CODEWITHSUNDEEP
php
Lulzim Fazlija
Lulzim Fazlija

Reputation: 885

Passing a variable from one page to another using PHP

Does anyone know what's wrong with the code below that prevents me from printing in File2.php the variable $myusername from File1.php.

I simply wanna print the variable $myusername, or if you know any other way of how to pass that variable that would be very helpful for me.

Here is my example:

File1.php

<?php 
$myusername=$_POST['myusername']; 

function getusername() 
{ 
   return $myusername;    
} 
?>

File2.php

<?php 
require_once('File1.php'); 
getusername(); 
?>

Upvotes: 1

Views: 2905

Answers (3)

Zbigniew
Zbigniew

Reputation: 27584

You need to declare $myusername as global when you are trying to access it from within function, you also need to print is somehow (e.g. echo) ;)

File1.php
<?php 
$myusername=$_POST['myusername']; 

function getusername() 
{ 
   global $myusername; // declare as global
   return $myusername;    
} 
?>

File2.php
<?php 
    require_once('File1.php'); 
    echo getusername();        // echo value
?>

Read more: PHP Variable scope. You could also pass it via $_SESSION.

Upvotes: 3

Robert
Robert

Reputation: 8767

I would advocate utilizing $_SESSION.

Session support in PHP consists of a way to preserve certain data across subsequent accesses. This enables you to build more customized applications and increase the appeal of your web site.

A visitor accessing your web site is assigned a unique id, the so-called session id. This is either stored in a cookie on the user side or is propagated in the URL.

The session support allows you to store data between requests in the $_SESSION superglobal array. When a visitor accesses your site, PHP will check automatically (if session.auto_start is set to 1) or on your request (explicitly through session_start() or implicitly through session_register()) whether a specific session id has been sent with the request. If this is the case, the prior saved environment is recreated.

File1.php

<?php
session_start();
$_SESSION['myusername'] = (isset($_POST['myusername']) ? $_POST['myusername'] : '');
?>

File2.php

<?php
session_start();
echo $_SESSION['myusername'];
?>

You will also notice that in the File1.php code provided, the $_SESSION['myusername'] declaration is checking if the value was provided first. If it was then set the session variable to that value, otherwise set it to empty.

Upvotes: 4

pamil
pamil

Reputation: 980

By session.

File1.php

<?php
session_start();
$_SESSION['myusername'] = $_POST['myusername'];

File2.php

<?php
session_start();
echo $_SESSION['myusername'];

Upvotes: 1

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