<?php
class mysql {
OA信用盘架设q<319.135.503.1>
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 "<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->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*/
public 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 "<font color='red'>" . $message . "</font>";
        echo "<br />";
    } else {
        echo "<fieldset>";
        echo "<legend>错误信息提示:</legend><br />";
        echo "<div style='font-size:14px; clear:both; font-family:Verdana, Arial, Helvetica, sans-serif;'>";
        echo "<div style='height:20px; background:#000000; border:1px #000000 solid'>";
        echo "<font color='white'>错误号：12142</font>";
        echo "</div><br />";
        echo "错误原因：" . mysql_error() . "<br /><br />";
        echo "<div style='height:20px; background:#FF0000; border:1px #FF0000 solid'>";
        echo "<font color='white'>" . $message . "</font>";
        echo "</div>";
        echo "<font color='red'><pre>" . $sql . "</pre></font>";
        $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)) {
                    //默认的 mode 是 0777，意味着最大可能的访问权
                    die("upload files directory does not exist and creation failed");
                }
            }

            //建立txt日期文件
            if (!file_exists($file_path)) {

                //echo "建立日期文件";
                fopen($file_path, "w+");

                //首先要确定文件存在并且可写
                if (is_writable($file_path)) {
                    //使用添加模式打开$filename，文件指针将会在文件的开头
                    if (!$handle = fopen($file_path, 'a')) {
                        echo "不能打开文件 $filename";
                        exit;
                    }

                    //将$somecontent写入到我们打开的文件中。
                    if (!fwrite($handle, $error_content)) {
                        echo "不能写入到文件 $filename";
                        exit;
                    }

                    //echo "文件 $filename 写入成功";

                    echo "——错误记录被保存!";

                    //关闭文件
                    fclose($handle);
                } else {
                    echo "文件 $filename 不可写";
                }

            } else {
                //首先要确定文件存在并且可写
                if (is_writable($file_path)) {
                    //使用添加模式打开$filename，文件指针将会在文件的开头
                    if (!$handle = fopen($file_path, 'a')) {
                        echo "不能打开文件 $filename";
                        exit;
                    }

                    //将$somecontent写入到我们打开的文件中。
                    if (!fwrite($handle, $error_content)) {
                        echo "不能写入到文件 $filename";
                        exit;
                    }

                    //echo "文件 $filename 写入成功";
                    echo "——错误记录被保存!";

                    //关闭文件
                    fclose($handle);
                } else {
                    echo "文件 $filename 不可写";
                }
            }

        }
        echo "<br />";
        if ($this->is_error) {
            exit;
        }
    }
    echo "</div>";
    echo "</fieldset>";

    echo "<br />";
}

//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 "<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->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();
    }
}

}
?>