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
复制代码 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
复制代码 代码如下:
mssql_select_db("dbname");
3.执行查询
复制代码 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
复制代码 代码如下:
echomssql_num_rows($rs);
5.获取记录集
复制代码 代码如下:
if($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.
复制代码 代码如下:
mssql_query("insertintotbname(username)values('nv')",$conn);
$rs=mssql_query("select@@IDENTITYasid",$conn);
if($row=mssql_fetch_array($rs))
{
echo$row[0];
}
7.释放记录集
复制代码 代码如下:
mssql_free_result($rs);
8.关闭连接
复制代码 代码如下:
mssql_close($conn);
注:用PHP操作MSSQL比在ASP连接MYSQL要简单,所以,当需要MSSQL与MYSQL并存时,用PHP连接MSSQL来操作MYSQL与MSSQL并存比较简单好用.如果是ASP连接MYSQL,需要安装一个MYSQL驱动,默认windows的ODBC没有安装,很遗憾...
1.在web服务器上至少安装了mssql的客户端
2.打开php.ini把;extension=php_mssql.dll前面的分号去掉
有必要话:需要制定extension_dir
3.推荐使用php4.数据库的连接分页可以到phpe.net上获取到相应的class
下面是我根据那里修改的一个class
复制代码 代码如下:
/**
*mssql数据库连接类
**/
classSQL{
var$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
?>

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.


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