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mysql操作类_PHP教程

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Jul 13, 2016 pm 05:49 PM

classhostmysqlphpprivate主操作資料庫機類別

/**
* 数据库操作类
* 2011/8/25
* kcj
* */
class MyDB {
    private $db_host;        //数据库主机名
    private $db_user;        //数据库用户名
    private $db_pwd;         //数据库密码
    private $db_database;    //数据库名
    private $conn;           //连接标识
    private $result;         //执行query命令的结果资源标识
    private $row;            //返回的条目数
    private $sql;            //sql执行语句
    private $coding;         //数据库编码
    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 $is_error=false;      //发现错误是否立即终止,默认true,建议不启用，因为当有问题时用户什么也看不到是很苦恼的
    //构造函数
     function __construct($db_host,$db_user,$db_pwd,$db_database,$conn,$doding){
           $this->db_host=$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"){
            //永久连接
            $this->conn=mysql_pconnect($this->db_host,$this->db_user,$this->db_pwd);
        }else{
            //即使连接
            $this->conn=mysql_connect($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);
            }
        }
     }

     //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语句为空");
        }
        $this->sql=$sql;
        $result=mysql_query($this->sql,$this->conn);
        if(!$result){
            if($this->show_error){
                $this->show_error("错误sql语句：",$this->sql);
            }
        }else {
            $this->result;
        }
        return $result;
     }
     //创建添加新的数据库
     public function create_database($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分开，更直观的显示
     public function show_database(){
        $this->query("show databases");
        echo "现在有的数据库：".$amount=$this->db_num_rows($rs);
        echo "
";
        $i=1;
        while ($row=$this->fetch_array($rs)){
            echo "$i $row[Database]";
            echo "
";
            $i++;
        }
     }
     //以数组的形式返回主机中所有的数据库名
     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 "
";
            $i++;
        }
     }
     // 取得结果集
     public function fetch_array($resultt=""){
        if($resultt!=""){
            return mysql_fetch_array($resultt);
        }else {
            return mysql_fetch_array($this->result);
        }
     }
     //取得结果数 $row['content']
     public function mysql_result_li(){
        return mysql_result($str);
     }
     //获取关联数组 $row['字段名']
     public function fetch_assoc(){
        return mysql_fetch_assoc($this->result);
     }
     //获取数字索引数组 $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 $condition")){
            if(!emptyempty($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 ($value)")){
            if(!emptyempty($url)){
                $this->Get_admin_msg($url,'添加成功');
            }
          }

     }
     //简化更新update
     public function update($table,$mod_content,$condition,$url=''){
        if($this->query("update $table set $mod_content where $condition")){
            if(!emptyempty($url)){
                $this->Get_admin_msg($url);
            }
        }
     }
     //取得上一步insert操作的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执行的结果驱动影响行数
     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 "错误号：12142";
echo "

";
echo "错误原因：" . mysql_error() . "

";
echo "

";
echo "" . $message . "";
echo "

";
echo "

" . $sql . "

";
            $ip = $this->getip();
            if ($this->bulletin) {
                $time = date("Y-m-d H:i:s");
                $message = $message . "\r\n$this->sql" . "\r\n客户IP:$ip" . "\r\n时间 :$time" . "\r\n\r\n";

                $server_date = date("Y-m-d");
                $filename = $server_date . ".txt";
                $file_path = "error/" . $filename;
                $error_content = $message;
                //$error_content="错误的数据库，不可以链接";
                $file = "error"; //设置文件保存目录
          //建立文件夹
if(!file_exists($file)){
    if(!mkdir($file,0777)){
        die("upload files directory does not exist and creation failed");
    }
}
    //建立txt日期文件
    if(!file_exists($file_path)){
        fopen($file_path,"w+");
        if(is_writable($file_path)){
            if(!$handle=fopen($file_path,'a')){
                echo "不能打开文件 $filename";
                exit;
            }
            if(!fwrite($handle,$error_content)){
                echo "不能写到文件 $filename";
                exit;
            }
            echo "——错误记录被保存!";
          fclose($handle);

        }else {
            echo "文件 $filename 不可写";
        }
    }else {
        if(is_writable($file_path)){
            if(!$handle=fopen($file_path,'a')){
                 echo "不能打开文件 $filename";
                 exit;
            }
            if(!fwrite($handle,$error_content)){
                echo "不能写入文件 $filename";
                exit;
            }
            echo "——错误记录被保存!";
              fclose($handle);
        }else {
            echo "文件 $filename 不可写";
        }
    }
        }
     echo "
";
     if ($this->is_error) {
          exit;
            }
        }
     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){
    $this->query("select * from $table_name");
    echo "
";
    echo "字段数：".$total=mysql_num_fields($this->result);
    for ($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 ($num){
          case 1:
            return mysql_get_server_info();
            break;
            case 2:
            return mysql_get_host_info();
            break;
            case 3:
            return mysql_get_client_info();
            break;
            case 4:
            return mysql_get_proto_info();
            break;
            default:
                return mysql_get_client_info();
    }
   }
public function __destruct(){
    if(!emptyempty($this->result)){
        $this->free();
    }
    mysql_close($this->conn);
}
//获得客户端真实的ID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);
   }

