How to make a PHP variable available in all pages

3 comments

1. That’s not an anomaly. That variable is present in global scope and is being defined in either of the files that you have mentioned. You can easily do it like

   include.php

   <?php
   $myGlobal="Testing";
   ?>
   

   anyfile.php

   <?php
   include "include.php";
   echo $myGlobal;
   ?>
   

   And you can use it in your functions as well, as long as you refer to the global one, for example

   anotherfile.php

   <?php
   include "include.php";
   function test()
   {
    global $myGlobal;
    echo $myGlobal;
   }
   test();
   ?>
   

   Theory

   The scope of a variable is the context within which it is defined. For the most part all PHP variables only have a single scope. This single scope spans included and required files as well

   By declaring (a variable) global within the function, all references to either variable will refer to the global version. There is no limit to the number of global variables that can be manipulated by a function.

   Go through this PHP Doc once and you will have much better idea of how it all works.

   Log in to Reply

2. Take a look at global variables:

   http://php.net/manual/en/language.variables.scope.php

   and superglobal as well:

   http://www.php.net/manual/en/language.variables.superglobals.php

   Log in to Reply

3. php.ini
   register_globals = on

   $post
   $get
   will be available anywhere

   Log in to Reply