pass variable across pages

mikesch

Hi,

I have an HTML page with a form where I have to enter a title among other things. When the user hits the Submit button, a PHP page is called where I first connect to a database to see if the title exists. If it does, I include the HTML page, but I also want to somehow set a variable to send back to the HTML page where I would check for that variable and if it's set I would output some error message like: "This title already exists. Please choose a different title."

Here's the PHP code:

//check for similar urltitle
$check = "select title from Item where title='$_POST[title]'";
$check_res = mysql_query($check, $conn) or die(mysql_error());
if (mysql_num_rows($check_res)){ include 'form.html'; exit;}

How can I send a variable to the form.html page? Or any other method?

Thanks.

Mike

gammaster

Hi!

You can rename the file 'form.html' to 'form.php', and then you will have access to the variable $check_res in the form.php. When you include a file you are on the same 'page'.

This will be the same:

//check for similar urltitle
$check = "select title from Item where title='$_POST[title]'";
$check_res = mysql_query($check, $conn) or die(mysql_error());

if (mysql_num_rows($check_res)) {
   echo '<form action="" method="post">'."\n";
   echo '<input type="text" name="myText" value="hallo">'."\n";
   echo '</form>'."\n";
   exit;
   }

mikesch

Thanks.

The problem is that I'm not on the same page when I include form.html. The php code where I check for the same title is on a different page: check.php. And if a same title is found I basically redirect to the form.html page by including it. The problem is I don't know how to send a variable or even a message that would be output on the form.html along the data that's was already typed into the form.

http://phpbuilder.com/board/images/icons/icon5.gif

gammaster

Hi!
If you use a meta refresh tag:
<meta http-equiv="refresh" content="0;URL=http://www.domain.com/file.php">

or in php write the code:

header("Location: http://www.domain.com/file.php");

then you are redirecting.

When you use 'include' you are not redirecting.

If you are redirecting you can put a variable in the url like: http://www.domain.com/file.php?var=value
and access it in file.php like this:

$value = $_GET['var'];