PHP自学第一课

1.PDO链接方式

try

{

   $conn =  new PDO('mysql:host=localhost;dbname=toha','root', '3602001');

   if (!$conn) {

          echo "链接数据库失败！";

   }

   $sqlInsert = "SELECT * FROM memberinfo";

   $conn->exec("set names utf8");

   $stmt = $conn->prepare($sqlInsert);

   $rs = $stmt->execute();

    while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {

    $name = $row['NAME'];

    $pwd = $row['pwd'];

    echo "Name: $name ";

    echo "Age: $pwd ".'<br/>';

  }

}

catch(Exception $ex)

{

    echo $ex;
}

2. mysq原方法

$conn = mysql_connect('localhost','root','3602001');

if (!$conn) {

    die('Could not connect: ' . mysql_error());

}

$Sql = "SELECT * FROM memberinfo where NAME = '$_POST[username]'";

$sqlInsert = " INSERT INTO memberinfo(NAME,pwd) values('$_POST[username]','$_POST[pwd]')";

mysql_select_db('toha');

mysql_set_charset('utf8',$conn);

$rs = mysql_query($Sql,$conn);

if (mysql_num_rows($rs)<1) {

    $rs2 = mysql_query($sqlInsert,$conn);

    if ($rs2) {

        exit("成功");

    }

}