操作類

class pdomysql {
 public static $dbtype = 'mysql';
 public static $dbhost = '';
 public static $dbport = '';
 public static $dbname = '';
 public static $dbuser = '';
 public static $dbpass = '';
 public static $charset = '';
 public static $stmt = null;
 public static $DB = null;
 public static $connect = true; // 是否長連接
 public static $debug = false;
 private static $parms = array ();
 
 /**
  * 構造函數
  */
 public function __construct() {
  self::$dbtype = 'mysql';
  self::$dbhost = HOST;
  self::$dbport = '3306';
  self::$dbname = 'tion';
  self::$dbuser = 'manager';
  self::$dbpass = '123';
  self::$connect = true;
  self::$charset = 'UTF8';
  self::connect ();
  self::$DB->setAttribute ( PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, true );
  self::$DB->setAttribute ( PDO::ATTR_EMULATE_PREPARES, true );
  self::execute ( 'SET NAMES ' . self::$charset );
 }
 /**
  * 析構函數
  */
 public function __destruct() {
  self::close ();
 }
 
 /**
  * *******************基本方法開始********************
  */
 /**
  * 作用:連結數據庫
  */
 public function connect() {
  try {
   self::$DB = new PDO ( self::$dbtype . ':host=' . self::$dbhost . ';port=' . self::$dbport . ';dbname=' . self::$dbname, self::$dbuser, self::$dbpass, array (
     PDO::ATTR_PERSISTENT => self::$connect 
   ) );
  } catch ( PDOException $e ) {
   die ( "Connect Error Infomation:" . $e->getMessage () );
  }
 }
 
 /**
  * 關閉數據連接
  */
 public function close() {
  self::$DB = null;
 }
 
 /**
  * 對字串進行轉義
  */
 public function quote($str) {
  return self::$DB->quote ( $str );
 }
 
 /**
  * 作用:獲取數據表里的欄位
  * 返回:表字段結構
  * 類型:數組
  */
 public function getFields($table) {
  self::$stmt = self::$DB->query ( "DESCRIBE $table" );
  $result = self::$stmt->fetchAll ( PDO::FETCH_ASSOC );
  self::$stmt = null;
  return $result;
 }
 
 /**
  * 作用:獲得最后INSERT的主鍵ID
  * 返回:最后INSERT的主鍵ID
  * 類型:數字
  */
 public function getLastId() {
  return self::$DB->lastInsertId ();
 }
 
 /**
  * 作用:執(zhí)行INSERT\UPDATE\DELETE
  * 返回:執(zhí)行語句影響行數
  * 類型:數字
  */
 public function execute($sql) {
  self::getPDOError ( $sql );
  return self::$DB->exec ( $sql );
 }
 
 /**
  * 獲取要操作的數據
  * 返回:合併后的SQL語句
  * 類型:字串
  */
 private function getCode($table, $args) {
  $code = '';
  if (is_array ( $args )) {
   foreach ( $args as $k => $v ) {
    if ($v == '') {
     continue;
    }
    $code .= "`$k`='$v',";
   }
  }
  $code = substr ( $code, 0, - 1 );
  return $code;
 }
 
 
 public function optimizeTable($table) {
  $sql = "OPTIMIZE TABLE $table";
  self::execute ( $sql );
 }
 
 
 /**
  * 執(zhí)行具體SQL操作
  * 返回:運行結果
  * 類型:數組
  */
 private function _fetch($sql, $type) {
  $result = array ();
  self::$stmt = self::$DB->query ( $sql );
  self::getPDOError ( $sql );
  self::$stmt->setFetchMode ( PDO::FETCH_ASSOC );
  switch ($type) {
   case '0' :
    $result = self::$stmt->fetch ();
    break;
   case '1' :
    $result = self::$stmt->fetchAll ();
    break;
   case '2' :
    
    $result = self::$stmt->rowCount ();
    
    break;
  }
  self::$stmt = null;
  return $result;
 }
 
 /**
  * *******************基本方法結束********************
  */
 
 /**
  * *******************Sql操作方法開始********************
  */
 /**
  * 作用:插入數據
  * 返回:表內記錄
  * 類型:數組
  * 參數:$db->insert('$table',array('title'=>'Zxsv'))
  */
 public function add($table, $args) {
  $sql = "INSERT INTO `$table` SET ";
  
  $code = self::getCode ( $table, $args );
  $sql .= $code;

  return self::execute ( $sql );
 }
 
 /**
  * 修改數據
  * 返回:記錄數
  * 類型:數字
  * 參數:$db->update($table,array('title'=>'Zxsv'),array('id'=>'1'),$where
  * ='id=3');
  */
 public function update($table, $args, $where) {
  $code = self::getCode ( $table, $args );
  $sql = "UPDATE `$table` SET ";
  $sql .= $code;
  $sql .= " Where $where";
  
  return self::execute ( $sql );
 }
 
 /**
  * 作用:刪除數據
  * 返回:表內記錄
  * 類型:數組
  * 參數:$db->delete($table,$condition = null,$where ='id=3')
  */
 public function delete($table, $where) {
  $sql = "DELETE FROM `$table` Where $where";
  return self::execute ( $sql );
 }
 
