我正在使用Mac OS X Lion Server运行MySQL数据库。我在我的服务器上运行了一个想要访问数据库的PHP脚本。 PHP脚本在这里：
/库/服务器/网络/数据/网站/默认
数据库在这里：
的/ usr /本地/ MySQL的
如果PHP脚本不在同一目录中（数据库在其上方），如何让PHP脚本访问数据库。谢谢你的帮助！
以下是我遇到的错误：
Connect failed: No such file or directory?There seems to have been a slight problem with our database, please try again later.<br /><br />? <textarea rows="10" cols="80">MySQL Error:???42??Error: ?Error #: ? Filename:
在我的PHP文件中，这是我用来访问数据库的代码：
$this->DB_HOST = '67.85.14.141';
$this->DB_USERNAME = 'username';
$this->DB_PASSWORD = 'password';
$this->DB_DATABASE = 'Carillons';
下面的其余代码：
/**
* Begin Document
*/
class DbConnect
{
/**
* Connection to MySQL.
*
* @var string
*/
var $link;
/**
* Holds the most recent connection.
*
* @var string
*/
var $recent_link = null;
/**
* Holds the contents of the most recent SQL query.
*
* @var string
*/
var $sql = '';
/**
* Holds the number of queries executed.
*
* @var integer
*/
var $query_count = 0;
/**
* The text of the most recent database error message.
*
* @var string
*/
var $error = '';
/**
* The error number of the most recent database error message.
*
* @var integer
*/
var $errno = '';
/**
* Do we currently have a lock in place?
*
* @var boolean
*/
var $is_locked = false;
/**
* Show errors? If set to true, the error message/sql is displayed.
*
* @var boolean
*/
var $show_errors = false;
/**
* Log errors? If set to true, the error message/sql is logged.
*
* @var boolean
*/
public $log_errors = false;
/**
* The Database.
*
* @var string
*/
public $DB_DATABASE;
/**
* The variable used to contain a singleton instance of the database connection.
*
* @var string
*/
static $instance;
/**
* The number of rows affected by the most recent query.
*
* @var string
*/
public $affected_rows;
public $insert_id;
/**
* Constructor. Initializes a database connection and selects our database.
*/
function __construct()
{
$this->DB_HOST = '67.85.14.141';
$this->DB_USERNAME = 'username'; // !!! CHANGE ME
$this->DB_PASSWORD = 'password'; // !!! CHANGE ME
$this->DB_DATABASE = 'Carillons'; // !!! CHANGE ME
}
/**
* Singleton pattern to retrieve database connection.
*
* @return mixed MySQL database connection
*/
function _get($property)
{
if(self::$instance == NULL)
{
self::$instance = $this->connect();
}
return self::$instance->$property;
}
/**
* Singleton pattern to retrieve database connection.
*
* @return mixed MySQL database connection
*/
function Connection()
{
if(self::$instance == NULL)
{
self::$instance = $this->connect();
}
return self::$instance;
}
/**
* Connect to the Database.
*
*/
function connect()
{
self::$instance = new mysqli($this->DB_HOST, $this->DB_USERNAME, $this->DB_PASSWORD, $this->DB_DATABASE);
if (mysqli_connect_errno()) {
$this->raise_error(printf("Connect failed: %s\n", mysqli_connect_error()));
}
return self::$instance;
}
/**
* Executes a sql query. If optional $only_first is set to true, it will
* return the first row of the result as an array.
*
* @param string Query to run
* @param bool Return only the first row, as an array?
* @return mixed
*/
function query($sql, $only_first = false)
{
if(self::$instance == NULL)
{
self::$instance = $this->connect();
}
$this->recent_link =& self::$instance;
$this->sql =& $sql;
if(!$result = self::$instance->query($sql))
{
$this->raise_error(printf("Connect failed: %s\n", self::$instance->error));
}
$this->affected_rows = self::$instance->affected_rows;
$this->insert_id = self::$instance->insert_id;
$this->query_count++;
if ($only_first)
{
$return = $result->fetch_array(MYSQLI_ASSOC);
$this->free_result($result);
return $return;
}
return $result;
}
/**
* Fetches a row from a query result and returns the values from that row as an array.
*
* @param string The query result we are dealing with.
* @return array
*/
function fetch_array($result)
{
return @mysql_fetch_assoc($result);
}
/**
* Returns the number of rows in a result set.
*
* @param string The query result we are dealing with.
* @return integer
*/
function num_rows($result)
{
return self::$instance->num_rows;
}
/**
* Retuns the number of rows affected by the most recent query
*
* @return integer
*/
function affected_rows()
{
return self::$instance->affected_rows;
}
/**
* Returns the number of queries executed.
