It seems pretty simple but I can't find a good way to do it.
Say in the first page I create a variable
$myVariable = "Some text";
And the form's action for that page is "Page2.php". So in Page2.php, how can I have access to that variable? I know I can do it with sessions but I think it's too much for a simple string, and I do only need to pass a simple string (a file name).
How can I achieve this?
HTML / HTTP is stateless, in other words, what you did / saw on the previous page, is completely unconnected with the current page. Except if you use something like sessions, cookies or GET / POST variables. Sessions and cookies are quite easy to use, with session being by far more secure than cookies. More secure, but not completely secure.
//On page 1 $_SESSION['varname'] = $var_value; //On page 2 $var_value = $_SESSION['varname'];
Remember to run the
session_start(); statement on both these pages before you try to access the
$_SESSION array, and also before any output is sent to the browser.
//One page 1 $_COOKIE['varname'] = $var_value; //On page 2 $var_value = $_COOKIE['varname'];
GET and POST
You can add the variable in the link to the next page:
<a href="page2.php?varname=<?php echo $var_value ?>">Page2</a>
This will create a GET variable.
Another way is to include a hidden field in a form that submits to page two:
<form method="get" action="page2.php"> <input type="hidden" name="varname" value="var_value"> <input type="submit"> </form>
And then on page two:
//Using GET $var_value = $_GET['varname']; //Using POST $var_value = $_POST['varname']; //Using GET, POST or COOKIE. $var_value = $_REQUEST['varname'];
Just change the method for the form to
post if you want to do it via post. Both are equally insecure, although GET is easier to hack.
The fact that each new request is, except for session data, a totally new instance of the script caught me when I first started coding in PHP. Once you get used to it, it's quite simple though.
Thanks for the answers above. Here's how I did it, I hope it helps those who follow. I'm looking to pass a registration number from one page to another, hence regName and regValue:
Create your first page, call it set_reg.php:
<?php session_start(); $_SESSION['regName'] = $regValue; ?> <form method="get" action="get_reg.php"> <input type="text" name="regName" value=""> <input type="submit"> </form>
Create your second page, call it get_reg.php:
<?php session_start(); $regValue = $_GET['regName']; echo "Your registration is: ".$regValue."."; ?> <p><a href="set_reg.php">Back to set_reg.php</a>
Although not as comprehensive as the answer above, for my purposes this illustrates in simple fashion the relationship between the various elements.