mysql數據庫連接操作類

2024-09-04 11:44:14

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分享一篇可以記錄錯誤日志的mysql數據庫連接類文件,實例代碼如下:

<?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 = true; //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() {

  return mysql_fetch_array($this->result);

}

// public function fetch_array($query) {

//  return mysql_fetch_array($query);

// }

//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 (!emptyempty ($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 (!emptyempty ($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 (!emptyempty ($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);

  }

}*/

public function db_num_rows($result){

  if($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($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 = $message . "rn$this->sql" . "rn客戶IP:$ip" . "rn時間 :$time" . "rnrn";

    $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 (!emptyempty ($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.49028c.com");

   exit();//開源代碼Vevb.com

  }

}

function htmtocode($content) {

$content = str_replace("n", "<br>", str_replace(" ", " ", $content));

return $content;

}

}

$db=new mysql("localhost","root","","Messages","","gbk");

?>