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// +----------------------------------------------------------------------
// | Author: 老掌
// +----------------------------------------------------------------------
// | 数据库操作类
// +----------------------------------------------------------------------
/**
* 数据库操作类
* 数据库操作封装
* @author wangweichen
*/
/*
connect($dbhost, $dbuser, $dbpw, $dbname = '', $charset)
select_database('user')
set_mysql_charset('utf8')
fetch_array($res)
query($sql)
affected_rows()
error()
errno()
result($res,0)
num_rows($res)
num_fields($res)
free_result($res)
insert_id()
fetchRow($res)
fetch_fields($res)
version()
ping()
escape_string()
close()
error_msg('提示信息')
selectlimit($sql,$num,$start)
getone($sql,true)
getrow($sql)
getall($sql)
*/
// namespace Org\Util;
class Mysqli{
var $link_id = NULL;
var $settings = array();
var $queryCount = 0;
var $queryTime = '';
var $queryLog = array();
var $max_cache_time = 0; // 最大的缓存时间，以秒为单位
var $cache_data_dir = 'temp/query_caches/'; //缓存位置
var $root_path = '';
var $error_message = array(); //报错信息
var $platform = ''; //操作系统
var $version = ''; //PHP版本号
var $dbhash = '';
var $starttime = 0; //连接时间
var $timeline = 0;
var $timezone = 0;
var $mysql_config_cache_file_time = 0;
/*
* 构造函数
* $dbhost : 主机地址
* $dbuser ：用户名
* $dbpw ：密码
* $dbname ：数据库名
* $charset ：编码
* $pconnect
* $quiet ：
*/
function __construct($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'gbk', $pconnect = 0, $quiet = 0) {
$this->cls_mysql($dbhost, $dbuser, $dbpw, $dbname, $charset, $pconnect, $quiet);
}
function cls_mysql($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'gbk', $pconnect = 0, $quiet = 0) {
if (defined('EC_CHARSET')) {
$charset = strtolower(str_replace('-', '', EC_CHARSET));
}
if (defined('ROOT_PATH') && !$this->root_path) {
$this->root_path = ROOT_PATH;
}
if ($quiet) {
$this->connect($dbhost, $dbuser, $dbpw, $dbname, $charset, $pconnect, $quiet);
} else {
$this->settings = array(
'dbhost' => $dbhost,
'dbuser' => $dbuser,
'dbpw' => $dbpw,
'dbname' => $dbname,
'charset' => $charset,
'pconnect' => $pconnect
);
}
}
function connect($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'utf8', $pconnect = 0, $quiet = 0) {
if ($pconnect) {
if (!($this->link_id = @mysql_pconnect($dbhost, $dbuser, $dbpw))) {
if (!$quiet) {
$this->ErrorMsg("Can't pConnect MySQL Server($dbhost)!");
}
return false;
}
} else {
if (PHP_VERSION >= '4.2') {
$this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw, true);
} else {
$this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw);
mt_srand((double) microtime() * 1000000); // 对 PHP 4.2 以下的版本进行随机数函数的初始化工作
}
if (!$this->link_id) {
if (!$quiet) {
$this->ErrorMsg("Can't Connect MySQL Server($dbhost)!");
}
return false;
}
}
$this->dbhash = md5($this->root_path . $dbhost . $dbuser . $dbpw . $dbname);
$this->version = mysql_get_server_info($this->link_id);
/* 如果mysql 版本是 4.1+ 以上，需要对字符集进行初始化 */
if ($this->version > '4.1') {
if ($charset != 'latin1') {
mysql_query("SET character_set_connection=$charset, character_set_results=$charset, character_set_client=binary", $this->link_id);
}
if ($this->version > '5.0.1') {
mysql_query("SET sql_mode=''", $this->link_id);
}
}
$sqlcache_config_file = $this->root_path . $this->cache_data_dir . 'sqlcache_config_file_' . $this->dbhash . '.php';
@include($sqlcache_config_file);
$this->starttime = time();
if ($this->max_cache_time && $this->starttime > $this->mysql_config_cache_file_time + $this->max_cache_time) {
if ($dbhost != '.') {
$result = mysql_query("SHOW VARIABLES LIKE 'basedir'", $this->link_id);
$row = mysql_fetch_assoc($result);
if (!empty($row['Value']{
1}) && $row['Value']{
1} == ':' && !empty($row['Value']{
2}) && $row['Value']{
2} == "\\") {
$this->platform = 'WINDOWS';
} else {
$this->platform = 'OTHER';
}
} else {
$this->platform = 'WINDOWS';
}
if ($this->platform == 'OTHER' &&
($dbhost != '.' && strtolower($dbhost) != 'localhost:3306' && $dbhost != '127.0.0.1:3306') ||
(PHP_VERSION >= '5.1' && date_default_timezone_get() == 'UTC')) {
$result = mysql_query("SELECT UNIX_TIMESTAMP() AS timeline, UNIX_TIMESTAMP('" . date('Y-m-d H:i:s', $this->starttime) . "') AS timezone", $this->link_id);
$row = mysql_fetch_assoc($result);
if ($dbhost != '.' && strtolower($dbhost) != 'localhost:3306' && $dbhost != '127.0.0.1:3306') {
$this->timeline = $this->starttime - $row['timeline'];
}
if (PHP_VERSION >= '5.1' && date_default_timezone_get() == 'UTC') {
$this->timezone = $this->starttime - $row['timezone'];
}
}
$content = '<' . "?php\r\n" .
