - FetchObject: 獲取數(shù)據(jù)并保存到對(duì)象（對(duì)象方式） Line:315
// - Result: 獲取結(jié)果數(shù)據(jù) Line:341
// - FreeResult: 刷新記錄集 Line:363
// - RowsNumber: 獲取記錄數(shù)量 Line:385
// - FieldsNumber: 獲取字段數(shù)量 Line:407
// - CurRecNumber: 獲取當(dāng)前記錄號(hào)（從0開(kāi)始） Line:429
// - RecordNumber: 獲取當(dāng)前行號(hào)（從1開(kāi)始） Line:438
// - MoveFirstRec: 移動(dòng)到第一條記錄 Line:447
// - MoveLastRec: 移動(dòng)到最后一條記錄 Line:469
// - MovePreviousRec: 移動(dòng)到前一條記錄 Line:495
// - MoveNextRec: 移動(dòng)到下一條記錄 Line:521
// - MoveToRec: 移動(dòng)到一個(gè)特定的記錄（從1開(kāi)始） Line:548
************************************************************************************
//Inputs:
// - dbType: databases type: mssql, mysql, pg
// - connectType: connection type: c - common connection,
// p - open persistent connection
// - connect: for MS SQL Server - server name,
// for MySQL - hostname [:port] [:/path/to/socket] ,
// for PostgreSQL - host, port, tty, options,
// dbname (without username and password)
// - username
// - password
// - dbName: database name
// - query: SQL query
// - result: result set identifier
// - RowNumber:
// - offset: field identifier
// - ResultType: a constant and can take the following values: PGSQL_ASSOC, PGSQL_NUM, and PGSQL_BOTH
// - FieldName
//
//Returns:
// - result: result set identifier
// - connect link identifier
// - record number (starting at 0: CurrRecNumber or starting at 1: RecordNumber)
// - number of fields in the specified result set
// - number of rows in the specified result set
*************************************************************************************/
Class mDatabase
{
/***********************************成員變量定義***************************************/
var $dbType; // 數(shù)據(jù)庫(kù)類(lèi)型: mssql, mysql, pg
var $connectType; // 連接類(lèi)型: c - common connection, p - open persistent connection
var $idCon; // 連接號(hào)
var $curRow; // current row number of data from the result
// associated with the specified result identifier array
var $seek; // current row number of data from DataSeek function array
 
/***********************************成員方法實(shí)現(xiàn)***************************************/
/************************************************************************************
*連接數(shù)據(jù)庫(kù)的函數(shù)
*************************************************************************************/
Function Open($dbType, $c, $connect, $username = "", $password = "")
{
$this->dbType = $dbType;
Switch ($dbType) {
Case "mssql":
If ($connectType == "c") {
$idCon = mssql_connect($connect, $username, $password);
} Else {
$idCon = mssql_pconnect($connect, $username, $password);
}
Break;
Case "mysql":
If ($connectType == "c") {
$idCon = mysql_connect($connect, $username, $password);
} Else {
$idCon = mysql_pconnect($connect, $username, $password);
}
Break;
Case "pg":
If ($connectType == "c") {
$idCon = pg_connect($connect . " user=" . $username . " password=" . $password);
} Else {
$idCon = pg_pconnect($connect . " user=" . $username . " password=" . $password);
}
Break;
Default:
$idCon = 0;
Break;
}
$this->idCon = $idCon;
Return $idCon;
}
/************************************************************************************
*關(guān)閉數(shù)據(jù)庫(kù)連接
*************************************************************************************/
Function Close()
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_close($this->idCon);
Break;
Case "mysql":
$r = mysql_close($this->idCon);
Break;
Case "pg":
$r = pg_close($this->idCon);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*選擇數(shù)據(jù)庫(kù)
*************************************************************************************/
Function SelectDb($dbName)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_select_db($dbName);
Break;
Case "mysql":
$r = mysql_select_db($dbName);
Break;
Case "pg":
$r = False;
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*創(chuàng)建查詢(xún)
*************************************************************************************/
Function Query($query)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_query($query, $this->idCon);
Break;
Case "mysql":
$r = mysql_query($query, $this->idCon);
Break;
Case "pg":
$r = pg_exec($this->idCon, $query);
Break;
