链接数据库

打开扩展  extension=php_pdo.dll

$pdo = new PDO("mysql:host=localhost;dbname=db_demo","root",""); 
$rs = $pdo -> query("select * from test"); 
while($row = $rs -> fetch()){ 
print_r($row); 

$pdo = new PDO("mysql:host=localhost;dbname=db_demo","root",""); 
if($pdo -> exec("insert into db_demo(name,content) values('title','content')")){ 
echo "插入成功！"; 
echo $pdo -> lastinsertid(); 
} 

php5.5 之后就已经不再支持mysql_connect 了

$dbname = 'zhuanfa';
$host = 'localhost';
$user = 'root';
$pwd = 'root';
$port = '3306';


$server = $this->db_mysql_hostname.':'.$this->db_mysql_port;
$this->conn = mysql_connect($server,$this->db_mysql_username,$this->db_mysql_password,true) or die('');

$this->conn = mysql_connect('localhost','root','root',true) or die('');

 mysql_select_db($this->db_mysql_database,$this->conn) or die('');   //选择数据库
 mysql_query("set names " . $this->db_mysql_charset, $this->conn);   //设置编码 utf-8

$host="localhost";
$user="root";
$password="abcdefg";
$conn=@mysql_connect($host,$user,$password);
if(!$conn)
{
die ("连接MYSQL服务器失败。".mysql_error());
}
else
{
echo "MYSQL服务器：$host <br>用户名称：$user <br>";
echo "连接MYSQL服务器成功。";
}