PHP:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Bai tap login</title>
<link href="style.css" type="text/css" rel="stylesheet"/>
</head>
<body>
<?php
session_start();//Cau 1
if(isset($_POST['submit'])) //Kiem tra user da submit chua
{
$errors = array();//Khoi tao mang errors rong
$required = array('email','pword');//Tao mang required gom email va password
[/COLOR] foreach($required as $fieldname) //Chay bien required den khi gap gia tri rong
{
//Kiem tra fieldname
if(!isset($_POST[$fieldname]) || empty($_POST[$fieldname])){ {
$errors[] = "The <strong> $fieldname </strong> was left blank.";
}//End: if
}//End: foreach
if(empty($errors))
{
//Ket noi den database baitap voi tai khoan root va pass la rong
$conn = mysqli_connect('localhost','root','','baitap') or die ('Could not connect to database');
$email= mysqli_real_escape_string($conn, $_POST['email']);//Cau 3:Giai thich cau lenh,cu phap
$pword= mysqli_real_escape_string($conn, $_POST['pword']);
$hash_pw=sha1($pword);
$query= "SELECT CONCAT_WS(' ',first_name, last_name)
AS name
FROM user2
WHERE email='{$email}'
AND pword='{$hash_pw}'
LIMIT 1 ";//Cau 4:Giai thich cau truy van,ham CONCAT_WS
$result =mysqli_query($conn,$query) or die (mysqli_error($conn));
if(mysqli_num_rows($result)==1)
{
$_SESSION['email']=$_POST['email'];
$_SESSION['pword']=$_POST['pword'];
while($rows = mysqli_fetch_array($result, MYSQLI_ASSOC)) //Cau 5: Giai thich vong while
{
header ('Location: admin.php');
}//end while
}else
$errors[]="The email or password do not match those on filed.";
}//end empty $errors
}//end isset($_POST['submmit']
?>
<div id="wrapper">
<?php
if(!empty($errors))//Neu $errors co gia tri thi in ra man hinh
{
foreach($errors as $error) //Cau 2:php o may loai vong lap,foreach khac gi voi nhung loai kia,vi du minh hoa
{
echo "<ul>";
echo "<li>".$error."</li>";
echo "</ul>";
}//end foreach
}
?>
<form action='baitap.php' method="post">
<p>
<label for="email"> Email</label>
<input type="text" name="email" />
</p>
<p>
<label for="password">Password</label>
<input type="password" name="pword" />
</p>
<p>
<input type="submit" name="submit" value="submit" />
</p>
</form>
<div class='login'>
<a href="#">Login</a>
</div>
</body>
</html>
Last edited:
