Php 访问数据库
我正在用MacOSX Lion服务器运行一个MySQL数据库。我的服务器上运行了一个PHP脚本，希望访问数据库。PHP脚本如下所示： /库/服务器/Web/数据/站点/默认值 数据库如下： /usr/local/mysql 如果PHP脚本不在同一目录中（数据库在其上方），如何让它们访问数据库。谢谢你的帮助 以下是我遇到的错误：Php 访问数据库,php,mysql,sql,directory,terminal,Php,Mysql,Sql,Directory,Terminal,我正在用MacOSX Lion服务器运行一个MySQL数据库。我的服务器上运行了一个PHP脚本，希望访问数据库。PHP脚本如下所示： /库/服务器/Web/数据/站点/默认值 数据库如下： /usr/local/mysql 如果PHP脚本不在同一目录中（数据库在其上方），如何让它们访问数据库。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
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:
/**
* 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$message");
}
}
?>
/**
*开始文档
*/
类DbConnect
{
/**
*连接到MySQL。
*
*@var字符串
*/
var$link；
/**
*保存最近的连接。
*
*@var字符串
*/
var$recent_link=null；
/**
*保存最新SQL查询的内容。
*
*@var字符串
*/
var$sql=''；
/**
*保存执行的查询数。
*
*@var整数
*/
var$query\u count=0；
/**
*最新数据库错误消息的文本。
*
*@var字符串
*/
var$error=''；
/**
*最新数据库错误消息的错误号。
*
*@var整数
*/
var$errno=''；
/**
*我们现在有锁吗？
*
*@var布尔值
*/
var$已锁定=错误；
/**
*显示错误？如果设置为true，则显示错误消息/sql。
*
*@var布尔值
*/
var$show_errors=false；
/**
*记录错误？如果设置为true，则记录错误消息/sql。
*
*@var布尔值
*/
public$log_errors=false；
/**
*数据库。
*
*@var字符串
*/
公共$DB_数据库；
/**
*用于包含数据库连接的单例实例的变量。
*
*@var字符串
*/
静态$实例；
/**
*受最近查询影响的行数。
*
*@var字符串
*/
受影响的公共行数；
公共$insert_id；
/**
*初始化数据库连接并选择我们的数据库。
*/
函数_u构造（）
{
$this->DB_HOST='67.85.14.141'；
$this->DB_USERNAME='USERNAME'；/！！！更改我
$this->DB_PASSWORD='PASSWORD'；/！！！更改我
$this->DB_数据库='Carillons'；/！！！更改我
}
/**
*检索数据库连接的单例模式。
*
*@return混合MySQL数据库连接
*/
函数_get（$property）
{
if（self:：$instance==NULL）
{
self:：$instance=$this->connect（）；
}
返回self:：$instance->$property；
}
/**
*检索数据库连接的单例模式。
*
*@return混合MySQL数据库连接
*/
函数连接（）
{
if（self:：$instance==NULL）
{
self:：$instance=$this->connect（）；
}
返回self:：$instance；
}
/**
*连接到数据库。
*
*/
函数连接（）
{
self:：$instance=newmysqli（$this->DB\u主机，$this->DB\u用户名，$this->DB\u密码，$this->DB\u数据库）；
if（mysqli\u connect\u errno（））{
$this->raise_error（printf（“连接失败：%s\n”，mysqli_Connect_error（））；
}
返回self:：$instance；
}
/**
*执行sql查询。如果可选的$only_first设置为true，则它将
*以数组形式返回结果的第一行。
*
*@param要运行的字符串查询
*@param bool仅返回第一行，作为数组？
*@返回混合
*/
函数查询（$sql，$only\u first=false）
{
if（self:：$instance==NULL）
{
self:：$instance=$this->connect（）；
}
$this->recent_link=&self:：$instance；
$this->sql=&$sql；
如果（！$result=self:：$instance->query（$sql））
{
$this->raise_错误（printf（“连接失败：%s\n”，self:：$instance->error））；
}
$this->infected_rows=self:：$instance->infected_rows；
$this->insert\u id=self:：$instance->insert\u id；
$this->query_count++；
如果（$only_first）
{
$return=$result->fetch_数组（MYSQLI_ASSOC）；
$this->free_result（$result）；
return$return；
}
返回$result；
}
/**
*从查询结果中获取一行，并将该行中的值作为数组返回。
*
*@param string我们正在处理的查询结果。
*@return数组
*/
函数fetch_数组（$result）
{
return@mysql\u fetch\u assoc（$result）；
}
/**
*返回结果集中的行数。
*
*@param string我们正在处理的查询结果。
*@返回整数
*/
函数num_行（$result）
{
返回self:：$instance->num\u行；
}
/**
*重新运行受最近查询影响的行数
*
*@返回整数
*/
受影响的函数\u行（）
{
返回self:：$instance->受影响的_行；
}
/**
*返回执行的查询数。
*
*@param-none
*@返回整数
*/
函数num_querys（）
{
返回$this->query\u count；
}
/**
*锁定数据库表
*
*@param表数组=>锁类型
*@返回无效
*/
函数锁（$tables）
{
if（is_数组（$tables）和count（$tables））
{
$sql=''；
foreach（$name=>$type形式的表）
{
$sql.=（！empty（$sql）？，'：''。“$name$type”；
}
$this->query（“锁表$sql”）；
$this->is_locked=true；
}
}
/**
*解锁表格
*/
函数解锁（）
{
如果（$此->已锁定）
{
$this->query（“解锁表”）；
}
}
/**
*返回自动增量字段中最近插入的项的ID
*
*@返回整数
*/
函数insert_id（）
{
返回self:：$instance->insert_id；
}
/**
*转义一个值以使其在查询中使用安全。
*
*要转义的@param字符串值
*@param bool我们需要为LIKE语句转义这个字符串吗？
*@返回字符串
*/
函数prepare（$value，$do_like=false）
{
if（self:：$instance==NULL）
{
self:：$instance=$this->connect（）；
}
如果（$do_like）
{
$value=str\u replace（数组（'%'，'\''），数组（'\%'，'\\''），$value）；
}
返回self:：$instance->real\u escape\u string（$value）；
}
/**
*释放与查询结果关联的内存。
*
*@param string我们正在处理的查询结果。
*@返回布尔值
*/
函数自由_结果（$result）
{
返回@mysql\u free\u result（$result）；
}
/**
*打开数据库错误报告
*/
函数show_errors（）
{
$this->show_errors=true；
}
/**
*关闭数据库错误报告
*/
函数隐藏错误
/**
* 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");
}
}
?>