Default:
$r = False;
Break;
}
$this->curRow[$r] = 0;
$this->seek[$r] = 0;
Return $r;
}
/************************************************************************************
*移動(dòng)記錄指針
*************************************************************************************/
Function DataSeek($result, $RowNumber)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_data_seek($result, $RowNumber);
Break;
Case "mysql":
$r = mysql_data_seek($result, $RowNumber);
Break;
Case "pg":
$r = False;
Break;
Default:
$r = False;
Break;
}
$this->seek[$result] = (int) $RowNumber;
Return $r;
}
/************************************************************************************
*獲取字段名
*************************************************************************************/
Function FieldName($result, $offset)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_field_name($result, $offset);
Break;
Case "mysql":
$r = mysql_field_name($result, $offset);
Break;
Case "pg":
$r = pg_fieldname($result, $offset);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取字段類(lèi)型
*************************************************************************************/
Function FieldType($result, $offset)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_field_type($result, $offset);
Break;
Case "mysql":
$r = mysql_field_type($result, $offset);
Break;
Case "pg":
$r = pg_fieldtype($result, $offset);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取字段長(zhǎng)度
*************************************************************************************/
Function FieldLength($result, $offset)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_field_length($result, $offset);
Break;
Case "mysql":
$r = mysql_field_len($result, $offset);
Break;
Case "pg":
$r = pg_fieldsize($result, $offset);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取數(shù)據(jù)并保存到數(shù)組，可以用數(shù)字索引方式訪問(wèn)數(shù)組
*************************************************************************************/
Function FetchRow($result, $RowNumber = 0)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_fetch_row($result);
Break;
Case "mysql":
$r = mysql_fetch_row($result);
Break;
Case "pg":
$r = pg_fetch_row($result, $RowNumber);
If ($r) {
$this->curRow[$result] = $RowNumber;
$this->seek[$result] = $RowNumber;
}
Break;
Default:
$r = False;
Break;
}
Return $r;
}
 
/************************************************************************************
*獲取數(shù)據(jù)并保存到數(shù)組，可以用數(shù)字索引和關(guān)聯(lián)索引的方式訪問(wèn)
*************************************************************************************/
Function FetchArray($result, $RowNumber = 0, $ResultType = 2)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_fetch_array($result);
Break;
Case "mysql":
$r = mysql_fetch_array($result);
Break;
Case "pg":
$r = pg_fetch_array($result, $RowNumber, $ResultType);
If ($r) {
$this->curRow[$result] = $RowNumber;
$this->seek[$result] = $RowNumber;
}
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取數(shù)據(jù)并保存到對(duì)象
*************************************************************************************/
Function FetchObject($result, $RowNumber = 0, $ResultType = 2)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_fetch_object($result);
Break;
Case "mysql":
$r = mysql_fetch_object($result);
Break;
Case "pg":
$r = pg_fetch_object($result, $RowNumber, $ResultType);
If ($r) {
$this->curRow[$result] = $RowNumber;
$this->seek[$result] = $RowNumber;
}
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取結(jié)果數(shù)據(jù)
*************************************************************************************/
Function Result($result, $RowNumber, $FieldName)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_result($result, $RowNumber, $FieldName);
Break;
Case "mysql":
$r = mysql_result($result, $RowNumber, $FieldName);
Break;
Case "pg":
$r = pg_result($result, $RowNumber, $FieldName);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*釋放結(jié)果數(shù)據(jù)
*************************************************************************************/
Function FreeResult($result)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_free_result($result);
Break;
Case "mysql":
$r = mysql_free_result($result);
Break;
Case "pg":
