php连接mssql的一些相关经验及注意事项
php连接mssql对于很多朋友或许已经是老生长谈,习以为常了,不过本文还是要唠叨一下,主要以分享连接数据库的相关经验,感兴趣的你可千万不要错过,或许本文对你有所帮助呢
为了能让PHP连接MSSQL,系统需要安装MSSQL,PHP,且在PHP.ini中的配置中,将
;extension=php_mssql.dll前面的;去掉
1.连接MSSQL
代码如下:
$conn=mssql_connect("实例名或者服务器IP","用户名","密码");
//测试连接
if($conn)
{
echo"连接成功";
}
2.选择要连接的数据库
代码如下:
mssql_select_db("dbname");
3.执行查询
代码如下:
$rs=mssql_query("selecttop1id,usernamefromtbname",$conn);
或者直接执行update,insert等语句,可以不用为返回结果赋值
mssql_query("updatetbnamesetusername='niunv'whereid=1");
4.获取记录集行数
代码如下:
echomssql_num_rows($rs);
5.获取记录集
代码如下:
if($row=mssql_fetch_array($rs))
{
$id=$row[0];//获取ID字段值
$username=$row[1];//获取username字段值
}
6.获取新增记录的ID
将id字段设置为IDENTITY字段,执行insert语句以后,就会产生一个@@IDENTITY全局变量值,查询出来就是最后一条新增记录的ID了.
代码如下:
mssql_query("insertintotbname(username)values('nv')",$conn);
$rs=mssql_query("select@@IDENTITYasid",$conn);
if($row=mssql_fetch_array($rs))
{
echo$row[0];
}
7.释放记录集
代码如下:
mssql_free_result($rs);
8.关闭连接
代码如下:
mssql_close($conn);
注:用PHP操作MSSQL比在ASP连接MYSQL要简单,所以,当需要MSSQL与MYSQL并存时,用PHP连接MSSQL来操作MYSQL与MSSQL并存比较简单好用.如果是ASP连接MYSQL,需要安装一个MYSQL驱动,默认windows的ODBC没有安装,很遗憾...
1.在web服务器上至少安装了mssql的客户端
2.打开php.ini把;extension=php_mssql.dll前面的分号去掉
有必要话:需要制定extension_dir
3.推荐使用php4.数据库的连接分页可以到phpe.net上获取到相应的class
下面是我根据那里修改的一个class
代码如下:
/**
*mssql数据库连接类
**/
classSQL{
var$server;
var$userName;
var$passWord;
var$dataBase;
var$linkID=0;
var$queryResult;
var$lastInsertID;
var$pageNum=0;//分页用---共有几条数据
var$ER;
/**
*构造函数
**/
functionSQL($Server='',$UserName='',$PassWord='',$DataBase=''){
$this->server=$Server;
$this->userName=$UserName;
$this->passWord=$PassWord;
$this->dataBase=$DataBase;
}
/**
*数据库连接
**/
functiondb_connect(){
$this->linkID=mssql_pconnect($this->server,$this->userName,$this->passWord);
if(!$this->linkID){
$this->ER="db_connect($this->server,$this->userName,$this->passWord)error";
return0;
}
if(!mssql_select_db($this->dataBase,$this->linkID)){
$this->ER="mssql_select_db($this->dataBase,$this->lastInsertID)error";
return0;
}
return$this->linkID;
}
/**public
*function:Checkthedatabase,ifexistthenselect
*exist:return1
*notexist:return0
*/
functionselectDatabase(){
if(mssql_select_db($this->dataBase))
return1;
else
return0;
}
/**
*数据操作
**/
functionquery($Str){
if($this->linkID==0){
$this->ER="数据库还没有连接!!";
}
$this->queryResult=mssql_query($Str);
//$this->queryResult=mssql_query($Str,$this->linkID);
if(!$this->queryResult){
$this->ER="$Str.没有操作成功,queryerror!!";
return0;//****************对于php4.3.9以上版本的错误用1
}
return$this->queryResult;
}
/**
*数据获取
**/
functionfetch_array($result){
if($result!="")$this->queryResult=$result;
$rec=mssql_fetch_array($this->queryResult);
if(is_array($rec)){
return$rec;
}
//$this->ER="没有获取数据!";
return0;
}
/**public
*function:FreetheQueryResult
*successreturn1
*failed:return0
*/
functionfreeResult($result=""){
if($result!="")$this->queryResult=$result;
returnmssql_free_result($this->queryResult);
}
/**
*获取影响的的行数
*获取操作过的行数
**/
functionnum_rows($result=""){
if($result!=""){
$this->queryResult=$result;
$row=mssql_num_rows($this->queryResult);
return$row;
}
}
/**
*获取查询结果---多个
**/
functionresult_ar($str=''){
if(empty($str)){
return0;
}
$back=array();
$this->queryResult=$this->query($str);
while($row=$this->fetch_array($this->queryResult)){
$back[]=$row;
}
return$back;
}
/**
*数据库信息分页
*$Result数据库操作
*str==sql语句
*page==第几页
*showNum==显示几页
*/
functionpage($Str,$Page=0,$ShowNum=5){
$back=array();//返回数据
$maxNum=0;
if($Str==""){
$this->ER="没有数据";
return0;
}
$this->queryResult=$this->query($Str);
if($this->queryResult){
if($Page==""){
$nopa=0;
}else{
$nopa=($Page-1)*$ShowNum;
if($nopa$nopa=0;
}
}
$maxNum=$this->num_rows($this->queryResult);
$k=0;
$i=0;
$dd=$this->fetch_array($this->queryResult);
while($dd&&$nopaif($nopa>=$maxNum)$nopa=$maxNum;
mssql_data_seek($this->queryResult,$nopa);
$row=$this->fetch_array($this->queryResult);
$nopa++;
$i++;
$back[]=$row;
if($nopa>=$maxNum){
break;
}
}
}
$this->pageNum=$maxNum;
return$back;
}
/**
*分页的html页码
*/
functionpage_html($DataNum=0,$Page=1,$ShowNum=3,$web,$Post=''){
if($DataNum==0){
$back="没有要查询的数据";
}else{
if($ShowNum$ShowNum=3;
}
if($Page$Page=1;
}
if(empty($web)){
$web="#";
}
$pageNum=ceil($DataNum/$ShowNum);
if($Page$top="首页}else{
$top="
}
if($Page!==1){
$upPage="
}else{
$upPage="上一页";
}
if($Page$downPage="
}else{
$downPage="下一页";
}
if($Page==$pageNum){
$foot=">>尾页";
}else{
$foot="
}
$back=共$pageNum页
第$Page/$pageNum页$top $upPage $downPage $foot
EOT;
}
return$back;
}
}//endclass
?>

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