class mysql {

private $db_host; //数据库主机

private $db_user; //数据库用户名

private $db_pwd; //数据库用户名密码

private $db_database; //数据库名

private $conn; //数据库连接标识;

private $result; //执行query命令的结果资源标识

private $sql; //sql执行语句

private $row; //返回的条目数

private $coding; //数据库编码，GBK,UTF8,gb2312

private $bulletin = true; //是否开启错误记录

private $show_error = true;

//测试阶段，显示所有错误,具有安全隐患,默认关闭

private $is_error = false;

//发现错误是否立即终止,默认true,建议不启用，因为当有问题时用户什么也看不到是很苦恼的

public function __construct($db_host, $db_user,

$db_pwd, $db_database, $conn, $coding) {

$this->db_host =

$db_host;

$this->db_user =

$db_user;

$this->db_pwd =

$db_pwd;

$this->db_database

= $db_database;

$this->conn =

$conn;

$this->coding =

$coding;

$this->connect();

}

public function connect() {

if ($this->conn

== "pconn") {

//永久链接

$this->conn

= mysql_pconnect($this->db_host,

$this->db_user, $this->db_pwd);

} else {

//即使链接

$this->conn

= mysql_connect($this->db_host,

$this->db_user, $this->db_pwd);

}

if

(!mysql_select_db($this->db_database,

$this->conn)) {

if

($this->show_error) {

$this->show_error("数据库不可用：",

$this->db_database);

}

}

mysql_query("SET NAMES

$this->coding");

}

public function query($sql) {

if ($sql == "") {

$this->show_error("SQL语句错误：",

"SQL查询语句为空");

}

$this->sql =

$sql;

$result

= mysql_query($this->sql,

$this->conn);

if

(!$result) {

//调试中使用，sql语句出错时会自动打印出来

if

($this->show_error) {

$this->show_error("错误SQL语句：",

$this->sql);

}

} else {

$this->result

= $result;

}

return

$this->result;

}

public function create_database($database_name)

{

$database =

$database_name;

$sqlDatabase = 'create database

' . $database;

$this->query($sqlDatabase);

}

//将系统数据库与用户数据库分开，更直观的显示？

public function show_databases() {

$this->query("show

databases");

echo "现有数据库：" . $amount =

$this->db_num_rows($rs);

echo "

/>";

$i = 1;

while ($row =

$this->fetch_array($rs)) {

echo "$i

$row[Database]";

echo

"
";

$i++;

}

}

//以数组形式返回主机中所有数据库名

public function databases() {

$rsPtr =

mysql_list_dbs($this->conn);

$i = 0;

$cnt =

mysql_num_rows($rsPtr);

while ($i <

$cnt) {

$rs[] =

mysql_db_name($rsPtr, $i);

$i++;

}

return $rs;

}

public function show_tables($database_name)

{

$this->query("show

tables");

echo "现有数据库：" . $amount =

$this->db_num_rows($rs);

echo "

/>";

$i = 1;

while ($row =

$this->fetch_array($rs)) {

$columnName =

"Tables_in_" . $database_name;

echo "$i

$row[$columnName]";

echo

"
";

$i++;

}

}

public function mysql_result_li() {

return

mysql_result($str);

}

public function fetch_array() {

return

mysql_fetch_array($this->result);

}

//获取关联数组,使用$row['字段名']

public function fetch_assoc() {

return

mysql_fetch_assoc($this->result);

}

//获取数字索引数组,使用$row[0],$row[1],$row[2]

public function fetch_row() {

return

mysql_fetch_row($this->result);

}

//获取对象数组,使用$row->content

public function fetch_Object() {

return

mysql_fetch_object($this->result);

}

//简化查询select

public function findall($table) {

$this->query("SELECT

* FROM $table");

}

//简化查询select

public function select($table, $columnName = "*",

$condition = '', $debug = '') {

$condition = $condition ? '

Where ' . $condition : NULL;

if ($debug) {

echo "SELECT

$columnName FROM $table $condition";

} else {

$this->query("SELECT

$columnName FROM $table $condition");

}

}

//简化删除del

public function delete($table, $condition, $url =

'') {

if

($this->query("DELETE FROM $table WHERE

$condition")) {

if (!empty

($url))

$this->Get_admin_msg($url,

'删除成功！');