'$this->mysql_config_cache_file_time = ' . $this->starttime . ";\r\n" .
'$this->timeline = ' . $this->timeline . ";\r\n" .
'$this->timezone = ' . $this->timezone . ";\r\n" .
'$this->platform = ' . "'" . $this->platform . "';\r\n?" . '>';
@file_put_contents($sqlcache_config_file, $content);
}
/* 选择数据库 */
if ($dbname) {
if (mysql_select_db($dbname, $this->link_id) === false) {
if (!$quiet) {
$this->ErrorMsg("Can't select MySQL database($dbname)!");
}
return false;
} else {
return true;
}
} else {
return true;
}
}
/*
* 选择数据库
* 数据库名称
*/
function select_database($dbname) {
return mysql_select_db($dbname, $this->link_id);
}
/*
* 设计编码
*/
function set_mysql_charset($charset) {
/* 如果mysql 版本是 4.1+ 以上，需要对字符集进行初始化 */
if ($this->version > '4.1') {
if (in_array(strtolower($charset), array('gbk', 'big5', 'utf-8', 'utf8'))) {
$charset = str_replace('-', '', $charset);
}
if ($charset != 'latin1') {
mysql_query("SET character_set_connection=$charset, character_set_results=$charset, character_set_client=binary", $this->link_id);
}
}
}
/*
* 从结果集中取得一行数字或关联数组
* $query ：结果集
* $result_type ：返回哪种结果
MYSQL_ASSOC 关联数组
MYSQL_NUM 数字数组
MYSQL_BOTH 两者（默认）
*/
function fetch_array($query, $result_type = MYSQL_BOTH) {
return mysql_fetch_array($query, $result_type);
}
/*
* 执行一条SQL语句
* $sql ：将要执行的 sql 语句
*/
function query($sql, $type = '') {
if ($this->link_id === NULL) {
$this->connect($this->settings['dbhost'], $this->settings['dbuser'], $this->settings['dbpw'], $this->settings['dbname'], $this->settings['charset'], $this->settings['pconnect']);
$this->settings = array();
}
if ($this->queryCount++ <= 99) {
$this->queryLog[] = $sql;
}
if ($this->queryTime == '') {
if (PHP_VERSION >= '5.0.0') {
$this->queryTime = microtime(true);
} else {
$this->queryTime = microtime();
}
}
/* 当当前的时间大于类初始化时间的时候，自动执行 ping 这个自动重新连接操作 */
if (PHP_VERSION >= '4.3' && time() > $this->starttime + 1) {
mysql_ping($this->link_id);
}
if (!($query = mysql_query($sql, $this->link_id)) && $type != 'SILENT') {
$this->error_message[]['message'] = 'MySQL Query Error';
$this->error_message[]['sql'] = $sql;
$this->error_message[]['error'] = mysql_error($this->link_id);
$this->error_message[]['errno'] = mysql_errno($this->link_id);
$this->ErrorMsg();
return false;
}
if (defined('DEBUG_MODE') && (DEBUG_MODE & 8) == 8) {
$logfilename = $this->root_path . DATA_DIR . '/mysql_query_' . $this->dbhash . '_' . date('Y_m_d') . '.log';
$str = $sql . "\n\n";
if (PHP_VERSION >= '5.0') {
file_put_contents($logfilename, $str, FILE_APPEND);
} else {
$fp = @fopen($logfilename, 'ab+');
if ($fp) {
fwrite($fp, $str);
fclose($fp);
}
}
}
return $query;
}
/*
* 返回前一次 MySQL 操作所影响的记录行数。
*/
function affected_rows() {
