Php if statement redirection - php

Question

I have a simple php page that contain form with action that directed to a file called getData.php, here’s the PHP page:
<?php
if(isset($_GET['login_attempt'])) {
echo 'LOGIN ATTEMP 1';
}else{
echo 'NO LOGIN ATTEMP';
}
?>
<form id="info" action="getData.php" method="post">
<input type="text" class="input" name="info1" /><br>
<input type="password" class="input" name="info2" /><br>
<input type="submit" value="" id="submit-button">
</form>
And here's the getData.php file:
if (!isset($_GET['login_attempt'])) {
header('location: /login.php?login_attempt=1');
} else {
header('location: http://www.stackoverflow.com');
}
As you can see in the getData.php file after two attempts of logging in the php page should go to http://www.stackoverflow.com, but the php page get stuck in /login.php?login_attempt=1 forever after the first attempt, why?

Answer 1

Here is how you can handle this
<?php
$attempt = 1;
if(isset($_GET['login_attempt'])) {
$attempt ++;//Now attempt will have 2
echo 'LOGIN ATTEMP 1';
}else{
echo 'NO LOGIN ATTEMP';
}
?>
<form id="info" action="getData.php" method="post">
<input type="hidden" class="input" name="login_attempt" value='<?php echo $attempt;?>' /><br>
<input type="text" class="input" name="info1" /><br>
<input type="password" class="input" name="info2" /><br>
<input type="submit" value="" id="submit-button">
</form>
And here's the "getData.php" file:
<?php
if (isset($_POST['login_attempt']) AND $_POST['login_attempt'] !== 2) {
header('location: /login.php?login_attempt=1');
} else {
header('location:http://www.stackoverflow.com');
}
?>
EDIT
Why your page stuck on first attempt. Here is the answer.
When ever you redirect to login page the first condition is matched. As you have no criteria to tell getData.php which attempt is this there fore you are stuck. Use a variable $attempt as i have used in login.php initialize it with 1. If there is 2nd attempt increment it with 1. Put it in h hidden field so that getData.php its number. and will then redirect to according to your needs.

Answer 2

Change the line
<input type="submit" value="" id="submit-button">
to
<input type="submit" value="" id="submit-button" name="login_attempt">
and
from file getData.php
change the line
if (!isset($_GET['login_attempt']))
to
if (!isset($_POST['login_attempt']))
as you are using post method in the form ( <form id="info" action="getData.php" method="post">).
and change this line to
if(isset($_GET['login_attempt']))
to
if($_GET['login_attempt']==1)
i think this will solve your problem.