}

}

//简化插入insert

public function insert($table, $columnName,

$value, $url = '') {

if

($this->query("INSERT INTO $table ($columnName)

VALUES ($value)")) {

if (!empty

($url))

$this->Get_admin_msg($url,

'添加成功！');

}

}

//简化修改update

public function update($table, $mod_content,

$condition, $url = '') {

//echo "UPDATE $table SET

$mod_content WHERE $condition"; exit();

if

($this->query("UPDATE $table SET $mod_content WHERE

$condition")) {

if (!empty

($url))

$this->Get_admin_msg($url);

}

}

public function insert_id() {

return mysql_insert_id();

}

//指向确定的一条数据记录

public function db_data_seek($id) {

if ($id > 0)

{

$id = $id

-1;

}

if (!@

mysql_data_seek($this->result, $id)) {

$this->show_error("SQL语句有误：",

"指定的数据为空");

}

return

$this->result;

}

//

根据select查询结果计算结果集条数

public function db_num_rows() {

if

($this->result == null) {

if

($this->show_error) {

$this->show_error("SQL语句错误",

"暂时为空，没有任何内容！");

}

} else {

return

mysql_num_rows($this->result);

}

}

//

根据insert,update,delete执行结果取得影响行数

public function db_affected_rows() {

return

mysql_affected_rows();

}

//输出显示sql语句

public function show_error($message = "", $sql =

"") {

if (!$sql) {

echo

"" . $message .

"";

echo

"
";

} else {

echo

"

";

echo

"错误信息提示:

/>";

echo

"

" .

";

echo

"

";

echo

"
";

}

//释放结果集

public function free() {

@

mysql_free_result($this->result);

}

//数据库选择

public function select_db($db_database) {

return

mysql_select_db($db_database);

}

//查询字段数量

public function num_fields($table_name) {

//return

mysql_num_fields($this->result);

$this->query("select

* from $table_name");

echo "

/>";

echo "字段数：" . $total =

mysql_num_fields($this->result);

echo

"

";

for ($i = 0; $i

< $total; $i++) {

print_r(mysql_fetch_field($this->result,

$i));

}

echo

"

";

echo "

/>";

}

//取得 MySQL

服务器信息

public function mysql_server($num = '') {

switch ($num) {

case 1

:

return

mysql_get_server_info(); //MySQL 服务器信息

break;

case

2 :

return

mysql_get_host_info(); //取得 MySQL 主机信息

break;

case

3 :

return

mysql_get_client_info(); //取得 MySQL 客户端信息

break;

case

4 :

return

mysql_get_proto_info(); //取得 MySQL 协议信息

break;

default

:

return

mysql_get_client_info(); //默认取得mysql版本信息

}

}

//析构函数，自动关闭数据库,垃圾回收机制

public function __destruct() {

if (!empty

($this->result)) {

$this->free();

}

mysql_close($this->conn);

} //function __destruct();

function getip() {

if (getenv("HTTP_CLIENT_IP")

&&

strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) {

$ip =

getenv("HTTP_CLIENT_IP");

} else

if

(getenv("HTTP_X_FORWARDED_FOR") &&

strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) {

$ip

= getenv("HTTP_X_FORWARDED_FOR");

} else

if

(getenv("REMOTE_ADDR") &&

strcasecmp(getenv("REMOTE_ADDR"), "unknown")) {

$ip

= getenv("REMOTE_ADDR");

}

else

if

(isset ($_SERVER['REMOTE_ADDR']) &&

$_SERVER['REMOTE_ADDR'] &&

strcasecmp($_SERVER['REMOTE_ADDR'], "unknown")) {

$ip

= $_SERVER['REMOTE_ADDR'];

}

else {

$ip

= "unknown";

}

return ($ip);

}

function inject_check($sql_str) { //防止注入

$check =

eregi('select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile',

$sql_str);

if ($check) {

echo

"输入非法注入内容！";

exit

();

} else {

return

$sql_str;

}

}

function checkurl() { //检查来路

if

(preg_replace("/https?:\/\/([^\:\/]+).*/i", "\\1", $_SERVER['HTTP_REFERER']) !==

preg_replace("/([^\:]+).*/", "\\1", $_SERVER['HTTP_HOST'])) {

header("Location:

http://www.maidq.com");

exit();

}

}

}

?>