$r = pg_freeresult($result);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取記錄數(shù)量
*************************************************************************************/
Function RowsNumber($result)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_num_rows($result);
Break;
Case "mysql":
$r = mysql_num_rows($result);
Break;
Case "pg":
$r = pg_numrows($result);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取字段數(shù)量
*************************************************************************************/
Function FieldsNumber($result)
{
Switch ($this->dbType) {
Case "mssql":
$r = mssql_num_fields($result);
Break;
Case "mysql":
$r = mysql_num_fields($result);
Break;
Case "pg":
$r = pg_numfields($result);
Break;
Default:
$r = False;
Break;
}
Return $r;
}
/************************************************************************************
*獲取當(dāng)前記錄號(hào)（從0開(kāi)始）
*************************************************************************************/
Function CurRecNumber($result)
{
$r = $this->curRow[$result];
Return $r;
}
/************************************************************************************
*獲取當(dāng)前行號(hào)（從1開(kāi)始）
*************************************************************************************/
Function RecordNumber($result)
{
$cr = $this->CurRecNumber($result) + 1;
Return $cr;
}
/************************************************************************************
*移動(dòng)到第一條記錄
*************************************************************************************/
Function MoveFirstRec($result)
{
Switch ($this->dbType) {
Case "pg":
$r = $this->FetchRow($result, 0);
Break;
Default:
$rn = $this->DataSeek($result, 0);
If ($rn) {
$r = $this->FetchRow($result);
If ($r) $this->curRow[$result] = $this->seek[$result];
} Else {
$r = False;
}
Break;
}
Return $r;
}
/************************************************************************************
*移動(dòng)到最后一條記錄
*************************************************************************************/
Function MoveLastRec($result)
{
$rs = $this->RowsNumber($result);
If ($rs) {
$rs--;
Switch ($this->dbType) {
Case "pg":
$r = $this->FetchRow($result, $rs);
Break;
Default:
$rn = $this->DataSeek($result, $rs);
If ($rn) {
$r = $this->FetchRow($result);
If ($r) $this->curRow[$result] = $this->seek[$result];
} Else {
$r = False;
}
Break;
}
}
Return $r;
}
/************************************************************************************
*移動(dòng)到前一條記錄
*************************************************************************************/
Function MovePreviousRec($result)
{
$rs = $this->CurRecNumber($result);
If ($rs) {
$rs--;
Switch ($this->dbType) {
Case "pg":
$r = $this->FetchRow($result, $rs);
Break;
Default:
$rn = $this->DataSeek($result, $rs);
If ($rn) {
$r = $this->FetchRow($result);
If ($r) $this->curRow[$result] = $this->seek[$result];
} Else {
$r = False;
}
Break;
}
}
Return $r;
}
/************************************************************************************
*移動(dòng)到下一條記錄
*************************************************************************************/
Function MoveNextRec($result)
{
$rs = $this->CurRecNumber($result);
$rn = $this->RowsNumber($result);
$rs++;
If ($rs != $rn) {
Switch ($this->dbType) {
Case "pg":
$r = $this->FetchRow($result, $rs);
Break;
Default:
$re = $this->FetchRow($result);
If ($re) {
$r = $re;
$this->curRow[$result]++;
$this->seek[$result] = $this->curRow[$result];
} Else {
$r = False;
}
Break;
}
}
Return $r;
}
/************************************************************************************
*移動(dòng)到指定記錄（編號(hào)從0開(kāi)始）
*************************************************************************************/
Function MoveToRec($result, $RowNumber)
{
$rn = $this->RowsNumber($result);
If ($RowNumber > 0 And $RowNumber < $rn) {
$RowNumber--;
Switch ($this->dbType) {
Case "pg":
$r = $this->FetchRow($result, $RowNumber);
Break;
Default:
$rn = $this->DataSeek($result, $RowNumber);
If ($rn) {
$r = $this->FetchRow($result);
If ($r) $this->curRow[$result] = $this->seek[$result];
} Else {
$r = False;
}
Break;
}
}
Return $r;
}
}
//********************************方法實(shí)現(xiàn)完畢****************************************//
?>