Forcing Function to Return instead of Echo?

I’m trying to add a link to the bottom of my wordpress RSS Feed but my getCustomField(‘Affiliate Link’) function is echoing the value instead of returning it… how do I get it to return instead?

    function modRSS($content) {
       global $post;

       if ( has_post_thumbnail( $post->ID ) ){
          $content = '<div>' . get_the_post_thumbnail( $post->ID, 'full', array( 'style' => 'margin-bottom: 15px;' ) ) . '</div>' . $content;

       $content = $content . '<a href="' . getCustomField('Affiliate Link') . '">Peek</a>';

       return $content;

    add_filter('the_excerpt_rss', 'modRSS');
    add_filter('the_content_feed', 'modRSS');

See if it is possible to add default parameter in your function getCustomField(‘Affiliate Link’) like

function getCustomField($mylink, $return = false){
    // do your stuff here
        return $yourValue;
        echo $yourValue;

and then call your function like getCustomField(‘Affiliate Link’, true)

Hope this helps

Thanks for the reply! I don’t know php too well, just trying to fix this one thing but what would I place where it says “yourValue”?

Can you provide the getCustomField function you have so we can see it? Otherwise we are just guessing as to what the function looks like.