I have a WordPress installation that sometimes uses long and lengthy posts delimited by the <!--more--> tag. However on my RSS feeds, the entire post is shown.

Is there a way, aside from custom tags, to delimit how much is shown in a WordPress Feed or just show enough until the "More" tag?


You can select between Full text and Summary in the Reading settings:

settings menu


If you select the Summary, then

a) To control the number of words in the feed summary you can use:

function custom_excerpt_length( $num_words ){
    return 30; // number of words to show

The default number of words in the summary is 55.

b) If you want to use <!--more--> in the post content to define the feed summary, you can use the following:

add_filter( 'the_content', 'custom_content_feed' );
function custom_content_feed( $content ){
    if( is_feed() ){
        // <!--more--> used in the post content: 
        if( strpos( $content, '<span id="more-') !== FALSE ){
            // remove the excerpt length limit
            add_filter( 'excerpt_length', 'custom_long_excerpt_length' ); 
            // get the content before <!--more-->
            $content = stristr( $content, '<span id="more-', TRUE );
            // add the default 'read more' symbols at the end:
            $excerpt_more = apply_filters( 'excerpt_more', ' ' . '[&hellip;]' );
            $content .= $excerpt_more;
    return $content;
function custom_long_excerpt_length( $num_words ){
    return 99999;

c) You can also use a) and b) together.

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