PHP mysqli类

 <?php
     header("content-type:text/html;charset=utf-8");
     $conn = new mysqli("localhost","root","root","test"); //ip、username、password、dbname
     $conn->query("set names utf8");    //设置编码

     $sql = "SELECT * FROM TEST";
     $result = $conn->query($sql);

     while ($row = $result->fetch_assoc()) {
         echo $row["name"];
         echo "<br/>";
     }
     while ($row = $result->fetch_row()) {
         echo $row[0];
         echo "<br/>";
     }

     $sql = "INSERT INTO TEST(id) VALUES(2)";
     $conn->query($sql);
     if($conn->affected_rows>0) {
         echo $conn->insert_id;
     } else {
         echo -1;
     }

     $conn->autocommit(FALSE); //默认是自动提交的，设置为不自动提交，才可以使用事务
     $sql1 = ".....";
     $sql2 = ".....";
     $conn->query($sql1);
     $conn->query($sql2);
     if(!$conn->errno) {
         $conn->commit();
     } else {
         $conn->rollback();
     }

 ?>