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<?php 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 = 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‘ ])) { exit (); } } } ?> |
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原文地址:http://www.cnblogs.com/roam/p/5635287.html