images

Add custom field to image editor

To add a custom field to attachments, place the following code in your functions.php. add_filter(‘attachment_fields_to_edit’, ‘edit_media_custom_field’, 11, 2 ); add_filter(‘attachment_fields_to_save’, ‘save_media_custom_field’, 11, 2 ); function edit_media_custom_field( $form_fields, $post ) { $form_fields[‘custom_field’] = array( ‘label’ => ‘Custom Field’, ‘input’ => ‘text’, ‘value’ => get_post_meta( $post->ID, ‘_custom_field’, true ) ); return $form_fields; } function save_media_custom_field( $post, $attachment … Read more

How do I change the description of the same image which is to be found in multiple instances?

Plugin idea #1 When we insert an image into the editor, the plugin automatically modifies the caption and the alt attribute to: Then on the front-end the image caption is fetched for the corresponding image attachment, based on the attachment_729 string and replaces the ###ALT### and ###CAPTION### dummy values. So when we want to modify … Read more

Extract image src from a post and send it to an external form

There is no built-in way to extract an image/image-src from the post body. If the images are attachments you can do it with get_children or WP_Query, and wp_get_attachment_image_src. function get_image_src_from_content_101578($content) { global $post; $args = array( ‘post_parent’ => $post->ID, ); $images = get_children($args); foreach ($images as $img) { var_dump(wp_get_attachment_image_src($img->ID)); } } add_action(‘the_content’,’get_image_src_from_content_101578′); You could also … Read more

Caption in Page adding unwanted 10px to width

Here’s what you can do. There’s a filter at the beginning of the shortcode execution function for the front end that will let you hijack the captions. Returning a non-empty value will stop execution of the shortcode, so if you just process the shortcode the way you want it to be processed and return that … Read more

WordPress function: limit size, only jpg, jpeg, limit of uploaded files per account

You cannot check the image before uploading, as WordPress is a serverside script. However, before inserting the image in the Media library, you have different options, as I explained in this answer, with filtering wp_handle_upload_prefilter. In your case, the function filtering the wp_handle_upload_prefilter would be something like this: add_filter(‘wp_handle_upload_prefilter’, ‘f711_image_size_prevent’); function f711_image_size_prevent($file) { // get … Read more

How to display a shortcode caption somewhere other than the_content

Try this: $caption_info = array(); add_filter( ‘img_caption_shortcode’, ‘capture_caption’, 10, 3 ); function capture_caption( $blank = ”, $attr, $content ) { global $caption_info; $caption_info[] = array(‘attr’ => $attr, ‘content’ => $content ); return ‘ ‘; } It will save info from all captions into global $caption_info variable and suppress their display in content (space is returned … Read more

Making images from single.php pointing to an attachment .php template

If I understand you correctly, you need to link your images not to the file, but to the attachment template (attachment.php). If so, then try the following code in your single.php: <?php if( has_post_thumbnail() ) { $attachment_page_url=””; $attachment_page_url = get_attachment_link( get_post_thumbnail_id() ); ?> <a href=”<?php echo $attachment_page_url; ?>” class=”featured-image”> <?php the_post_thumbnail(); ?> </a> <?php } … Read more

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