PHP连接mysql数据库

<?php  
    $dbhost = 'localhost:3306';  
    $dbuser = 'root';  
    $dbpass = 'root';  
    $conn = mysql_connect($dbhost, $dbuser, $dbpass);  
    if(! $conn )  
    {  
      echo 'Connect failure';  
    }  
    echo 'Connected successfully';  
    mysql_close();  
?>