mysql和Mysqli扩展区别说明:
mysql是非持继连接函数而mysqli是永远连接函数。
也就是说
mysql每次链接都会打开一个连接的进程而mysqli多次运行mysqli将使用同一连接进程,从而减少了服务器的开销
适用版本:Discuz!x2-x2.5
Discuz!x2使用方法
将以下代码粘贴至source/class/class_core.php中的
- class db_mysqli
- {
- var $tablepre;
- var $version = '';
- var $querynum = 0;
- var $slaveid = 0;
- var $curlink;
- var $link = array();
- var $config = array();
- var $sqldebug = array();
- var $map = array();
-
- function db_mysqli($config = array()) {
- if(!function_exists('mysqli_connect')) exit('mysqli extension not found!');
- if(!empty($config)) {
- $this->set_config($config);
- }
- }
-
- function set_config($config) {
- $this->config = &$config;
- $this->tablepre = $config['1']['tablepre'];
- if(!empty($this->config['map'])) {
- $this->map = $this->config['map'];
- }
- }
-
- function connect($serverid = 1) {
-
- if(empty($this->config) || empty($this->config[$serverid])) {
- $this->halt('config_db_not_found');
- }
-
- $this->link[$serverid] = $this->_dbconnect(
- $this->config[$serverid]['dbhost'],
- $this->config[$serverid]['dbuser'],
- $this->config[$serverid]['dbpw'],
- $this->config[$serverid]['dbcharset'],
- $this->config[$serverid]['dbname'],
- $this->config[$serverid]['pconnect']
- );
- $this->curlink = $this->link[$serverid];
-
- }
-
- function _dbconnect($dbhost, $dbuser, $dbpw, $dbcharset, $dbname, $pconnect) {
- $link = null;
- if(!$link = new mysqli($dbhost, $dbuser, $dbpw, $dbname)) {
- $this->halt('notconnect');
- } else {
- $this->curlink = $link;
- if($this->version() > '4.1') {
- $dbcharset = $dbcharset ? $dbcharset : $this->config[1]['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 && $link->query("SET $serverset");
- }
- }
- return $link;
- }
-
- function table_name($tablename) {
- if(!empty($this->map) && !empty($this->map[$tablename])) {
- $id = $this->map[$tablename];
- if(!$this->link[$id]) {
- $this->connect($id);
- }
- $this->curlink = $this->link[$id];
- } else {
- $this->curlink = $this->link[1];
- }
- return $this->tablepre.$tablename;
- }
-
- function select_db($dbname) {
- return $this->curlink->select_db($dbname);
- }
-
- function fetch_array($query, $result_type = MYSQLI_ASSOC) {
- return $query->fetch_array($result_type);
- }
-
- function fetch_first($sql) {
- return $this->fetch_array($this->query($sql));
- }
-
- function result_first($sql) {
- return $this->result($this->query($sql), 0);
- }
-
- function query($sql, $type = '') {
-
- if(defined('DISCUZ_DEBUG') && DISCUZ_DEBUG) {
- $starttime = dmicrotime();
- }
- $func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ? 'mysql_unbuffered_query' : 'mysql_query';
- if(!($query = $this->curlink->query($sql))) {
- if(in_array($this->errno(), array(2006, 2013)) && substr($type, 0, 5) != 'RETRY') {
- $this->connect();
- return $this->query($sql, 'RETRY'.$type);
- }
- if($type != 'SILENT' && substr($type, 5) != 'SILENT') {
- $this->halt('query_error', $sql);
- }
- }
-
- if(defined('DISCUZ_DEBUG') && DISCUZ_DEBUG) {
- $this->sqldebug[] = array($sql, number_format((dmicrotime() - $starttime), 6), debug_backtrace());
- }
-
- $this->querynum++;
- return $query;
- }
-
- function affected_rows() {
- return $this->curlink->affected_rows;
- }
-
- function error() {
- return $this->curlink->error;
- }
-
- function errno() {
- return intval($this->curlink->errno);
- }
-
- function result($query, $row = 0) {
- $query->data_seek($row);
- list($query) = $query->fetch_row();
- return $query;
- }
-
- function num_rows($query) {
- $query = $query->num_rows;
- return $query;
- }
-
- function num_fields($query) {
- return $query->field_count;
- }
-
- function free_result($query) {
- return $query->free_result();
- }
-
- function insert_id() {
- return ($id = $this->curlink->insert_id) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
- }
-
- function fetch_row($query) {
- $query = $query->fetch_row();
- return $query;
- }
-
- function fetch_fields($query) {
- return $query->fetch_field();
- }
-
- function version() {
- if(empty($this->version)) {
- $this->version = $this->curlink->client_version;
- }
- return $this->version;
- }
-
- function close() {
- return $this->curlink->close();
- }
-
- function halt($message = '', $sql = '') {
- require_once libfile('class/error');
- discuz_error::db_error($message, $sql);
- }
-
- }
复制代码
放
上面
查找
改为
保存就可以了
Discuz!x2.5 使用方法
1.创建文件db_driver_mysqli.php 上传到 网站目录source/class/db/下面
- <?php
- /**
- * [Discuz!] (C)2001-2099 Comsenz Inc.
