I think your code is very close, try to use wp_get_attachment_image_src() instead: function thumb_medium( $atts, $content = null ) { // return wp_get_attachment_url( get_post_thumbnail_id( $post_id, ‘medium’) ); global $post; $thumb_url = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), ‘medium’ )[0]; if ($thumb_url) { return $thumb_url; } } add_shortcode(“get_urlthumb”, “thumb_medium”);
You got everything you need, simply build your own img-element like this: if ( has_post_thumbnail() ) { $class=”lazy attachment-thumbnail-400-300″; //Get thumbnail source $thumb = wp_get_attachment_image_src(get_post_thumbnail_id($post->ID), ‘thumbnail-400-300’); $src = $thumb[‘0’]; $placeholder = “//placehold.it/400×300/eee/222/&text=+”; echo ‘<img src=”‘.$placeholder.'” data-original=”‘.$src.'” class=”‘.$class.'” />’; } Besides that, your main performance issue might be generating a new placeholder every time you want … Read more
Try using the_post_thumbnail WP function, inside your <li id=”news-single”> markup definition: <li id=”news-single”> <a href=”https://wordpress.stackexchange.com/questions/228220/<?php echo esc_url( $item->get_permalink() ); ?>” target=”_blank” title=”<?php printf( __( ‘Posted %s’, ‘my-text-domain’ ), $item->get_date(‘j F Y | g:i a’) ); ?>”> <?php echo esc_html( $item->get_title() ); ?> </a> <?php // This is the piece of code that you should add: … Read more
wp_generate_attachment_metadata() uses get_intermediate_image_sizes() to get the sizes to work on, which makes them filterable via intermediate_image_sizes. Additionally, you can filter them after cleanup with intermediate_image_sizes_advanced, the result should be the same.
If you want to get the post thumbnail URL, you can use get_the_post_thumbnail_url(): <?php $image_path=”images/club/” . $opposition->post_name . ‘.jpg’; // relative to the root directory if ( @file_exists( ABSPATH . $image_path ) ) { // Check the unique image first. $thumbnail = home_url( “https://wordpress.stackexchange.com/” . $image_path ); } elseif ( has_post_thumbnail( $opposition ) ) { … Read more
Facebook scrapes your pages for images to go along with the post you share. When it finds an image on the page it will use that. To specify which image exactly you have to use Open Graph tags in the head part of you html page. The og:image tag in particular: <meta property=”og:image” content=”http://graphics.myfavnews.com/images/logo-100×100.jpg” /> … Read more
When the first image is a WordPress image attachment. in 3.6, there is an easier way. function get_first_image_medium_size_url($post_id) { if(!$images = get_attached_images($post_id)) return false; $first_image = current($images); if(!$src = wp_get_attachment_image_src($first_image->ID,’medium’)) return false; $medium_url = current($src); return $medium_url; } get_attached_images is available in 3.6. wp_get_attachment_image_src is available since 2.5.0 which will automatically get or scale the … Read more
Don’t know why you want to do it when there’s update_post_thumbnail_cache() in WordPress and set expire headers on server side. But you can try this in your functions.php: add_filter(‘wp_get_attachment_image_src’, function($img, $id, $size, $icon) { $img[0] = $img[0] . ‘?v={$some_version}’; return $img; }, PHP_INT_MAX, 4);
(this should be a comment, but my reputation is too low) Setting jpeg_quality will not disable compression because it does not disable processing. JPEGs will be always compressed, and they are almost never lossless, not even at 100 – it does not stand for “100% original quality”. What happens here, is that WordPress’s default image … Read more
You are probably missing ImageMagick (PHP extension). Install it and the JPG artifacts will be gone.