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                            ## PDO數據庫連接管理
**新建連接**
>### PDO('mysql:host=localhost;dbname=test', $user, $pass[,$params]);

創建一個數據庫連接，返回一個PDO對象
*例子*
~~~
<?php
$dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass);
?>
~~~
*持久連接列子*
~~~
<?php
$dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass, array(
    PDO::ATTR_PERSISTENT => true
));
?>

~~~
**關閉連接**
默認會在php結束時自動關閉,也可以賦一個 NULL 值給對象變量
*例子*
~~~
<?php
$dbh = new PDO('mysql:host=localhost;dbname=test', $user, $pass);
$dbh = NULL;
?>
~~~


                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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