无法扩展所使用的默认标头WP_Theme:

private static $file_headers = array(
    \'Name\'        => \'Theme Name\',
    \'ThemeURI\'    => \'Theme URI\',
    \'Description\' => \'Description\',
    \'Author\'      => \'Author\',
    \'AuthorURI\'   => \'Author URI\',
    \'Version\'     => \'Version\',
    \'Template\'    => \'Template\',
    \'Status\'      => \'Status\',
    \'Tags\'        => \'Tags\',
    \'TextDomain\'  => \'Text Domain\',
    \'DomainPath\'  => \'Domain Path\',
);

我一直在挖，发现this post over-on-Stack溢出提供了一种解决方法，可以硬编码和读取自定义文件头。

我意识到您希望能够动态地读写这些标题，并根据信息显示消息，这个答案并没有涵盖所有这些，但这是一个良好的开端。

假设主题中有此标题：

/*
Theme Name: Dave\'s Good Stuff 80\'s Theme
Theme URI: https://www.youtube.com/playlist?list=PL3k1BzkuZjd7F0EE6mp5LPQWxigJ-8_td
Author: Dave Romsey
Author URI: http://daveromsey.com
Description: A cool theme.
Version: 0.1.0
Tags: 
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: goto10
Key: 867-5309
*/

/**
 * Retrieve metadata from a file.
 *
 * Searches for metadata in the first 8kiB of a file, such as a plugin or theme.
 * Each piece of metadata must be on its own line. Fields can not span multiple
 * lines, the value will get cut at the end of the first line.
 *
 * If the file data is not within that first 8kiB, then the author should correct
 * their plugin file and move the data headers to the top.
 *
 * @param string $file Path to the file
 * @param array $default_headers List of headers, in the format array(\'HeaderKey\' => \'Header Name\')
 */

function wpse238644_get_file_data( $file, $default_headers) {
    $fp = fopen( $file, \'r\' );
    $file_data = fread( $fp, 8192 );
    fclose( $fp );
    $file_data = str_replace( "\\r", "\\n", $file_data );
    $all_headers = $default_headers;

    foreach ( $all_headers as $field => $regex ) {
            if (preg_match( \'/^[ \\t\\/*#@]*\' . preg_quote( $regex, \'/\' ) . \':(.*)$/mi\', $file_data, $match ) 
                    && $match[1])
                    $all_headers[ $field ] = trim(preg_replace("/\\s*(?:\\*\\/|\\?>).*/", \'\', $match[1]));
            else
                    $all_headers[ $field ] = \'\';
    }

    return $all_headers;
}


function wpse238644_get_theme_data() {
    // Customize these to fit your needs
    $file_headers = array(
        \'Name\'        => \'Theme Name\',
        \'ThemeURI\'    => \'Theme URI\',
        \'Description\' => \'Description\',
        \'Author\'      => \'Author\',
        \'AuthorURI\'   => \'Author URI\',
        \'Version\'     => \'Version\',
        \'Template\'    => \'Template\',
        \'Status\'      => \'Status\',
        \'Tags\'        => \'Tags\',
        \'TextDomain\'  => \'Text Domain\',
        \'DomainPath\'  => \'Domain Path\',
        \'Key\'         => \'Key\',
    );

    $theme_headers = wpse238644_get_file_data( get_template_directory() . \'/style.css\', $file_headers );

    $theme_key = isset( $theme_headers[\'Key\'] ) ? $theme_headers[\'Key\'] : false;

    // Do something with the key
    //var_dump( $theme_key );
}
add_action( \'init\', \'wpse238644_get_theme_data\' );