mysql 数据库操作类
本款是利用php mysql 数据库操作类函数,可以删除,修改,增加,备份等对数据库的操作,同时还支持两种数据库连接方式,以前数据库编码等的设置,代码如下:
- 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');
- }
- }