- * This is NOT a freeware, use is subject to license terms
- *
- * $Id: db_driver_mysqli.php 33333 2013-05-28 09:10:48Z kamichen $
- */
- if(!defined('IN_DISCUZ')) {
- exit('Access Denied');
- }
- class db_driver_mysqli
- {
- var $tablepre;
- var $version = '';
- var $drivertype = 'mysqli';
- var $querynum = 0;
- var $slaveid = 0;
- var $curlink;
- var $link = array();
- var $config = array();
- var $sqldebug = array();
- var $map = array();
- function db_mysql($config = array()) {
- if(!empty($config)) {
- $this->set_config($config);
- }
- }
- function set_config($config) {
- $this->config = &$config;
- $this->tablepre = $config['1']['tablepre'];
- if(!empty($this->config['map'])) {
- $this->map = $this->config['map'];
- for($i = 1; $i <= 100; $i++) {
- if(isset($this->map['forum_thread'])) {
- $this->map['forum_thread_'.$i] = $this->map['forum_thread'];
- }
- if(isset($this->map['forum_post'])) {
- $this->map['forum_post_'.$i] = $this->map['forum_post'];
- }
- if(isset($this->map['forum_attachment']) && $i <= 10) {
- $this->map['forum_attachment_'.($i-1)] = $this->map['forum_attachment'];
- }
- }
- if(isset($this->map['common_member'])) {
- $this->map['common_member_archive'] =
- $this->map['common_member_count'] = $this->map['common_member_count_archive'] =
- $this->map['common_member_status'] = $this->map['common_member_status_archive'] =
- $this->map['common_member_profile'] = $this->map['common_member_profile_archive'] =
- $this->map['common_member_field_forum'] = $this->map['common_member_field_forum_archive'] =
- $this->map['common_member_field_home'] = $this->map['common_member_field_home_archive'] =
- $this->map['common_member_validate'] = $this->map['common_member_verify'] =
- $this->map['common_member_verify_info'] = $this->map['common_member'];
- }
- }
- }
- function connect($serverid = 1) {
- if(empty($this->config) || empty($this->config[$serverid])) {
- $this->halt('config_db_not_found');
- }
- $this->link[$serverid] = $this->_dbconnect(
- $this->config[$serverid]['dbhost'],
- $this->config[$serverid]['dbuser'],
- $this->config[$serverid]['dbpw'],
- $this->config[$serverid]['dbcharset'],
- $this->config[$serverid]['dbname'],
- $this->config[$serverid]['pconnect']
- );
- $this->curlink = $this->link[$serverid];
- }
- function _dbconnect($dbhost, $dbuser, $dbpw, $dbcharset, $dbname, $pconnect, $halt = true) {
- $link = new mysqli();
- if(!$link->real_connect($dbhost, $dbuser, $dbpw, $dbname, null, null, MYSQLI_CLIENT_COMPRESS)) {
- $halt && $this->halt('notconnect', $this->errno());
- } else {
- $this->curlink = $link;
- if($this->version() > '4.1') {
- $link->set_charset($dbcharset ? $dbcharset : $this->config[1]['dbcharset']);
- $serverset = $this->version() > '5.0.1' ? 'sql_mode=\'\'' : '';
- $serverset && $link->query("SET $serverset");
- }
- }
- return $link;
- }
- function table_name($tablename) {
- if(!empty($this->map) && !empty($this->map[$tablename])) {
- $id = $this->map[$tablename];
- if(!$this->link[$id]) {
- $this->connect($id);
- }
- $this->curlink = $this->link[$id];
- } else {
- $this->curlink = $this->link[1];
