?? ???? ????? ??? ??? ???? ??? main.php? ?????

?? main.php ??? ???? ??? ???????

?? ??????? ???? ??? ????? , ?? conn.php ?????

require_once("conn.php"); //?? ?????? ??? ?????

??? ???? ??? post ?????

$name=$_POST ['username'];

$password=$_POST['password'];

??? ????? ?? ?? ???? ?? ? ?? ??? ?????

?? ?? ??? ?? ??? ?????.

???? ?? ???? ???? ?????? ?? ???? ???.

???? ??? ??? ?????? ???? ??? ???? ? ????. ?? ???? ?? ???? ? ????

??? Query ?? ?????

$sql = "select * from user where username='$name' and pass='$password'";

?? ?? sql ?? ?????.

$info = mysql_query($sql);

??? ???? ?? ??? ????. mysql_fetch_row ??? ?? ?? ???? ??? ??? ?? ????.

$row = mysql_fetch_row($info );

?? ?? $row? ???? ???. ???? ???? ????, ??? ??? ?????.

?? ??? ??? ????.

<?php
    require_once("conn.php");//首先鏈接數(shù)據(jù)庫(kù)

    $name=$_POST['username'];
    $password=$_POST['password'];

    $sql = "select * from user where username='$name' and password='$password'";
    $info = mysql_query($sql);
    $row = mysql_fetch_row($info);
    if($row){
        echo "<script>alert('登錄成功')</script>";
    }else{
        echo "<script>alert('登錄失敗')</script>";
        //echo "<script>history.go(-1);</script>";   //登錄失敗返回上一個(gè)頁(yè)面
        echo "<script>location.href='login.php';</script>";  //登錄失敗，跳轉(zhuǎn)到另外一個(gè)頁(yè)面
    }

?>