Using WordPress ‘feed_content_type’ PHP filter

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The feed_content_type WordPress PHP filter allows you to modify the content type of a specific feed type in WordPress.

Usage

add_filter( 'feed_content_type', 'my_custom_feed_content_type', 10, 2 );

function my_custom_feed_content_type( $content_type, $type ) {
    // your custom code here
    return $content_type;
}

Parameters

  • $content_type (string) – Content type indicating the type of data that a feed contains.
  • $type (string) – Type of feed. Possible values include ‘rss’, ‘rss2’, ‘atom’, and ‘rdf’.

More information

See WordPress Developer Resources: feed_content_type

Examples

Change Atom Feed Content Type

Modify the content type for Atom feeds to ‘application/atom+xml’.

add_filter( 'feed_content_type', 'change_atom_feed_content_type', 10, 2 );

function change_atom_feed_content_type( $content_type, $type ) {
    if ( 'atom' === $type ) {
        return 'application/atom+xml';
    }
    return $content_type;
}

Change RSS2 Feed Content Type

Modify the content type for RSS2 feeds to ‘application/rss+xml’.

add_filter( 'feed_content_type', 'change_rss2_feed_content_type', 10, 2 );

function change_rss2_feed_content_type( $content_type, $type ) {
    if ( 'rss2' === $type ) {
        return 'application/rss+xml';
    }
    return $content_type;
}

Set a Custom Content Type for RDF Feeds

Set a custom content type for RDF feeds to ‘application/my-custom-rdf+xml’.

add_filter( 'feed_content_type', 'set_custom_rdf_feed_content_type', 10, 2 );

function set_custom_rdf_feed_content_type( $content_type, $type ) {
    if ( 'rdf' === $type ) {
        return 'application/my-custom-rdf+xml';
    }
    return $content_type;
}

Modify Content Type for All Feed Types

Add a custom suffix to the content type for all feed types.

add_filter( 'feed_content_type', 'modify_all_feed_content_types', 10, 2 );

function modify_all_feed_content_types( $content_type, $type ) {
    return $content_type . '; custom_suffix';
}

Remove Custom Suffix from Content Type

Remove a custom suffix from the content type for a specific feed type (e.g., ‘rss’).

add_filter( 'feed_content_type', 'remove_custom_suffix_from_content_type', 10, 2 );

function remove_custom_suffix_from_content_type( $content_type, $type ) {
    if ( 'rss' === $type ) {
        return str_replace( '; custom_suffix', '', $content_type );
    }
    return $content_type;
}