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Function to add featured image to RSS feed
<?php
add_filter( 'the_content', 'featured_image_in_feed' );
function featured_image_in_feed( $content ) {
global $post;
if( is_feed() ) {
if ( has_post_thumbnail( $post->ID ) ){
$output = get_the_post_thumbnail( $post->ID, 'medium', array( 'style' => 'float:right; margin:0 0 10px 10px;' ) );
$content = $output . $content;
}
}
return $content;
}
?>
@sheetal-mandyal

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sheetal-mandyal commented Jul 19, 2017

it didn't worked for me :(

@idarek

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idarek commented Aug 5, 2017

Is it still valid? are this will work straight away or need to wait 24h for rss readers to refresh?

@ibda347

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ibda347 commented Oct 25, 2017

replace
$output = get_the_post_thumbnail( $post->ID, 'medium', array( 'style' => 'float:right; margin:0 0 10px 10px;' ) );
with this
$output = the_post_thumbnail( $post->ID, 'medium', array( 'style' => 'float:right; margin:0 0 10px 10px;' ) );

@marekale

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marekale commented Nov 9, 2017

I would rather use 'the_content_feed' filter, and 'the_excerpt_rss' filter to make it work with excerpts as well. Then there's no need for is_feed() check, because filters are specific for feed. And we need to check if the feed is for comments or for posts. We don't need post's featured image in comments feed.

<?php
add_filter( 'the_content_feed', 'featured_image_in_feed' );
add_filter( 'the_excerpt_rss', 'featured_image_in_feed' );
function featured_image_in_feed( $content ) {
    global $post, $wp_query;
    if( ! $wp_query->is_comment_feed) { 
        if ( has_post_thumbnail( $post->ID ) ){
            $output = get_the_post_thumbnail( $post->ID, 'medium', array( 'style' => 'float:right; margin:0 0 10px 10px;' ) );
            $content = $output . $content;
        }
    }
    return $content;
}
?>
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