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                PDO對象 ==== MySQL函數在PHP5.5高版本中,被廢棄,由PDO組件和mysqli組件取代。 POD擴展是在PHP5中加入,該擴展為PHP內置類,提供了對多種數據庫的統一抽象訪問接口。 PDO來對數據庫進行訪問,不同數據庫使用相同的方法名,解決數據庫連接不統一的問題。 PDO::query()主要是用于有記錄結果返回的操作,特別是Select操作, PDO::exec()主要是針對沒有結果集合返回的操作,比如Insert、Update、Delete等操作,它返回的結果是當前操作影響的列數。 ~~~ $dsn = "mysql:host=127.0.0.1;dbname=數據庫名稱"; $db = new PDO($dsn, '數據庫用戶名', '密碼'); $rs = $db->query("SELECT* FROM book"); while($row = $rs->fetch()){ print_r($row); } ~~~~ 基于配置的PDO連接字符串 ~~~ // 數據庫參數配置 $conn = array( 'host'=>'127.0.0.1', 'db'=>'test', 'user'=>'abc123', 'pass'=>'abc123' ); $dsn = "mysql:host={$conn['host']};dbname={$conn['db']}"; $db = new PDO($dsn, $conn['user'], $conn['pass']); ~~~
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