可以'；t访问wordpress中的全局变量

我在function.php中定义了一个函数。在这个函数中，我声明了全局变量。我想在我的自定义插件list.php文件中访问它。我怎样才能做到这一点？

add_filter('gform_pre_submission_filter_12', 'filter_timesheet');
function filter_timesheet($form)
{    
    $project=$_POST['input_1'];
    $date=$_POST['input_2'];
    $user = wp_get_current_user();
    $search_criteria['field_filters'][] = array( 'key' => '9', 'value' => $project );
    $search_criteria['field_filters'][] = array( 'key' => '8', 'value' => $date );
    //$search_criteria['field_filters'][] = array( 'key' => 'created_by', 'value' => $user->ID );
    global $entries; 
    $entries = GFAPI::get_entries(10, $search_criteria );
    return $form;
}