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PHP - form workflow

Posted on 2008-06-22
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Last Modified: 2012-06-27
Hi,

Say I have a TermsAndAgreement.php which contains 2 radio buttons (I Agree|I Disagree) and submit button. Upon choosing one of the radio buttons, then clicking "Submit" then it should go to Signup.php.

What php code do i put in signup.php & TermsAndAgreement.php, so it checks to ensure the user has clicked on "I Agree" previously, else it redirects it back to TermsAndAgreement.php.

Also if the user select "I Disagree", how do i redirect it to readthis.php

Thanks!
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Question by:jedistar
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Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 21841594
Here is an example to help get you started.  Run that and you will see how the variable come through from the form to the subsequent script.
<?php 
if (!empty($_POST)) {
	var_dump($_POST); // SHOW THE POST VARIABLES
}
?>
<form action="<?=$PHP_SELF?>" method="post">
<input name="agreement" type="radio" value="agree" />Agree
<input name="agreement" type="radio" value="disagree" />Disagree
<input type="submit" name="go" value="go" />
</form>

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LVL 109

Expert Comment

by:Ray Paseur
ID: 21841608
This will take you to signup.php (note the action= keyword).
<form action="signup.php" method="post">
<input name="agreement" type="radio" value="agree" />Agree
<input name="agreement" type="radio" value="disagree" />Disagree
<input type="submit" name="go" value="go" />
</form>

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Author Comment

by:jedistar
ID: 21841630
if the user goes to signup.php directly, how do i prevent the user from seeing the signup.php if he has not agreed to the terms.
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Author Comment

by:jedistar
ID: 21841633
and be redirected back to the terms page
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LVL 109

Expert Comment

by:Ray Paseur
ID: 21841631
This will process the $_POST input in signup.php.  I would recommend that you NOT redirect - instead give the client a clear message and let them click the link.  The redirect is likely to be confusing.  You might have to code some kind of GET string, etc.
<?php 
 
/* COMMENT OUT - REMOVE THIS BLOCK
if (!empty($_POST)) {
	var_dump($_POST); // SHOW THE POST VARIABLES
}
*/
 
$agreement	= $_POST["agreement"];
 
if ($agreement == 'disagree') {
	echo "<a href="readthis.php">You checked Disagree.  Please read this.</a>\n";
}
 
if ($agreement != 'agree') {
	echo "<a href="TermsAndAgreement.php">You must check Agree or Disagree.  Please try again.</a>\n";
}

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LVL 109

Expert Comment

by:Ray Paseur
ID: 21841635
In signup.php, you just process the $_POST input.  If it's not what you're expecting, don't worry - just give the client the links to the pages he needs to read.  Easy!
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LVL 109

Expert Comment

by:Ray Paseur
ID: 21841642
Although I would recommend not doing it, the general form of a "redirect" is shown below.  This one redirects to the home page.  Note the "exit" -- the header command will be executed to send the header, then your script will go right on executing the instructions.  You need the exit() function to tell it to stop.
header("Location: /");
exit;

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