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Redirecting to a login page with error messages

 
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I have a login page having two fields username and password.

In the Login.html I have

<form method="post" action="checkLogin.php">
Username : <input type="text" name="username">
Password : <input type="password" name="password">
<input type="submit" value="Login">
</form>

In the checkLogin.php
I want to redirect to user to Login.html if username field or password field left blank.


How can I do that? How can I display error message also with redirection to Login.html.
 
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try with this

<?php
if(!isset($_POST['username']) || !isset($_POST['password']) || empty($_POST['username']) || empty($_POST['password'])){
header("Location:Login.html");
}
?>
 
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