<?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); $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 />"; $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($table,$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 $table"); echo "<br />"; echo "字段数：".$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")) { $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>"; } } ?>
