php操作mysql的類

[PHP]代碼 class mysql { private $db_host; //資料庫主機 private $db_user; //資料庫使用者名稱 private $db_pwd; //資料庫使用者名稱密碼 private $db_database; //資料庫名 private $conn; //資料庫連接標識; private $result; //執行query命令的結果資源標識 private $sql; //sql執行語句 private $row; //返回的條目數 private $coding; //資料庫編碼，GBK,UTF8,gb2312 private $bulletin = true; //是否開啟錯誤記錄 private $show_error = false; //測試階段，顯示所有錯誤,具有安全隱患,預設關閉 private $is_error = false; //發現錯誤是否立即終止,預設true,建議不啟用，因為當有問題時使用者什麼也看不到是很苦惱的 /*建構函式*/ public function __construct($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; $this->connect(); } /*資料庫連接*/ public function connect() { if ($this->conn == "pconn") { //永久連結 $this->conn = mysql_pconnect($this->db_host, $this->db_user, $this->db_pwd); } else { //即使連結 $this->conn = mysql_connect($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("資料庫不可用：", $this->db_database); } } mysql_query("SET NAMES $this->coding"); } /*資料庫執行語句，可執行查詢添加修改刪除等任何sql語句*/ public function query($sql) { if ($sql == "") { $this->show_error("SQL語句錯誤：", "SQL查詢語句為空白"); } $this->sql = $sql; $result = mysql_query($this->sql, $this->conn); if (!$result) { //調試中使用，sql語句出錯時會自動列印出來 if ($this->show_error) { $this->show_error("錯誤SQL語句：", $this->sql); } } else { $this->result = $result; } return $this->result; } /*建立添加新的資料庫*/ public function create_database($database_name) { $database = $database_name; $sqlDatabase = 'create database ' . $database; $this->query($sqlDatabase); } /*查詢服務器所有資料庫*/ //將系統資料庫與使用者資料庫分開，更直觀的顯示？ public function show_databases() { $this->query("show databases"); echo "現有資料庫：" . $amount = $this->db_num_rows($rs); echo " "; $i = 1; while ($row = $this->fetch_array($rs)) { echo "$i $row[Database]"; echo " "; $i++; } } //以數組形式返回主機中所有資料庫名 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 $rs; } /*查詢資料庫下所有的表*/ public function show_tables($database_name) { $this->query("show tables"); echo "現有資料庫：" . $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++; } } /* 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 欄位大小寫敏感 mysql_fetch_object() object 用$row[id],$row[content] 欄位大小寫敏感 */ /*取得結果資料*/ public function mysql_result_li() { return mysql_result($str); } /*取得記錄集,擷取數組-索引和關聯,使用$row['content'] */ public function fetch_array($resultt="") { if($resultt<>""){ return mysql_fetch_array($resultt); }else{ return mysql_fetch_array($this->result); } } //擷取關聯陣列,使用$row['欄位名'] public function fetch_assoc() { return mysql_fetch_assoc($this->result); } //擷取數字索引數組,使用$row[0],$row[1],$row[2] public function fetch_row() { return mysql_fetch_row($this->result); } //擷取對象數組,使用$row->content public function fetch_Object() { return mysql_fetch_object($this->result); } //簡化查詢select public function findall($table) { $this->query("SELECT * FROM $table"); } //簡化查詢select public function select($table, $columnName = "*", $condition = '', $debug = '') { $condition = $condition ? ' Where ' . $condition : NULL; if ($debug) { echo "SELECT $columnName FROM $table $condition"; } else { $this->query("SELECT $columnName FROM $table $condition"); } } //簡化刪除del public function delete($table, $condition, $url = '') { if ($this->query("DELETE FROM $table WHERE $condition")) { if (!empty ($url)) $this->Get_admin_msg($url, '刪除成功！'); } } //簡化插入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！'); } } //簡化修改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 操作產生的 ID*/ public function insert_id() { return mysql_insert_id(); } //指向確定的一條資料記錄 public function db_data_seek($id) { if ($id > 0) { $id = $id -1; } if (!