- }
- return $this->tablepre.$tablename;
- }
- function select_db($dbname) {
- return $this->curlink->select_db($dbname);
- }
- function fetch_array($query, $result_type = MYSQLI_ASSOC) {
- if($result_type == 'MYSQL_ASSOC') $result_type = MYSQLI_ASSOC;
- return $query ? $query->fetch_array($result_type) : null;
- }
- function fetch_first($sql) {
- return $this->fetch_array($this->query($sql));
- }
- function result_first($sql) {
- return $this->result($this->query($sql), 0);
- }
- public function query($sql, $silent = false, $unbuffered = false) {
- if(defined('DISCUZ_DEBUG') && DISCUZ_DEBUG) {
- $starttime = microtime(true);
- }
- if('UNBUFFERED' === $silent) {
- $silent = false;
- $unbuffered = true;
- } elseif('SILENT' === $silent) {
- $silent = true;
- $unbuffered = false;
- }
- $resultmode = $unbuffered ? MYSQLI_USE_RESULT : MYSQLI_STORE_RESULT;
- if(!($query = $this->curlink->query($sql, $resultmode))) {
- if(in_array($this->errno(), array(2006, 2013)) && substr($silent, 0, 5) != 'RETRY') {
- $this->connect();
- return $this->curlink->query($sql, 'RETRY'.$silent);
- }
- if(!$silent) {
- $this->halt($this->error(), $this->errno(), $sql);
- }
- }
- if(defined('DISCUZ_DEBUG') && DISCUZ_DEBUG) {
- $this->sqldebug[] = array($sql, number_format((microtime(true) - $starttime), 6), debug_backtrace(), $this->curlink);
- }
- $this->querynum++;
- return $query;
- }
- function affected_rows() {
- return $this->curlink->affected_rows;
- }
- function error() {
- return (($this->curlink) ? $this->curlink->error : mysqli_error());
- }
- function errno() {
- return intval(($this->curlink) ? $this->curlink->errno : mysqli_errno());
- }
- function result($query, $row = 0) {
- if(!$query || $query->num_rows == 0) {
- return null;
- }
- $query->data_seek($row);
- $assocs = $query->fetch_row();
- return $assocs[0];
- }
- function num_rows($query) {
- $query = $query ? $query->num_rows : 0;
- return $query;
- }
- function num_fields($query) {
- return $query ? $query->field_count : null;
- }
- function free_result($query) {
- return $query ? $query->free() : false;
- }
- function insert_id() {
- return ($id = $this->curlink->insert_id) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
- }
- function fetch_row($query) {
- $query = $query ? $query->fetch_row() : null;
- return $query;
- }
- function fetch_fields($query) {
- return $query ? $query->fetch_field() : null;
- }
- function version() {
- if(empty($this->version)) {
- $this->version = $this->curlink->server_info;
- }
- return $this->version;
- }
- function escape_string($str) {
- return $this->curlink->escape_string($str);
- }
- function close() {
- return $this->curlink->close();
- }
- function halt($message = '', $code = 0, $sql = '') {
- throw new DbException($message, $code, $sql);
- }
- }
- ?>
复制代码 2.修改source\class\discuz\discuz_application.php
查找
- $driver = 'db_driver_mysql';
复制代码 修改为
- $driver = function_exists('mysql_connect') ? 'db_driver_mysql' : 'db_driver_mysqli';
复制代码 保存,搞定。使用mysqli可能出现的问题(x2.5下)
本教程有无限星辰工作室独家整理发布,转载请注明出处,谢谢。
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