*
* @param none
* @return integer
*/
function num_queries()
{
return $this->query_count;
}
/**
* Lock database tables
*
* @param array Array of table => lock type
* @return void
*/
function lock($tables)
{
if (is_array($tables) AND count($tables))
{
$sql = '';
foreach ($tables AS $name => $type)
{
$sql .= (!empty($sql) ? ', ' : '') . "$name $type";
}
$this->query("LOCK TABLES $sql");
$this->is_locked = true;
}
}
/**
* Unlock tables
*/
function unlock()
{
if ($this->is_locked)
{
$this->query("UNLOCK TABLES");
}
}
/**
* Returns the ID of the most recently inserted item in an auto_increment field
*
* @return integer
*/
function insert_id()
{
return self::$instance->insert_id;
}
/**
* Escapes a value to make it safe for using in queries.
*
* @param string Value to be escaped
* @param bool Do we need to escape this string for a LIKE statement?
* @return string
*/
function prepare($value, $do_like = false)
{
if(self::$instance == NULL)
{
self::$instance = $this->connect();
}
if ($do_like)
{
$value = str_replace(array('%', '_'), array('\%', '\_'), $value);
}
return self::$instance->real_escape_string($value);
}
/**
* Frees memory associated with a query result.
*
* @param string The query result we are dealing with.
* @return boolean
*/
function free_result($result)
{
return @mysql_free_result($result);
}
/**
* Turns database error reporting on
*/
function show_errors()
{
$this->show_errors = true;
}
/**
* Turns database error reporting off
*/
function hide_errors()
{
$this->show_errors = false;
}
/**
* Closes our connection to MySQL.
*
* @param none
* @return boolean
*/
function close()
{
$this->sql = '';
return self::$instance->close();
}
/**
* Returns the MySQL error message.
*
* @param none
* @return string
*/
function error()
{
$this->error = (is_null($this->recent_link)) ? '' : self::$instance->error;
return $this->error;
}
/**
* Returns the MySQL error number.
*
* @param none
* @return string
*/
function errno()
{
$this->errno = (is_null($this->recent_link)) ? 0 : self::$instance->errno ;
return $this->errno;
}
/**
* Gets the url/path of where we are when a MySQL error occurs.
*
* @access private
* @param none
* @return string
*/
function _get_error_path()
{
if ($_SERVER['REQUEST_URI'])
{
$errorpath = $_SERVER['REQUEST_URI'];
}
else
{
if ($_SERVER['PATH_INFO'])
{
$errorpath = $_SERVER['PATH_INFO'];
}
else
{
$errorpath = $_SERVER['PHP_SELF'];
}
if ($_SERVER['QUERY_STRING'])
{
$errorpath .= '?' . $_SERVER['QUERY_STRING'];
}
}
if (($pos = strpos($errorpath, '?')) !== false)
{
$errorpath = urldecode(substr($errorpath, 0, $pos)) . substr($errorpath, $pos);
}
else
{
$errorpath = urldecode($errorpath);
}
return $_SERVER['HTTP_HOST'] . $errorpath;
}
/**
* If there is a database error, the script will be stopped and an error message displayed.
*
* @param string The error message. If empty, one will be built with $this->sql.
* @return string
*/
function raise_error($error_message = '')
{
if ($this->recent_link)
{
$this->error = $this->error($this->recent_link);
$this->errno = $this->errno($this->recent_link);
}
if ($error_message == '')
{
$this->sql = "Error in SQL query:\n\n" . rtrim($this->sql) . ';';
$error_message =& $this->sql;
}
else
{
$error_message = $error_message . ($this->sql != '' ? "\n\nSQL:" . rtrim($this->sql) . ';' : '');
}
$message = "<textarea rows=\"10\" cols=\"80\">MySQL Error:\n\n\n$error_message\n\nError: {$this->error}\nError #: {$this->errno}\nFilename: " . $this->_get_error_path() . "\n</textarea>";
if (!$this->show_errors)
{
$message = "<!--\n\n$message\n\n-->";
}
else die("There seems to have been a slight problem with our database, please try again later.<br /><br />\n$message");
}
}
?>
答案 0 :(得分：1)
不会根据文件访问MySQL。
只要它正在运行，你只需要mysql数据库的服务器名称用户名和密码。
答案 1 :(得分：1)
我是一个java编码器，但是mysql数据库可以通过网络连接到本地文件系统。基本上你需要php库或模块与mysql db对话，它可能是一个标准的插件。对于java，它是一个名为connector for j。
的特定库要获得Neal所说的正确连接到db，您只需要主机名或ip，用户名，密码和数据库名称。有时候这些都被组合成一个叫做数据库连接字符串的东西。
这是一个可能有用的链接，因为我不熟悉php：
祝你好运！