一个MYSQL PDO相对完整且功能强大的封装类

代码

// 自己写的一个PDO类

class  CPdo{

protected   $_dsn   =   " mysql:host=localhost;dbname=test " ;
protected   $_name   =   " root " ;
protected   $_pass   =   "" ;
protected   $_condition   =   array ();
protected   $pdo ;
protected   $fetchAll ;
protected   $query ;
protected   $result ;
protected   $num ;
protected   $mode ;
protected   $prepare ;
protected   $row ;
protected   $fetchAction ;
protected   $beginTransaction ;
protected   $rollback ;
protected   $commit ;
protected   $char ;
private   static   $get_mode ;
private   static   $get_fetch_action ;

/* *
*pdo construct
*/
public   function  __construct( $pconnect   =   false ) {

    $this -> _condition  =   array (PDO :: ATTR_PERSISTENT  =>   $pconnect ); 
    $this -> pdo_connect();
}
    
/* *
*pdo connect
*/
private   function  pdo_connect() {

    try {
     $this -> pdo  =   new  PDO( $this -> _dsn , $this -> _name , $this -> _pass , $this -> _condition);
   }  catch ( Exception   $e ) {
     return   $this -> setExceptionError( $e -> getMessage() ,   $e -> getline ,   $e -> getFile);
   } 
  
}

/* *
*self sql get value action
*/
public   function  getValueBySelfCreateSql( $sql ,   $fetchAction   =   " assoc " , $mode   =   null ) {
  
    $this -> fetchAction  =   $this -> fetchAction( $fetchAction );
    $this -> result  =   $this -> setAttribute( $sql ,   $this -> fetchAction ,   $mode );
    $this -> AllValue  =   $this -> result -> fetchAll();
    return   $this -> AllValue;
}

/* *
*select condition can query
*/
private   function  setAttribute( $sql ,   $fetchAction ,   $mode ) {

    $this -> mode  =  self :: getMode( $mode );
    $this -> fetchAction  =  self :: fetchAction( $fetchAction );
    $this -> pdo -> setAttribute(PDO :: ATTR_CASE ,   $this -> mode);
    $this -> query  =   $this -> base_query( $sql );
    $this -> query -> setFetchMode( $this -> fetchAction);
    return   $this -> query;
}

/* *
*get mode action
*/
private   static   function  getMode( $get_style ){
  
    switch ( $get_style ) {
     case   null :
     self :: $get_mode   =  PDO :: CASE_NATURAL;
     break ;
     case   true :
     self :: $get_mode   =  PDO :: CASE_UPPER;
     break ;
     case   false ;
     self :: $get_mode =  PDO :: CASE_LOWER;
     break ;
   }
    return  self :: $get_mode ;

}

/* *
*fetch value action
*/
private   static   function  fetchAction( $fetchAction ) {

    switch ( $fetchAction ) {
     case   " assoc " :
     self :: $get_fetch_action   =  PDO :: FETCH_ASSOC;  // asso array
     break ;
     case   " num " :
     self :: $get_fetch_action   =  PDO :: FETCH_NUM; // num array
     break ;
     case   " object " :
     self :: $get_fetch_action   =  PDO :: FETCH_OBJ;  // object array
     break ;
     case   " both " :
     self :: $get_fetch_action   =  PDO :: FETCH_BOTH; // assoc array and num array
     break ;
     default :
     self :: $get_fetch_action   =  PDO :: FETCH_ASSOC;
     break ;
   }

    return  self :: $get_fetch_action ;
}

/* *
*get total num action
*/
public   function  rowCount( $sql ) {

    $this -> result  =   $this -> base_query( $sql );
    $this -> num  =   $this -> result -> rowCount();
    return   $this -> num;
  
}

/*
*simple query and easy query action
*/
public   function  query( $table ,   $column   =   " * " , $condition   =   array () ,   $group   =   "" , $order   =   "" ,   $having   =   "" ,   $startSet   =   "" , $endSet   =   "" , $fetchAction   =   " assoc " , $params   =   null ){

    $sql   =   " select  " . $column . "  from ` " . $table . " `  " ;
    if  ( $condition   !=   null ) {
   
     foreach ( $condition   as   $key => $value ) {
      $where   .=   " $key  = ' $value ' and  " ;
    }
   
     $sql   .=   " where  $where " ;
     $sql   .=   " 1 = 1  " ;
   }
  
    if  ( $group   !=   "" ) {
     $sql   .=   " group by  " . $group . "   " ;
   }

    if  ( $order   !=   "" ) {
     $sql   .=   "  order by  " . $order . "   " ;
   }
    if  ( $having   !=   "" ) {
     $sql   .=   " having ' $having '  " ;
   }
    if  ( $startSet   !=   ""   &&   $endSet   !=   ""   &&   is_numeric ( $endSet )  &&   is_numeric ( $startSet )) {
     $sql   .=   " limit  $startSet , $endSet " ;
   }
    $this -> result  =   $this -> getValueBySelfCreateSql( $sql ,   $fetchAction ,   $params );
    return   $this -> result;
}

/* *
*execute delete update insert and so on action
*/
public   function   exec ( $sql ) {
  
    $this -> result  =   $this -> pdo -> exec ( $sql );
    $substr   =   substr ( $sql ,   0   , 6 );
    if  ( $this -> result) {
     return   $this -> successful( $substr );
   }  else  {
     return   $this -> fail( $substr );
   }
  
}

/* *
*prepare action
*/
public   function  prepare( $sql ) {

    $this -> prepare  =   $this -> pdo -> prepare( $sql );
    $this -> setChars();
    $this -> prepare -> execute();
    while ( $this -> rowz  =   $this -> prepare -> fetch()) {
   
     return   $this -> row;
   
   }
}

/* *
*USE transaction
*/
public   function  transaction( $sql ) {
  
    $this -> begin();
    $this -> result  =   $this -> pdo -> exec ( $sql );
    if  ( $this -> result) {
     $this -> commit();
   }  else  {
     $this -> rollback();
   }
}

/* *
*start transaction
*/
private   function  begin() {

    $this -> beginTransaction  =   $this -> pdo -> beginTransaction();
    return   $this -> beginTransaction;
}

/* *
*commit transaction
*/
private   function  commit() {

    $this -> commit  =   $this -> pdo -> commit();
    return   $this -> commit;
}

/* *
*rollback transaction
*/
private   function  rollback() {

    $this -> rollback  =   $this -> pdo -> rollback();
    return   $this -> rollback;
}
/* *
*base query
*/
private   function  base_query( $sql ) {

    $this -> setChars();
    $this -> query  =   $this -> pdo -> query( $sql );
    return   $this -> query;
  
}

/* *
*set chars
*/
private   function  setChars() {
  
    $this -> char  =   $this -> pdo -> query( " SET NAMES 'UTF8' " );
    return   $this -> char;
}
    
/* *
*process sucessful action 
*/
private   function  successful( $params ){
  
    return   " The  " . $params . "  action is successful " ;
}

/* *
*process fail action
*/
private   function  fail( $params ){

    return   " The  " . $params . "  action is fail " ;
}

/* *
*process exception action
*/
private   function  setExceptionError( $getMessage ,   $getLine   , $getFile ) {

    echo   " Error message is  " . $getMessage . " <br /> The Error in  " . $getLine . "  line <br /> This file dir on  " . $getFile ;
     exit ();
}
}

 

 

 

 

 

转自：http://hi.baidu.com/striver_php/blog/item/b97201c502d61da08326ac6e.html