- <?php
- /*
- * Author 墨龙
- * Time 2010年12月2日 15:50:35
- */
- $db = new mysql($db_host,$db_user,$db_password,$db_table,$db_conn,$pre,$coding);
- class mysql{
- private $db_host;
- private $db_user;
- private $db_password;
- private $db_table;
- private $db_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 $pre; //数据库表前缀
- private $coding; //数据库编码,GBK,UTF8,gb2312
- function __construct($db_host,$db_user,$db_password,$db_table,$db_conn,$pre,$coding){
- $this->db_host = $db_host;
- $this->db_user = $db_user;
- $this->db_password = $db_password;
- $this->db_table = $db_table;
- $this->db_conn = $db_conn;
- $this->pre = $pre;
- $this->coding = $coding;
- $this->connect();
- }
- function connect(){
- $this->db_conn = @mysql_connect($this->db_host,$this->db_user,$this->db_password) or die($this->show_error("数据库链接错误,请检查数据库链接配置!"));
- if(!mysql_select_db($this->db_table,$this->db_conn)){
- echo "没有找到数据表:".$this->db_table;
- }
- mysql_select_db($this->db_table,$this->db_conn);
- & nbsp; $this->query("SET NAMES $this->coding");
- }
- /*执行SQL语句的函数*/
- function query($sql){
- if(emptyempty($sql)){
- $this->show_error("你的sql语句不能为空!");
- }else{
- $this->sql = $sql;
- }
- $result = mysql_query($this->sql,$this->db_conn);
- return $this->result = $result;
- }
- /*创建添加新的数据库*/
- public function create_database($database_name){
- $database=$database_name;
- $sqlDatabase = 'create database '.$database;
- return $this->query($sqlDatabase);
- }
- // 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){
- $this->show_error("sql语句错误!");
- }
- }else{
- return mysql_num_rows($this->result);
- }
- }
- /*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 "<br />";
- $i=1;
- while($row = $this->fetch_array($rs)){
- echo "$i $row[Database]";
- echo "<br />";
- &nb sp; $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->db_conn);
- $i=0;
- $cnt=mysql_num_rows($rsPtr);
- while($i<$cnt)
- {
- $rs[]=mysql_db_name($rsPtr,$i);
- $i++;
- }
- return print_r($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 "<br />";
- $i=1;
- while($row = $this->fetch_array($rs)){
- $columnName="Tables_in_".$database_name;
- echo "$i $row[$columnName]";
- echo "<br />";
- $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$row['字段名']
- public function fetch_ass()
- {
- return @mysql_fetch_assoc($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){
- $table = $this->fulltablename($table);
- $this->query("select * from $table");
- }
- public function select($table,$columnName,$condition){
- $table = $this->fulltablename($table);
- if(emptyempty($columnName)){
- $columnName = "*";
- }
- $this->query("SELECT $columnName FROM $table $condition");
- }
- //简化的insert
- function insert($table,$arr){
- $table = $this->fulltablename($table);
- $sql = "INSERT INTO $table ";
- if(!is_array($arr)){
- $this->show_error("请输入参数数组!");
- }else{
- $k = "";
- $v = "";
- foreach($arr as $key => $value){
- $k .= "`$key`,";
- $v .= "'".$value."',";
- }
- }
- $sql = $sql." (".substr($k,0,-1).") VALUES (".substr($v,0,-1).")";
- $this->query($sql);
- }
- //简化的update
- function update($table,< span class="vars">$arr,$where){
- $table = $this->fulltablename($table);
- $sql = "UPDATE $table SET ";
- if(!is_array($arr)){
- $this->show_error("请输入参数数组!");
- }else{
- foreach($arr as $key => $value){
- $sql .= " `".$key."` = '".$value."' ,";
- }
- }
- $sql = substr($sql,0,-1)." where ".$where;
- return $this->query($sql);
- }
- //简化的delete
- function delete($table,$where = ""){
- $table = $this->fulltablename($table);
- if(emptyempty($where)){
- $this->show_error("条件不能为空!");
- }else{
- $where = " where ".$where;
- }
- $sql = "DELETE FROM $table ".$where;
- //echo $sql;
- return $this->query($sql);
- }
- //取得上一步 INSERT 操作产生的 ID
- public function insert_id(){
- return mysql_insert_id();
- }
- //加上前缀的数据表
- public function fulltablename($table){
- return $table = $this->pre.$table;
- }
- //查询字段数量
- public function num_fields($table){
- $table = $this->fulltablename($table);
- $this->query("select * from $table");
- echo "<br />";
- echo< /span> "字段数:".$total = mysql_num_fields($this->result);
- echo "<pre>";
- for ($i=0; $i<$total; $i++){
- print_r(mysql_fetch_field($this->result,$i) );
- }
- echo "</pre>";
- echo "<br />";
- }
- //取得 MySQL 服务器信息
- public function mysql_server($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->$db_conn);
- }*/
- /*获得客户端真实的IP地址*/
- function getip(){
- if(getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
- {
- < /span>$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 show_error($str){
- echo "<script language='Javascript'> alert('".$str."');history.back(-1);</script>";
- }
- }
- ?>
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