Set a default featured image

There’s a plugin that sounds like it does what you need:

https://www.ads-software.com/plugins/wp-auto-featured-image/

Thanks Alex. I have tried to use this plugin but it seems to have some bugs in the latest version. Is there an alternative?

I’ve come up with this, but its obviously not quite right – not sure also at what point it applies the image

add_filter('post_thumbnail_html', 'wt_modify_post_thumbnail_html', 99, 5);
function wt_modify_post_thumbnail_html() {
if ( has_post_thumbnail() &&  get_post_type() == 'testimonials' )  {
   the_post_thumbnail();
} else {
    echo '<img src="' . get_bloginfo( 'stylesheet_directory' ) . '/images/transparent.png" />';
}
}

Hello powerj,

The filter applies the image when there was no featured image is applied post in post type=”testimonials”.

Thanks

It doesn’t work though …

filter should return the results, not echo it;
https://codex.www.ads-software.com/Plugin_API

try to modifiy your code accordingly:

add_filter('post_thumbnail_html', 'wt_modify_post_thumbnail_html');
function wt_modify_post_thumbnail_html( $html ) {
if ( !$html &&  get_post_type() == 'testimonials' )  $html = '<img src="' . get_bloginfo( 'stylesheet_directory' ) . '/images/transparent.png" />';
  return $html;
}

related https://justintadlock.com/archives/2012/07/05/how-to-define-a-default-post-thumbnail