Description:
------------
in_array() function cannot deal with an array that has been declared in an 
included script  , and the compiler shows ths warning :
"PHP Warning:  in_array() expects parameter 2 to be array, null given in ..."




Test script:
---------------
we have 2 files 
file 1 ( arrayFile.php )
----------------------------
<?php

$languages = array('en','fr','es','it','ar','in','ru','jp');

?>
----------------------------
file 2 ( index.php )
----------------------------
<?php
require_once('arrayFile.php');
$language = 'ar';
if(in_array($language,$languages)) 
{
print "200 OK";
} else {
print "404 not found";
}
?>

Expected result:
----------------
i expect that in_array() function returns true while the value of $language is available in $languages directory !

Actual result:
--------------
Returns nothing and provides this warning :
"PHP Warning:  in_array() expects parameter 2 to be array, null given in ..."