PHP Form

[Lectrician]

I have a form submitted to a PHP script.

 

Is there a way to use PHP to tell if the page which the form was submitted to is fresh from the form or has been refreshed by the user?

[redarrow]

php is server side, and has no control over client activity.

 

JavaScript might help it client based.

 

you can cheek if the form was submitted but not refreshed with php.

 

if(isset($_POST['submit'])){ <<< submit is the name of the form, submit button.

 

}

[DeanWhitehouse]

One bad way (kinda hack) to do it would be to store a session when the user first visits the page and submits the form, then in the form validation code check if the session is there.

[Lectrician]

Thanks.

 

I have been googling, and it seems you can send some form POST data via headers?

 

I have tried this code, but it returns a server error, with the log showing that the headers where malformed?

 

Any ideas?

 

<?php
$host = "www.example.com";
$path = "/path/to/script.php";
$data = "data1=value1&data2=value2";
$data = urlencode($data);

header("POST $path HTTP/1.1\r\n" );
header("Host: $host\r\n" );
header("Content-type: application/x-www-form-urlencoded\r\n" );
header("Content-length: " . strlen($data) . "\r\n" );
header("Connection: close\r\n\r\n" );
header($data);
?> 

[doublezer0]

i would store the contents of the form in a session and then check it to see if they are the same values or if it is empty when the form is submitted

[Lectrician]

If the page is refreshed though, the form data would be set ack into the session and so would exist?

 

Or am I barking?

[chokitofrito]

quick answer:

 

if (isset($_SESSION['viewed'])) {

    $_SESSION['viewed'] = $_SESSION['viewed'] + 1

} else

    $_SESSION['viewed'] = 0

}

 

if more than 1, it means it was refreshed or something like that..

[Lectrician]

Thanks.

 

When the form is submitted a new page opens through my perl script.

 

When you hit the back button to go back to this blank php page and then press refresh (because the page has expired), the session will have been cleared wont it?  So when ever the php is executed the session will be renewed?