discuz7 phpMysql操作类

<?php 
/* 
* MySql数据库连接类 
* mysql.class.php 2009.04.15 by Hackbaby 
*/ 
class dbstuff { 
var $version = ''; 
var $querynum = 0; 
var $link = null; 
//连接数据库 
function connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect = 0, $halt = TRUE, $dbcharset2 = '') { 
$conn = empty($pconnect) ? 'mysql_connect' : 'mysql_pconnect'; 
if (!$this->link = @$conn($dbhost, $dbuser, $dbpw, 1)) { 
$halt && $this->halt('Can not connect to MySQL server'); 
} else { 
if($this->version() > '4.1') { 
global $charset, $dbcharset; 
$dbcharset = $dbcharset2 ? $dbcharset2 : $dbcharset; 
$dbcharset = !$dbcharset && in_array(strtolower($charset), array('gbk', 'big5', 'utf-8')) ? str_replace('-', '', $charset) : $dbcharset; 
$serverset = $dbcharset ? 'character_set_connection='.$dbcharset.', character_set_results='.$dbcharset.', character_set_client=binary' : ''; 
$serverset .= $this->version() > '5.0.1' ? ((empty($serverset) ? '' : ',').'sql_mode=\'\'') : ''; 
$serverset && mysql_query("SET $serverset", $this->link); 
} 
$dbname && @mysql_select_db($dbname, $this->link); 
} } 
//选择数据库 
function select_db($dbname) { 
return mysql_select_db($dbname, $this->link); 
} 
//数据库执行后的返回方法 
function fetch_array($query, $result_type = MYSQL_ASSOC) { 
return mysql_fetch_array($query, $result_type); 
} 
//返回fetch_array方法执行后的返回值 
function fetch_first($sql) { 
return $this->fetch_array($this->query($sql)); 
} 
//返回result方法执行后的返回值 
function result_first($sql) { 
return $this->result($this->query($sql), 0); 
} 
//执行对数据库的操作 
function query($sql, $type = '') { 
global $debug, $discuz_starttime, $sqldebug, $sqlspenttimes; 
//判断debug调试 
if(defined('SYS_DEBUG') && SYS_DEBUG) { 
@include_once WEB_ROOT.'./include/debug.func.php'; 
sqldebug($sql); 
} 
// 
$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ? 
'mysql_unbuffered_query' : 'mysql_query'; 
if(!($query = $func($sql, $this->link))) { 
if(in_array($this->errno(), array(2006, 2013)) && substr($type, 0, 5) != 'RETRY') { 
$this->close(); 
require './config.inc.php'; 
$this->connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect, true, $dbcharset); 
$this->query($sql, 'RETRY'.$type); 
} elseif($type != 'SILENT' && substr($type, 5) != 'SILENT') { 
$this->halt('MySQL Query Error', $sql); 
} 
} 
//查询条数加1 
$this->querynum++; 
return $query; 
} 
//取得前一次 MySQL 操作所影响的记录行数 
function affected_rows() { 
return mysql_affected_rows($this->link); 
} 
//数据库的文本错误提示 
function error() { 
return (($this->link) ? mysql_error($this->link) : mysql_error()); 
} 
//返回上一个 MySQL 操作中的错误信息的数字编码 
function errno() { 
return intval(($this->link) ? mysql_errno($this->link) : mysql_errno()); 
} 
//返回数据库操作结果 
function result($query, $row = 0) { 
$query = @mysql_result($query, $row); 
return $query; 
} 
//返回数据库查询等操作的数目 
function num_rows($query) { 
$query = mysql_num_rows($query); 
return $query; 
} 
//取得结果集中字段的数目 
function num_fields($query) { 
return mysql_num_fields($query); 
} 
//释放结果内存 
function free_result($query) { 
return mysql_free_result($query); 
} 
//取得上一步 INSERT 操作产生的 ID 
function insert_id() { 
return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0); 
} 
//以数组的形式返回查询结果 
function fetch_row($query) { 
$query = mysql_fetch_row($query); 
return $query; 
} 
//从结果集中取得列信息并作为对象返回 
function fetch_fields($query) { 
return mysql_fetch_field($query); 
} 
//获取Mysql的版本 
function version() { 
if(empty($this->version)) { 
$this->version = mysql_get_server_info($this->link); 
} 
return $this->version; 
} 
//关闭连接 
function close() { 
return mysql_close($this->link); 
} 
//错误提示 
function halt($message = '', $sql = '') { 
define('CACHE_FORBIDDEN', TRUE); 
require_once WEB_ROOT . './include/db_mysql_error.inc.php'; 
} 
} 
?>