Passing variables to included file for use in another file

When you include a file in PHP, at runtime the PHP interpreter creates one large file. Where ever you have the "include()" or "require()" functions, the contents of those files are inserted there. So, in fact, you essentially end up with one single file at runtime. Thus, a variable declared at the top of the index.php file should be accessible throughout.

Having said this, please be aware of variable scope. For example, if you declare a variable at the top of the index.php file, and try to reference that variable inside a function in another file being included in the index.php file, that will not work because you are looking for a local variable in a function which is actually a global variable. To solve this problem, you use the "global" keyword to indicate that a certain variable indicator should point to the global variable.

For example:

<?php
$my_var = 1;

function my_funct() {
    global $my_var;

    print $my_var; // Will print 1
}

I hope that is useful.

Regards, Ralfe

If the code inside calendar.php and calendarnew.php is executed before $passdate is assigned, it's impossible to access it.

If you are trying to access $passdate inside a function within the calendar.php or calendarnew.php file, simply refer to it as a global varialble.

Example :

index.php file

include 'calendar.php';
//some code
$passdate = 'same value';

calendar.php file

include 'calendarnew.php';
function someFunctionName()
{
    global $passdate;
    return $passdate . ' append value';
}

Hope it helps