Discuz!X2-X2.5 Mysqli扩展支持案例
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['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;
}
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);
}
}
放
class db_mysql上面
查找
$class = 'db_mysql';
改为
$class = 'db_mysqli';
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
/**
* (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['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;
}
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 $assocs;
}
function num_rows($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);
}
}
?>2.修改source\class\discuz\discuz_application.php
查找
$driver = 'db_driver_mysql';修改为
$driver = function_exists('mysql_connect') ? 'db_driver_mysql' : 'db_driver_mysqli';保存，搞定。使用mysqli可能出现的问题（x2.5下）
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