PHP+MYSQL数据库操作类【百科全说】

操作方法

01

<?phpclass 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,gb2312private $bulletin = true; //是否开启错误记录private $show_error = true; //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 $rs;}/*查询数据库下所有的表*/function show_tables($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(){ 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->contentpublic function fetch_Object(){return mysql_fetch_object($this->result);}//简化查询selectpublic function findall($table){$this->query("SELECT * FROM $table");}//简化查询selectpublic function select($table,$columnName,$condition){if($columnName==""){$columnName="*";}$this->query("SELECT $columnName FROM $table where $condition");}//简化删除delpublic function delete($table,$condition){$this->query("DELETE FROM $table WHERE $condition");}//简化插入insertpublic function insert($table,$columnName,$value){$this->query("INSERT INTO $table ($columnName) VALUES ($value)");}//简化修改updatepublic function update($table,$mod_content,$condition){$this->query("UPDATE $table SET $mod_content WHERE $condition");}/*取得上一步 INSERT 操作产生的 ID*/public function insert_id(){return mysql_insert_id();}//指向确定的一条数据记录public function db_data_seek($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);}}?>

PHP+MYSQL数据库操作类

操作方法

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