- /*
- * filename:mysql数据库连接类
- * edit bbs.it-home.org
- */
- 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 $is_error = false; //发现错误是否立即终止,默认true,建议不启用,因为当有问题时用户什么也看不到是很苦恼的
- /*构造函数*/
- public function __construct($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{
- //即时链接
- $this->conn=mysql_connect($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(){
- $rs=$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 $rs;
- }
- /*查询数据库下所有的表*/
- function show_tables($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()
- {
- 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)
- {
- if($columnName==""){
- $columnName="*";
- }
- $this->query("SELECT $columnName FROM $table $condition");
- }
- //简化删除del
- public function delete($table,$condition){
- $this->query("DELETE FROM $table WHERE $condition");
- }
- //简化插入insert
- public function insert($table,$columnName,$value){
- $this->query("INSERT INTO $table ($columnName) VALUES ($value)");
- }
- //简化修改update
- public function update($table,$mod_content,$condition){
- $this->query("UPDATE $table SET $mod_content WHERE $condition");
- }
- /*取得上一步 INSERT 操作产生的 ID*/
- public function insert_id(){
- return mysql_insert_id();
- }
- //指向确定的一条数据记录
- public function db_data_seek($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; $i<$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();
- /*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);
- }
- }
- ?>
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