In order for wp_generate_attachment_metadata() to work properly in that it creates a thumbnail and other intermediate/image sizes like medium and large, the image attachment/post data must have the proper MIME type (post_mime_type), and despite you did set it in your $attachment array (the post data), there’s a problem with this part in your code: $wp_filetype … Read more
Saving WordPress generated thumbnails in a subdirectory
That is a huge difference! I think this is your issue… Any time an image is uploaded, if that image was saved in the Adobe RGB color space, then the image does not get loaded correctly for resizing. Thumbnails are saved in the default color space, which is sRGB. By failing to perform the color … Read more
Are the new image dimensions registered in the database in any way or does the resizing just occur in the uploads directory? No, the image size system is similar to the post type system, sizes are registered at runtime, not in the database. The size of some sizes are stored in the database as they’re … Read more
From this comment: Sry, i forgot it, but i want size of 645×445, exactly, and that image dont have it. The width of it is 588px. Look: img201.imageshack.us/img201/4728/40405258.png WordPress need make a zoom on it. WordPress does not zoom. It only crops. If you want an image to have a custom intermediate size, then you … Read more
From https://make.wordpress.org/core/2012/12/06/wp_image_editor-is-incoming/ : Imagick support requires Imagick 2.2.0+ compiled against Imagemagick 6.2.9+, for full support. If the required functions aren’t available, WordPress will default back to GD. If you can, create a PHP file somewhere on your server with this content: <?php phpinfo(); ?>. Then load the page and see if there is a section … Read more
Just filter admin_post_thumbnail_html and append your checkbox HTML: add_filter( ‘admin_post_thumbnail_html’, ‘wpse_71501_thumbnail_options’ ); function wpse_71501_thumbnail_options( $html ) { return $html . <<<html <p> <label for=”big_thumbnail”> <input id=”big_thumbnail” name=”big_thumbnail” type=”checkbox” /> Use big thumbnail </label> </p> html; }
To answer your first question, the first chunk of code is specifically for adding more custom thumbnail sizes. Don’t let the word “thumbnail” trick you, in fact I use the function mentioned above to register large images that fit in very specific places in themes such as custom sized banners and things like that. In … Read more
Demo Plugin – Fixed Size Here’s one suggestion as a demo plugin (PHP 5.4+): <?php /* Plugin Name: Custom Playlist Thumb Size */ namespace WPSE238646\PlaylistThumbSize; add_shortcode( ‘playlist’, function( $atts = [], $content=”” ) { add_filter( ‘wp_get_attachment_image_src’, __NAMESPACE__ . ‘\\src’ , 10, 3 ); $out = wp_playlist_shortcode( $atts, $content ); remove_filter( ‘wp_get_attachment_image_src’, __NAMESPACE__ . ‘\\src’ ); … Read more
The first argument that get_previous_post and get_next_post is $in_same_cat. WordPress is looking for post of the same type in the current posts category. If your custom post type doesn’t support the category taxonomy, both functions are likely to return nothing for the previous and next post. Try calling both functions without arguments for your custom … Read more