今天学习了下php的数据库操作。

   $conn = mysqli_connect("localhost","root","root","database");

    $results = $conn->query($sql);

用法:

    while( $row=$results->fetch_row())

   {

      print($row[0] . " ". $row[1] . " ".$row[2]. "<br>");   // 0 1 2列

}

<?php

$conn= mysqli_connect("localhost","root","26841397","onlinejudge");  //创建连接对象

 if(empty($conn)) 

  die("error:".mysqli_connect_error());                          //die 等同于exit();

    $sql="CREATE TABLE IF NOT EXISTS TEST(UserName VARCHAR(50) PRIMARY KEY, UserPwd VARCHAR(50),

    ShowName VARCHAR(50))";

    mysqli_query($conn,"SET NAMES gb2312");

    $conn->query($sql);

    $sql="SELECT userName , userID , userSex FROM userInformation";

    $results=$conn->query($sql);

    while($row=$results->fetch_row())                    //获取一行数据

        print($row[0] . " ". $row[1] . " ".$row[2]. "<br>");   // 0 1 2列

    $results->free();

    mysqli_close($conn);                                          //关闭对象

?>