mysql数据库操作类本款是利用php mysql 数据库操作类函数，他可以删除，修改，增加，备份等对数据库的操作哦，同时还支持两种数据库连接方式 哦，以前数据库编码等的设置。
mysql教程 数据库教程操作类本款是利用php教程 mysql 数据库操作类函数，他可以删除，修改，增加，备份等对数据库的操作哦，同时还支持两种数据库连接方式 哦，以前数据库编码等的设置。
*/ class dbstuff {var $querynum = 0;var $link;var $sqlid;var $record;var $dbcharset='utf-8';var $charset='utf-8';function connect($dbhost, $dbuser, $dbpw, $dbname = '', $pconnect = 0, $halt = true) {if($pconnect) {if(!$this->link = @mysql_pconnect($dbhost, $dbuser, $dbpw)) {$halt && $this->halt('can not connect to mysql server');}} else {if(!$this->link = @mysql_connect($dbhost, $dbuser, $dbpw, 1)) {$halt && $this->halt('can not connect to mysql server');}}if($this->version() > '4.1') {global $charset, $dbcharset;if(!$dbcharset && in_array(strtolower($charset), array('gbk', 'big5', 'utf-8'))) {$dbcharset = str_replace('-', '', $charset);}if($dbcharset) {@mysql_query("set character_set_connection=$dbcharset, character_set_results=$dbcharset, character_set_client=binary", $this->link);}if($this->version() > '5.0.1') {@mysql_query("set sql_mode=''", $this->link);}}if($dbname) {@mysql_select_db($dbname, $this->link);}}function select_db($dbname) {return mysql_select_db($dbname, $this->link);}function fetch_array($query, $result_type = mysql_assoc) {return mysql_fetch_array($query, $result_type);}function query($sql, $type = '') {global $debug, $discuz_starttime, $sqldebug, $sqlspenttimes;$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();$this->connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect);$this->query($sql, 'retry'.$type);} elseif($type != 'silent' && substr($type, 5) != 'silent') {$this->halt('mysql query error', $sql);}}$this->querynum++;$this->sqlid=$query;return $query;}function affected_rows() {return mysql_affected_rows($this->link);}function error() {return (($this->link) ? mysql_error($this->link) : mysql_error());}function errno() {return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());}function result($query, $row) {$query = @mysql_result($query, $row);return $query;}function result_first($sql) {return $this->result($this->query($sql), 0);}function num_rows($query) {$query = mysql_num_rows($query);return $query;}function num_fields($query) {return mysql_num_fields($query);}function free_result($query) {return mysql_free_result($query);}function insert_id() {return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("select last_insert_id()"), 0);}function fetch_row($query) {$query = mysql_fetch_row($query);return $query;}function fetch_fields($query) {return mysql_fetch_field($query);}function version() {return mysql_get_server_info($this->link);}function close() {return mysql_close($this->link);}function nr($sql_id="") {if(!$sql_id) $sql_id=$this->sqlid;return mysql_num_rows($sql_id);}function nf($sql_id="") {if(!$sql_id) $sql_id=$this->sqlid;return mysql_num_fields($sql_id);}function nextrecord($sql_id="") {if(!$sql_id) $sql_id=$this->sqlid;if($this->record=mysql_fetch_array($sql_id)) return $this->record;else return false;}function f($name) {if($this->record[$name]) return $this->record[$name];else return false;}function lock($tblname,$op="write") {if(mysql_query("lock tables ".$tblname." ".$op)) return true;else return false;}function unlock(){if(mysql_query("unlock tables")) return true; else return false;}function ar() {return @mysql_affected_rows($this->link);}function i_id() {return mysql_insert_id();}function halt($message = '', $sql = '') {define('cache_forbidden', true);include('db_mysql_error.inc.php');}}?>