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這篇文章主要為大家展示了“php mysql封裝類的示例分析”,內容簡而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領大家一起研究并學習一下“php mysql封裝類的示例分析”這篇文章吧。
具體代碼如下所示:
<?php class mysql { private $db_host; //數據庫主機 private $db_user; //數據庫用戶名 private $db_pwd; //數據庫用戶名密碼 private $db_database; //數據庫名 private $conn; //數據庫連接標識; 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; //數據庫編碼,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,默認關閉 private $is_error = false; //發現錯誤是否立即終止,默認true,建議不啟用,因為當有問題時用戶什么也看不到是很苦惱的 /*構造函數*/ public function __construct($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; $this->connect(); } /*數據庫連接*/ public function connect() { if ($this->conn == "pconn") { //永久鏈接 $this->conn = mysql_pconnect($this->db_host, $this->db_user, $this->db_pwd); } else { //即使鏈接 $this->conn = mysql_connect($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("數據庫不可用:", $this->db_database); } } mysql_query("SET NAMES $this->coding"); } /*數據庫執行語句,可執行查詢添加修改刪除等任何sql語句*/ public function query($sql) { if ($sql == "") { $this->show_error("SQL語句錯誤:", "SQL查詢語句為空"); } $this->sql = $sql; $result = mysql_query($this->sql, $this->conn); if (!$result) { //調試中使用,sql語句出錯時會自動打印出來 if ($this->show_error) { $this->show_error("錯誤SQL語句:", $this->sql); } } else { $this->result = $result; } return $this->result; } /*創建添加新的數據庫*/ public function create_database($database_name) { $database = $database_name; $sqlDatabase = 'create database ' . $database; $this->query($sqlDatabase); } /*查詢服務器所有數據庫*/ //將系統數據庫與用戶數據庫分開,更直觀的顯示? public function show_databases() { $this->query("show databases"); echo "現有數據庫:" . $amount = $this->db_num_rows($rs); echo "<br />"; $i = 1; while ($row = $this->fetch_array($rs)) { echo "$i $row[Database]"; echo "<br />"; $i++; } } //以數組形式返回主機中所有數據庫名 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 $rs; } /*查詢數據庫下所有的表*/ public function show_tables($database_name) { $this->query("show tables"); echo "現有數據庫:" . $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 字段大小寫敏感 mysql_fetch_object() object 用$row[id],$row[content] 字段大小寫敏感 */ /*取得結果數據*/ public function mysql_result_li() { return mysql_result($str); } /*取得記錄集,獲取數組-索引和關聯,使用$row['content'] */ public function fetch_array($resultt="") { if($resultt<>""){ return mysql_fetch_array($resultt); }else{ return mysql_fetch_array($this->result); } } //獲取關聯數組,使用$row['字段名'] public function fetch_assoc() { return mysql_fetch_assoc($this->result); } //獲取數字索引數組,使用$row[0],$row[1],$row[2] public function fetch_row() { return mysql_fetch_row($this->result); } //獲取對象數組,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(); } //指向確定的一條數據記錄 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:", "指定的數據為空"); } 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) { $this->show_error("SQL語句錯誤", "暫時為空,沒有任何內容!"); } } else { return mysql_num_rows($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 "<font color='red'>" . $message . "</font>"; echo "<br />"; } else { echo "<fieldset>"; echo "<legend>錯誤信息提示:</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'>錯誤號:12142</font>"; echo "</div><br />"; echo "錯誤原因:" . 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="錯誤的數據庫,不可以鏈接"; $file = "error"; //設置文件保存目錄 //建立文件夾 if (!file_exists($file)) { if (!mkdir($file, 0777)) { //默認的 mode 是 0777,意味著最大可能的訪問權 die("upload files directory does not exist and creation failed"); } } //建立txt日期文件 if (!file_exists($file_path)) { //echo "建立日期文件"; fopen($file_path, "w+"); //首先要確定文件存在并且可寫 if (is_writable($file_path)) { //使用添加模式打開$filename,文件指針將會在文件的開頭 if (!$handle = fopen($file_path, 'a')) { echo "不能打開文件 $filename"; exit; } //將$somecontent寫入到我們打開的文件中。 if (!fwrite($handle, $error_content)) { echo "不能寫入到文件 $filename"; exit; } //echo "文件 $filename 寫入成功"; echo "——錯誤記錄被保存!"; //關閉文件 fclose($handle); } else { echo "文件 $filename 不可寫"; } } else { //首先要確定文件存在并且可寫 if (is_writable($file_path)) { //使用添加模式打開$filename,文件指針將會在文件的開頭 if (!$handle = fopen($file_path, 'a')) { echo "不能打開文件 $filename"; exit; } //將$somecontent寫入到我們打開的文件中。 if (!fwrite($handle, $error_content)) { echo "不能寫入到文件 $filename"; exit; } //echo "文件 $filename 寫入成功"; echo "——錯誤記錄被保存!"; //關閉文件 fclose($handle); } else { echo "文件 $filename 不可寫"; } } } echo "<br />"; if ($this->is_error) { exit; } } echo "</div>"; echo "</fieldset>"; echo "<br />"; } //釋放結果集 public function free() { @ mysql_free_result($this->result); } //數據庫選擇 public function select_db($db_database) { return mysql_select_db($db_database); } //查詢字段數量 public function num_fields($table_name) { //return mysql_num_fields($this->result); $this->query("select * from $table_name"); echo "<br />"; echo "字段數:" . $total = mysql_num_fields($this->result); echo "<pre>"; for ($i = 0; $i < $total; $i++) { print_r(mysql_fetch_field($this->result, $i)); } echo "</pre>"; echo "<br />"; } //取得 MySQL 服務器信息 public function mysql_server($num = '') { switch ($num) { case 1 : return mysql_get_server_info(); //MySQL 服務器信息 break; case 2 : return mysql_get_host_info(); //取得 MySQL 主機信息 break; case 3 : return mysql_get_client_info(); //取得 MySQL 客戶端信息 break; case 4 : return mysql_get_proto_info(); //取得 MySQL 協議信息 break; default : return mysql_get_client_info(); //默認取得mysql版本信息 } } //析構函數,自動關閉數據庫,垃圾回收機制 public function __destruct() { if (!empty ($this->result)) { $this->free(); } mysql_close($this->conn); } //function __destruct(); /*獲得客戶端真實的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(); } } } ?>
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