Php including files

below is vars.php

<?php

$color = 'green';
$fruit = 'apple';

?>

below is test.php

<?php

echo "A $color $fruit"; // A

include 'vars.php';

echo "A $color $fruit"; // A green apple

?>

simple one from http://php.net/manual/en/function.include.php

declaring global variables

<?php
$a = 1;
$b = 2;

function Sum()
{
    global $a, $b;

    $b = $a + $b;
} 

Sum();
echo $b;
?>

take a look at this http://php.net/manual/en/language.variables.scope.php

Variable scope is inherited.

You can even return a value from an included file! Otherwise you may mostly consider the function to be simple, text-based (lexical) insertion.

See http://php.net/manual/en/function.include.php for more information.