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<?php
session_start();
header("Content-type:text/html;charset=utf-8");
$link = mysqli_connect('localhost','root','root','login'); //鏈接數(shù)據(jù)庫
mysqli_set_charset($link ,'utf8'); //設(shè)定字符集
$name=$_POST['username'];
$pwd=$_POST['password'];
$yzm=$_POST['yzm'];
if($name==''){
echo "<script>alert('請(qǐng)輸入用戶名');location='" . $_SERVER['HTTP_REFERER'] . "'</script>";
exit;
}
if($pwd==''){
echo "<script>alert('請(qǐng)輸入密碼');location='" . $_SERVER['HTTP_REFERER'] . "'</script>";
exit;
}
if($yzm!=$_SESSION['VCODE']){
echo"<script>alert('你的驗(yàn)證碼不正確，請(qǐng)重新輸入');location='".$_SERVER['HTTP_REFERER']. "'</script>";
exit;
}
$sql_select="select id,username,password from user where username= ?"; //從數(shù)據(jù)庫查詢信息
$stmt=mysqli_prepare($link,$sql_select);
mysqli_stmt_bind_param($stmt,'s',$name);
mysqli_stmt_execute($stmt);
$result=mysqli_stmt_get_result($stmt);
$row=mysqli_fetch_assoc($result);
if($row){
if($pwd !=$row['password'] || $name !=$row['username']){
echo "<script>alert('密碼錯(cuò)誤，請(qǐng)重新輸入');location.href='login.html'</script>";
exit;
}
else{
$_SESSION['username']=$row['username'];
$_SESSION['id']=$row['id'];
echo "<script>alert('登錄成功');location.href='first.html'</script>";
}
}else{
echo "<script>alert('您輸入的用戶名不存在');location.href='login.html'</script>";
exit;
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