@ mysql_data_seek($this->result, $id)) { $this->show_error("SQL語句有誤：", "指定的資料為空白"); } return $this->result; } // 根據select查詢結果計算結果集條數 public function db_num_rows() { if ($this->result == null) { if ($this->show_error) { $this->show_error("SQL語句錯誤", "暫時為空白，沒有任何內容！"); } } else { return mysql_num_rows($this->result); } } // 根據insert,update,delete執行結果取得影響行數 public function db_affected_rows() { return mysql_affected_rows(); } //輸出顯示sql語句 public function show_error($message = "", $sql = "") { if (!$sql) { echo "" . $message . ""; echo " "; } else { echo ""; echo "錯誤資訊提示: "; echo ""; echo ""; echo "錯誤號碼：12142"; echo " "; echo "錯誤原因：" . 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客戶IP:$ip" . "\r\n時間 :$time" . "\r\n\r\n"; $server_date = date("Y-m-d"); $filename = $server_date . ".txt"; $file_path = "error/" . $filename; $error_content = $message; //$error_content="錯誤的資料庫，不可以連結"; $file = "error"; //設定檔案儲存目錄 //建立檔案夾 if (!file_exists($file)) { if (!mkdir($file, 0777)) { //預設的 mode 是 0777，意味著最大可能的訪問權 die("upload files directory does not exist and creation failed"); } } //建立txt日期檔案 if (!file_exists($file_path)) { //echo "建立日期檔案"; fopen($file_path, "w+"); //首先要確定檔案存在並且可寫 if (is_writable($file_path)) { //使用添加模式開啟$filename，檔案指標將會在檔案的開頭 if (!$handle = fopen($file_path, 'a')) { echo "不能開啟檔案 $filename"; exit; } //將$somecontent寫入到我們開啟的檔案中。 if (!fwrite($handle, $error_content)) { echo "不能寫入到檔案 $filename"; exit; } //echo "檔案 $filename 寫入成功"; echo "——錯誤記錄被儲存!"; //關閉檔案 fclose($handle); } else { echo "檔案 $filename 不可寫"; } } else { //首先要確定檔案存在並且可寫 if (is_writable($file_path)) { //使用添加模式開啟$filename，檔案指標將會在檔案的開頭 if (!$handle = fopen($file_path, 'a')) { echo "不能開啟檔案 $filename"; exit; } //將$somecontent寫入到我們開啟的檔案中。 if (!fwrite($handle, $error_content)) { echo "不能寫入到檔案 $filename"; exit; } //echo "檔案 $filename 寫入成功"; echo "——錯誤記錄被儲存!"; //關閉檔案 fclose($handle); } else { echo "檔案 $filename 不可寫"; } } } echo " "; if ($this->is_error) { exit; } } echo ""; echo " "; echo " "; } //釋放結果集 public function free() { @ mysql_free_result($this->result); } //資料庫選擇 public function select_db($db_database) { return mysql_select_db($db_database); } //查詢欄位數量 public function num_fields($table_name) { //return mysql_num_fields($this->result); $this->query("select * from $table_name"); echo " "; echo "欄位數：" . $total = mysql_num_fields($this->result); echo " "; for ($i = 0; $i < $total; $i++) { print_r(mysql_fetch_field($this->result, $i)); } echo " "; echo " "; } //取得 MySQL 伺服器資訊 public function mysql_server($num = '') { switch ($num) { case 1 : return mysql_get_server_info(); //MySQL 伺服器資訊 break; case 2 : return mysql_get_host_info(); //取得 MySQL 主機資訊 break; case 3 : return mysql_get_client_info(); //取得 MySQL 用戶端資訊 break; case 4 : return mysql_get_proto_info(); //取得 MySQL 協議資訊 break; default : return mysql_get_client_info(); //預設取得mysql版本資訊 } } //解構函式，自動關閉資料庫,記憶體回收機制 public function __destruct() { if (!empty ($this->result)) { $this->free(); } mysql_close($this->conn); } //function __destruct(); /*獲得用戶端真實的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 "輸入非法注入內容！"; exit (); } else { return $sql_str; } } function checkurl() { //檢查來路 if (preg_replace("/https?:\/\/([^\:\/]+).*/i", "\\1", $_SERVER['HTTP_REFERER']) !== preg_replace("/([^\:]+).*/", "\\1", $_SERVER['HTTP_HOST'])) { header("Location: http://www.dareng.com"); exit(); } } } ?> 複製代碼

php, mysql

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