是的，有“the\\u content”filter. 看到了吗codex.

例如：

add_filter( \'the_content\', \'my_the_content_filter\', 20 );

/**
 * Add a test to the end of every post page.
 */
function my_the_content_filter( $content ) {

    if ( is_singular(\'hotels\') ){
        //If a single post is being viewed, add something
        //Or get the value of a custom field and append it
        $post_id = get_the_ID();
        $custom_field_value = get_post_meta($post_id, \'Address\', true);
        $content .= $custom_field_value;
    }
    // Make sure you returns the content, edited or otherwise
    return $content;
}