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MySQL PDO连接与操作

2015-07-01 16:07 543 查看 
//实例化PDO类 连接数据库  参数是 mysql:host=localhost;dbname=lamp 用户名  密码
$pdo = new PDO('mysql:host=localhost;dbname=lamp', 'root', '');
//查询语句

$sql = "select * from lamp_login";
$stmt = $pdo->query($sql);

//增 删  改
$pdo->exec($sql);




PDO::FETCH_OBJ相当于mysql_fetch_object
object(stdClass)[3]
public 'id' =>  '1' (length=1)
public 'username' =>  'user1' (length=5)
public 'password' =>  '123' (length=3)
PDO::FETCH_BOTH相当于mysql_fetch_array
array (size=6)
'id' =>  '2' (length=1)
0 =>  '2' (length=1)
'username' =>  'user2' (length=5)
1 =>  'user2' (length=5)
'password' =>  '234' (length=3)
2 =>  '234' (length=3)
PDO::FETCH_NUM相当于mysql_fetch_row
array (size=3)
0 =>  '3' (length=1)
1 =>  'user3' (length=5)
2 =>  '345' (length=3)
PDO::FETCH_ASSOC相当于mysql_fetch_assoc
array (size=3)
'id' =>  '4' (length=1)
'username' =>  'zhouyao' (length=7)
'password' =>  '123456' (length=6)

                                            

                                        

                        
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                                                php
                                                pdo
                                                mysql
                                                数据库
                                                实例
                                                

                        

                    


                

            


            

                
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