PDO

 1 //PDO
 2 //1.訪問不一樣的數據庫
 3 //2.自帶事務功能
 4 //3.防止SQL注入
 5 
 6 /*//1.造對象
 7 $dsn = "mysql:dbname=mydb;host=localhost";
 8 $pdo = new PDO($dsn,"root","123");
 9 
10 //2.寫SQL語句
11 $sql = "update nation set name='獸族' where code='n013'";
12 
13 //3.執行SQL語句
14 //$r = $pdo->query($sql);
15 $r = $pdo->exec($sql);*/
16 
17 //事務功能
18 //造對象
19 $dsn = "mysql:dbname=mydb;host=localhost";
20 $pdo = new PDO($dsn,"root","123");
21 
22 //設置異常模式
23 $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
24 
25 
26 //寫SQL語句
27 $sql1 = "insert into nation values('n016','人族')";
28 $sql2 = "insert into nation values('n017','不死族')";
29 
30 //執行兩條SQL語句
31 try
32 {
33     //啓動事務
34     $pdo->beginTransaction();
35     
36     $pdo->exec($sql1);
37     $pdo->exec($sql2);
38     
39     //提交事務
40     $pdo->commit();
41 }
42 catch(PDOException $e)
43 {
44     //$e->getMessage();
45     //回滾
46     $pdo->rollBack();
47 }

 1 //造對象
 2 $dsn = "mysql:dbname=mydb;host=localhost";
 3 $pdo = new PDO($dsn,"root","123");
 4 
 5 //寫SQL語句,預處理語句
 6 $sql = "insert into nation values(?,?)";
 7 
 8 //準備SQL語句,返回statement對象
 9 $st = $pdo->prepare($sql);
10 
11 //綁定參數
12 /*$st->bindParam(1,$code);
13 $st->bindParam(2,$name);
14 
15 $code="n022";
16 $name="矮人族";*/
17 
18 $attr = array("n023","魔族");
19 
20 //提交執行,不用給SQL語句了，已經傳過去了
21 var_dump($st->execute($attr));
22 
23 
24 //預處理語句裏面用?佔位的，給數組的時候要給索引數組

 1 //造對象
 2 $dsn = "mysql:dbname=mydb;host=localhost";
 3 $pdo = new PDO($dsn,"root","123");
 4 
 5 //寫SQL語句,預處理語句，使用name佔位
 6 $sql = "insert into nation values(:code,:name)";
 7 
 8 //準備執行
 9 $st = $pdo->prepare($sql);
10 
11 //綁定參數
12 /*$st->bindParam(":code",$code,PDO::PARAM_STR);
13 $st->bindParam(":name",$name,PDO::PARAM_STR);
14 
15 $code="n024";
16 $name="狼族";*/
17 
18 $attr = array("code"=>"n025","name"=>"蟲族");
19 
20 //執行
21 $st->execute($attr);

 1 //造對象
 2 $dsn = "mysql:dbname=mydb;host=localhost";
 3 $pdo = new PDO($dsn,"root","123");
 4 
 5 //寫SQL語句,預處理語句
 6 $sql = "select * from nation";
 7 
 8 //準備執行
 9 $st = $pdo->prepare($sql);
10 
11 //執行
12 $st->execute();
13 
14 //讀數據
15 var_dump($st->fetchAll(PDO::FETCH_ASSOC));

1 //寫SQL語句,預處理語句，使用name佔位
2 $sql = "insert into nation values(:code,:name)";
3 
4 //準備執行
5 $st = $pdo->prepare($sql);
6 
7 //執行
8 $st->execute($_POST);