PHP连接数据库代码方法

1.Connect to Ms SQL

<?php

$myServer = localhost; //主机
$myUser = sa; //用户名
$myPass = password; //密码
$myDB = Northwind;  //MSSQL库名

$s = @mssql_connect($myServer, $myUser, $myPass)
or die(Couldnt connect to SQL Server on $myServer);

$d = @mssql_select_db($myDB, $s)
or die(Couldnt open database $myDB);

$query = SELECT TitleOfCourtesy+ +FirstName+ +LastName AS Employee ;
$query .= FROM Employees ;
$query .= WHERE Country=USA AND Left(HomePhone, 5) = (206);

$result = mssql_query($query);
$numRows = mssql_num_rows($result);

echo <h1> . $numRows . Row . ($numRows == 1 ? : s) . Returned </h1>;

while($row = mssql_fetch_array($result))
{
echo <li> . $row[Employee] . </li>;
}

?>

2.Connect to Access

<?
　　$conn = new com("ADODB.Connection");
　　$connstr = "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=". realpath("data/db.mdb");
　　$conn->Open($connstr);
　　$rs = new com("ADODB.RecordSet");
　　$rs->Open("select * from szd_t",$conn,1,1);
　　while(! $rs->eof) {
　　$f = $rs->Fields(1);
　　echo $f->value;
　　$rs->MoveNext();
　　}
　　?>

3.Connect to MySQL

<?php
$mysql_server_name='localhost';      //改成自己的mysql数据库服务器
$mysql_username='root';                  //改成自己的mysql数据库用户名
$mysql_password='root';        //改成自己的mysql数据库密码
$mysql_database=mydatabase;        //改成自己的mysql数据库名

$conn=mysql_connect($mysql_server_name,$mysql_username,$mysql_password,$mysql_database);
$sql='CREATE DATABASE mycounter DEFAULT CHARACTER SET gbk COLLATE gbk_chinese_ci;
';
mysql_query($sql);
$sql='CREATE TABLE `counter` (`id` INT(255) UNSIGNED NOT NULL AUTO_INCREMENT ,`count` INT(255) UNSIGNED NOT NULL DEFAULT 0,PRIMARY KEY ( `id` ) ) TYPE = innodb;';
mysql_select_db($mysql_database,$conn);
$result=mysql_query($sql);
//echo $sql;
mysql_close($conn);

?>