 /**
  * 作用:獲取單行數據
  * 返回:表內第一條記錄
  * 類型:數組
  * 參數:$db->fetOne($table,$condition = null,$field = '*',$where ='')
  */
 public function fetOne($table, $field = '*', $where = false) {
  $sql = "SELECT {$field} FROM `{$table}`";
  $sql .= ($where) ? " WHERE $where" : '';
  return self::_fetch ( $sql, $type = '0' );
 }
 /**
  * 作用:獲取所有數據
  * 返回:表內記錄
  * 類型:二維數組
  * 參數:$db->fetAll('$table',$condition = '',$field = '*',$orderby = '',$limit
  * = '',$where='')
  */
 public function fetAll($table, $field = '*', $orderby = false, $where = false) {
  $sql = "SELECT {$field} FROM `{$table}`";
  $sql .= ($where) ? " WHERE $where" : '';
  $sql .= ($orderby) ? " ORDER BY $orderby" : '';
  return self::_fetch ( $sql, $type = '1' );
 }
 /**
  * 作用:獲取單行數據
  * 返回:表內第一條記錄
  * 類型:數組
  * 參數:select * from table where id='1'
  */
 public function getOne($sql) {
  return self::_fetch ( $sql, $type = '0' );
 }
 /**
  * 作用:獲取所有數據
  * 返回:表內記錄
  * 類型:二維數組
  * 參數:select * from table
  */
 public function getAll($sql) {
  return self::_fetch ( $sql, $type = '1' );
 }
 /**
  * 作用:獲取首行首列數據
  * 返回:首行首列欄位值
  * 類型:值
  * 參數:select `a` from table where id='1'
  */
 public function scalar($sql, $fieldname) {
  $row = self::_fetch ( $sql, $type = '0' );
  return $row [$fieldname];
 }
 /**
  * 獲取記錄總數
  * 返回:記錄數
  * 類型:數字
  * 參數:$db->fetRow('$table',$condition = '',$where ='');
  */
 public function fetRowCount($table, $field = '*', $where = false) {
   $sql = "SELECT COUNT({$field}) AS num FROM $table";
  $sql .= ($where) ? " WHERE $where" : '';
  return self::_fetch ( $sql, $type = '0' );
 }
 
 /**
  * 獲取記錄總數
  * 返回:記錄數
  * 類型:數字
  * 參數:select count(*) from table
  */
 public function getRowCount($sql) {
  return self::_fetch ( $sql, $type = '2' );
 }
 
 /**
  * *******************Sql操作方法結束********************
  */
 
 /**
  * *******************錯誤處理開始********************
  */
 
 /**
  * 設置是否為調試模式
  */
 public function setDebugMode($mode = true) {
  return ($mode == true) ? self::$debug = true : self::$debug = false;
 }
 
 /**
  * 捕獲PDO錯誤信息
  * 返回:出錯信息
  * 類型:字串
  */
 private function getPDOError($sql) {
  self::$debug ? self::errorfile ( $sql ) : '';
  if (self::$DB->errorCode () != '00000') {
   $info = (self::$stmt) ? self::$stmt->errorInfo () : self::$DB->errorInfo ();
   echo (self::sqlError ( 'mySQL Query Error', $info [2], $sql ));
   exit ();
  }
 }
 private function getSTMTError($sql) {
  self::$debug ? self::errorfile ( $sql ) : '';
  if (self::$stmt->errorCode () != '00000') {
   $info = (self::$stmt) ? self::$stmt->errorInfo () : self::$DB->errorInfo ();
   echo (self::sqlError ( 'mySQL Query Error', $info [2], $sql ));
   exit ();
  }
 }
 
 /**
  * 寫入錯誤日志
  */
 private function errorfile($sql) {
  echo $sql . &#39;<br />&#39;;
  $errorfile = _ROOT . &#39;./dberrorlog.php&#39;;
  $sql = str_replace ( array (
    "\n",
    "\r",
    "\t",
    "  ",
    "  ",
    "  " 
  ), array (
    " ",
    " ",
    " ",
    " ",
    " ",
    " " 
  ), $sql );
  if (! file_exists ( $errorfile )) {
   $fp = file_put_contents ( $errorfile, "<?PHP exit(&#39;Access Denied&#39;); ?>\n" . $sql );
  } else {
   $fp = file_put_contents ( $errorfile, "\n" . $sql, FILE_APPEND );
  }
 }
 
 /**
  * 作用:運行錯誤信息
  * 返回:運行錯誤信息和SQL語句
  * 類型:字符
  */
 private function sqlError($message = &#39;&#39;, $info = &#39;&#39;, $sql = &#39;&#39;) {
  
  $html = &#39;&#39;;
  if ($message) {
   $html .=  $message;
  }
  
  if ($info) {
   $html .= &#39;SQLID: &#39; . $info ;
  }
  if ($sql) {
   $html .= &#39;ErrorSQL: &#39; . $sql;
  }
  
  throw new Exception($html);
 }
/**
 * *******************錯誤處理結束********************
 */
}