PHP 创建重用数据库连接函数 mysqli与PDO

 代码如下：

    有兴趣的可以测试下

     摘自于某书

     

 1 <? php  2     

 3  public function dbConnect( $usertype, $connectionType = 'mysqli' ) {  4         $host = 'localhost';  5         $db = 'phpsols';  6         if( $usertype == 'read') {  7             $user = 'psread';  8             $pwd = '123456';  9         } else if ( $usertype == 'write' ) { 10             $user = 'pswrite'; 11             $pwd = '123456'; 12         } else { 13             exit( 'Unrecognized connection type' ); 14  } 15         if( $connectionType == 'mysqli') { 16             return new mysqli( $host, $user, $pwd, $db ) or die( 'Cannot open database' ); 17         } else { 18             try { 19                 return new PDO( "mysql:host=$host;dbname=$db", $user, $pwd ); 20             } catch( PDOException $e ) { 21                 $e -> getMessage; 22                 echo 'Cannot connect to database'; 23                 exit; 24  } 25  } 26  } 27     

28 ?>