无法检索index.php上的主题选项

我有一个主题，我可以检索标题上的主题选项。php文件，并将选项保存在变量中。

<?php
global $options_name;
$options = get_option($options_name);
//$options returns the theme options when called on header.php but an empty array on index.php

?>

当我声明相同的全局变量并将选项存储在索引中的变量中时，返回一个空数组。主题文件的php。

如何在索引中检索主题选项。php文件，因为它在头文件中工作良好。php？

这是标题。php文件：

<?php global $option_name; 
$options = get_option($option_name);
?>
<!DOCTYPE PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US" xml:lang="en-US" prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#" >
    <head>
        <meta charset="<?php bloginfo(\'charset\'); ?>" />
        <meta name="viewport" content="width=device-width" />
        <title><?php
    /*
     * Print the <title> tag based on what is being viewed.
     */
    global $page, $paged;

    wp_title( \'|\', true, \'right\' );

    // Add the blog name.
    bloginfo( \'name\' );

    // Add the blog description for the home/front page.
    $site_description = get_bloginfo( \'description\', \'display\' );
    if ( $site_description && ( is_home() || is_front_page() ) )
        echo " | $site_description";

    // Add a page number if necessary:
    if ( $paged >= 2 || $page >= 2 )
        echo \' | \' . sprintf( __( \'Page %s\', \'PuraVida\' ), max( $paged, $page ) );

    ?></title>
        <link rel="stylesheet" type="text/css" href="<?php bloginfo(\'template_directory\'); ?>/style.css" />
        <link href=\'http://fonts.googleapis.com/css?family=Oswald:400,700\' rel=\'stylesheet\' type=\'text/css\'>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>                
       <script src="<?php bloginfo(\'template_directory\'); ?>/js/jquery-dropdown.js"></script>


   <?php wp_head(); ?>
    </head>
    <body <?php body_class(); ?>>
        <header class="wrap">
            <div class="logoarea">
                <a href="<?php bloginfo(\'wpurl\'); ?>"><img src="<?php echo $options["logo"]; ?>" /></a>
            </div>
            <div class="navmenu">
                <?php wp_nav_menu( array( \'container_class\' => \'menu-header\', \'theme_location\' => \'primary\', \'fallback_cb\' => FALSE ) ) ?>
            </div>

        </header>

这是索引。php文件：

<?php get_header(); ?>

<?php get_sidebar(); ?>

        <div class="clear"></div>
        <?php get_footer(); ?>

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