[PHP]代码
-
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 = false; //测试阶段,显示所有错误,具有安全隐患,默认关闭
- private $is_error = false; //发现错误是否立即终止,默认true,建议不启用,因为当有问题时用户什么也看不到是很苦恼的
-
- /*构造函数*/
- public function __construct($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;
- $this->connect();
- }
-
- /*数据库连接*/
- public function connect() {
- if ($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 $this->coding");
- }
-
- /*数据库执行语句,可执行查询添加修改删除等任何sql语句*/
- public function query($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 $this->result;
- }
-
- /*创建添加新的数据库*/
- public function create_database($database_name) {
- $database = $database_name;
- $sqlDatabase = 'create database ' . $database;
- $this->query($sqlDatabase);
- }
-
- /*查询服务器所有数据库*/
- //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 $rs[] = mysql_db_name($rsPtr, $i);
- $i++;
- }
- return $rs;
- }
-
- /*查询数据库下所有的表*/
- public function show_tables($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++;
- }
- }
-
- /*
- mysql_fetch_row() array $row[0],$row[1],$row[2]
- mysql_fetch_array() array $row[0] 或 $row[id]
- mysql_fetch_assoc() array 用$row->content 字段大小写敏感
- mysql_fetch_object() object 用$row[id],$row[content] 字段大小写敏感
- */
-
- /*取得结果数据*/
- public function mysql_result_li() {
- return mysql_result($str);
- }
-
- /*取得记录集,获取数组-索引和关联,使用$row['content'] */
- public function fetch_array($resultt="") {
- if($resultt""){
- return mysql_fetch_array($resultt);
- }else{
- return mysql_fetch_array($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);
- }
- }
-
- /*取得上一步 INSERT 操作产生的 ID*/
- 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 "" . $message . "";
- echo "
";
- } else {
- echo "";
-
- echo "
";
- }
-
- //释放结果集
- public function free() {
- @ mysql_free_result($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; $i print_r(mysql_fetch_field($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();
-
- /*获得客户端真实的IP地址*/
- 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.dareng.com");
- exit();
- }
- }
-
- }
- ?>
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