return mysql_affected_rows($this->link_id);
}
/*
* 返回上一个 SQL 操作产生的文本错误信息
*/
function error() {
return mysql_error($this->link_id);
}
/*
* 返回上一个 SQL 操作产生的错误信息的数字编码
*/
function errno() {
return mysql_errno($this->link_id);
}
/*
* 返回结果集中一个字段的值
* $query ：结果集
* $row ：行号。默认从0行开始
* $field ：获取哪个字段。默认指定行第一个字段
*/
function result($query, $row ,$field) {
return @mysql_result($query, $row, $field);
}
/*
* 返回结果集中行的数目
* $query ：结果集
*/
function num_rows($query) {
return mysql_num_rows($query);
}
/*
* 返回结果集中字段的数目
* $query ：结果集
*/
function num_fields($query) {
return mysql_num_fields($query);
}
/*
* 释放结果内存
* $query ：结果集
*/
function free_result($query){
return mysql_free_result($query);
}
/*
* 返回上一个 SQL 操作产生的ID
*/
function insert_id() {
return mysql_insert_id($this->link_id);
}
/*
* 从结果集中取得一行做为关联数组返回
* $query ：结果集
*/
function fetchRow($query) {
return mysql_fetch_assoc($query);
}
/*
* 从结果集中取得列信息做为对象返回
*/
function fetch_fields($query) {
return mysql_fetch_field($query);
}
/*
* 返回 PHP 版本号
*/
function version() {
return $this->version;
}
/*
* 用于空闲很久的脚本来检查服务器是否关闭了连接
*/
function ping() {
if (PHP_VERSION >= '4.3') {
return mysql_ping($this->link_id);
} else {
return false;
}
}
/*
* 转义 SQL 语句中使用的字符串中的特殊字符
*/
function escape_string($unescaped_string){
if (PHP_VERSION >= '4.3') {
return mysql_real_escape_string($unescaped_string);
} else {
return mysql_escape_string($unescaped_string);
}
}
/*
* 关闭连接
*/
function close() {
return mysql_close($this->link_id);
}
/*
* 输出错误信息
* $message ：提示信息
*/
function error_msg($message = ''){
if($message){
echo "<b>出错了~</b> $message\n\n<br /><br />";
}else{
echo "<b>MySQL server error report:</b>";
print_r($this->error_message);
}
exit;
}
/*
* 拼接limit
* $sql ：sql语句
* $num ：数量
* $start ：起始位置
*/
function selectlimit($sql, $num ,$start = 0){
if($start){
$sql .= ' LIMIT ' . $start;
}else{
$sql .= ' LIMIT ' . $start . ',' . $num;
}
}
/*
* 返回结果集中的第一条数据,一般用于查询某条件的某个字段值
* ps:select uid from user where username = '三';结果直接是 uid值
* $sql ：要执行的 SQL 语句
* $limited ：是否查询一条
*/
function getone($sql, $limited = false) {
if ($limited == true) {
$sql = trim($sql . ' LIMIT 1');
}
$res = $this->query($sql);
if ($res !== false) {
$row = mysql_fetch_row($res);
if ($row !== false) {
return $row[0];
} else {
return '';
}
} else {
return false;
}
}
/*
* 从结果集中取出一行做为关联数组
*/
function getrow($sql, $limited = false) {
if ($limited == true) {
$sql = trim($sql . ' LIMIT 1');
}
$res = $this->query($sql);
if ($res !== false) {
return mysql_fetch_assoc($res);
} else {
return false;
}
}
/*
* 返回结果集所有内容
*/
function getall($sql) {
$res = $this->query($sql);
if ($res !== false) {
$arr = array();
while ($row = mysql_fetch_assoc($res)) {
$arr[] = $row;
}
return $arr;
} else {
return false;
}
}
}