}

?>
/**
* 数据库操作类
* 2011/8/25
* kcj
* */
class MyDB {
private $db_host;        //数据库主机名
private $db_user;        //数据库用户名
private $db_pwd;         //数据库密码
private $db_database;    //数据库名
private $conn;           //连接标识
private $result;         //执行query命令的结果资源标识
private $row;            //返回的条目数
private $sql;            //sql执行语句
private $coding;         //数据库编码
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 $is_error=false;      //发现错误是否立即终止,默认true,建议不启用，因为当有问题时用户什么也看不到是很苦恼的
//构造函数
function __construct($db_host,$db_user,$db_pwd,$db_database,$conn,$doding){
        $this->db_host=$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"){
  //永久连接
  $this->conn=mysql_pconnect($this->db_host,$this->db_user,$this->db_pwd);
}else{
  //即使连接
  $this->conn=mysql_connect($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);
  }
}
}

//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语句为空");
}
$this->sql=$sql;
$result=mysql_query($this->sql,$this->conn);
if(!$result){
  if($this->show_error){
   $this->show_error("错误sql语句：",$this->sql);
  }
}else {
  $this->result;
}
return $result;
}
//创建添加新的数据库
public function create_database($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分开，更直观的显示
public function show_database(){
$this->query("show databases");
echo "现在有的数据库：".$amount=$this->db_num_rows($rs);
echo "
";
$i=1;
while ($row=$this->fetch_array($rs)){
  echo "$i $row[Database]";
  echo "
";
  $i++;
}
}
//以数组的形式返回主机中所有的数据库名
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 "
";
  $i++;
}
}
// 取得结果集
public function fetch_array($resultt=""){
if($resultt!=""){
  return mysql_fetch_array($resultt);
}else {
  return mysql_fetch_array($this->result);
}
}
//取得结果数 $row['content']
public function mysql_result_li(){
return mysql_result($str);
}
//获取关联数组 $row['字段名']
public function fetch_assoc(){
return mysql_fetch_assoc($this->result);
}
//获取数字索引数组 $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');
   }
   }

}
//简化更新update
public function update($table,$mod_content,$condition,$url=''){
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执行的结果驱动影响行数
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 "错误号：12142";
echo "

";
echo "错误原因：" . mysql_error() . "

";
echo "

";
echo "" . $message . "";
echo "

";
echo "

" . $sql . "

";
            $ip = $this->getip();
            if ($this->bulletin) {
                $time = date("Y-m-d H:i:s");
                $message = $message . "\r\n$this->sql" . "\r\n客户IP:$ip" . "\r\n时间 :$time" . "\r\n\r\n";

                $server_date = date("Y-m-d");
                $filename = $server_date . ".txt";
                $file_path = "error/" . $filename;
                $error_content = $message;
                //$error_content="错误的数据库，不可以链接";
                $file = "error"; //设置文件保存目录
          //建立文件夹
if(!file_exists($file)){
if(!mkdir($file,0777)){
  die("upload files directory does not exist and creation failed");
}
}
    //建立txt日期文件 www.2cto.com
    if(!file_exists($file_path)){
    fopen($file_path,"w+");
    if(is_writable($file_path)){
      if(!$handle=fopen($file_path,'a')){
       echo "不能打开文件 $filename";
       exit;
      }
      if(!fwrite($handle,$error_content)){
       echo "不能写到文件 $filename";
       exit;
      }
      echo "——错误记录被保存!";
          fclose($handle);

    }else {
      echo "文件 $filename 不可写";
    }
    }else {
    if(is_writable($file_path)){
      if(!$handle=fopen($file_path,'a')){
        echo "不能打开文件 $filename";
                 exit;
      }
      if(!fwrite($handle,$error_content)){
       echo "不能写入文件 $filename";
       exit;
      }
      echo "——错误记录被保存!";
              fclose($handle);
    }else {
      echo "文件 $filename 不可写";
    }
    }
}
echo "
";
if ($this->is_error) {
   exit;
            }
        }
     echo "

";
echo "

摘自 chaojie2009的专栏

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