setting variable in header.php but not seen in footer.php - wordpress

Question

in wordpress ,
i set a variable in header.php
<?php
$var= 'anything'
?>
but in footer.php when I echo it
<?php
echo $var;
?>
I got no thing printed ... why !>

Answer 1

You're not in the same scope, as the header and footer files are included in a function's body. So you are declaring a local variable, and referring to another local variable (from another function).
So just declare your variable as global:
$GLOBALS[ 'var' ] = '...';
Then:
echo $GLOBALS[ 'var' ];

Answer 2

I know you've already accepted the answer to this question; however, I think there's a much better approach to the variable scope problem than passing vars into the $GLOBALS array.
Take the functions.php file in your theme for example. This file is included outside the scope of the get_header() and get_footer() functions. In fact it supersedes anything else you might be doing in your theme (and I believe in the plugin scope as well--though I'd have to check that.)
If you want to set a variable that you'd like to use in your header/footer files, you should do it in your functions.php file rather than polluting $GLOBALS array. If you have more variables that you want to sure, consider using a basic Registry object with getters/setters. This way your variables will be better encapsulated in a scope you can control.
Registry
Here's a sample Registry class to get you started if:
<?php
/**
* Registry
*
* #author Made By Me
* #version v0.0.1
*/
class Registry
{
# +------------------------------------------------------------------------+
# MEMBERS
# +------------------------------------------------------------------------+
private $properties = array();
# +------------------------------------------------------------------------+
# ACCESSORS
# +------------------------------------------------------------------------+
/**
* #set mixed Objects
* #param string $index A unique index
* #param mixed $value Objects to be stored in the registry
* #return void
*/
public function __set($index, $value)
{
$this->properties[ $index ] = $value;
}
/**
* #get mixed Objects stored in the registry
* #param string $index A unique ID for the object
* #return object Returns a object used by the core application.
*/
public function __get($index)
{
return $this->properties[ $index ];
}
# +------------------------------------------------------------------------+
# CONSTRUCTOR
# +------------------------------------------------------------------------+
public function __construct()
{
}
}
Save this class in your theme somewhere, e.g. /classes/registry.class.php Include the file at the top of your functions.php file: include( get_template_directory() . '/classes/registry.class.php');
Example Usage
Storing variables:
$registry = new Registry();
$registry->my_variable_name = "hello world";
Retrieving variables:
echo '<h1>' . $registry->my_variable_name . '</h1>'
The registry will accept any variable type.
Note: I normally use SplObjectStorage as the internal datastore, but I've swapped it out for a regular ole array for this case.

Answer 3

I know this is a bit old question and with a solution voted but I though I should share another option and just found a better solution (that works) without using Globals
function fn_your_var_storage( $var = NULL )
{
static $internal;
if ( NULL !== $var )
{
$internal = $var;
}
return $internal;
}
// store the value
fn_your_var_storage( 'my_value' );
// retrieve value
echo fn_your_var_storage(); // print my_value

Answer 4

try this code
first define your initial variable
$var="something";
then use the $_GLOBALS
$_GLOBALS['myvar']=$var;
and finally use the global variable in anywhere you want
global $myvar;
define string inside the $_GLOBALS as taken as global variable name or use the $_GLOBALS['myvar'] direct into the code without using the global

Answer 5

In wordpress Header, any template, Footer is different functions so you have to declare any varible as a global variable then you can access it .
/** header.php **/
<?php
global $xyz;
$xyz="123456"; ?>
/** Template.php or Footer.php **/
<?php
echo $xyz; ///return 123456
?>