将语言数组设置为常量

My site is translated using language files, such as "en/home.php" which inside has content such as...

<?php
$lang = array(
'welcome' => 'Welcome to DugoutSoccer.com',
'login' => 'Login',
'pw' => 'Password'
);
?> 

In several functions I make $lang global and wanted to save the need for this (if it's worth it). The files can be as large as 25Kb, would it be acceptable to define this as a constant?

Thanks

Basically just normal defintion of Constant and unseralizing the constant...

# define constant, serialize array
define ("ConstantVar", serialize (array ('welcome' => 'Welcome to DugoutSoccer.com',
'login' => 'Login',
'pw' => 'Password')));

# use it
$my_constant= unserialize (ConstantVar);