images - Read For Learn

How to get the cropped image from media library?

Get the attachment ID for the image, then get the post meta field _wp_attachment_metadata for it. This is a serialized array. The field sizes in that array contains all available image sizes. Pseudo-code: $sizes = array(); $attachment_url=”http://examle.com/wp-content-uploads/foo.png”; $attachment_dir = dirname( $attachment_url ); $attachment_id = get_attachment_id( $attachment_url ); $attachment_meta = get_post_meta( $attachment_id, ‘_wp_attachment_metadata’, TRUE ); $sizes[] … Read more

How to add “alt” attribute for image during upload at WP front-end?

The alt text is stored in the postmeta database table by WordPress, therefore we have to update the postmeta of the given attachment. The reference is done via the unique attachment ID, and the meta_key we are targeting is the _wp_attachment_image_alt. So, to set the alt text, we can do the following: update_post_meta($attach_id, ‘_wp_attachment_image_alt’, ‘Your … Read more

Featured Images for Tags?

I use this plugin for exactly the same purpose (and for other taxonomies we got that need a featured image): http://wordpress.org/plugins/gecka-terms-thumbnails/

Inserting Media to WordPress Posts

If you use “Insert by URL” the image is loaded from whatever URL your provide. It is not uploaded to your server at all, nor is any information added to the postmeta table as far as I can tell. It seems to be equivalent to simple hand-writing the HTML into the post body. You can … Read more

Attaching images to posts manually (i.e. with custom code, without the use of an API)

Attachments are posts of type attachment with the parent field set to the post ID they are attached to. The simplest way to see how this works is to look at the attachment functions in core code, /wp-includes/post.php.

Function to grab specific image IDs from media library.

Add post__in (two underscores) to your $args: $args = array( ‘post_type’ => ‘attachment’, ‘post_mime_type’ =>’image’, ‘post_status’ => ‘inherit’, ‘posts_per_page’ => -1, ‘post__in’ => array( 161, 162, 163, 164, 165, 166 ), ); Reference WP_Query on the Codex

Random home page background images with caption text

First of all I don’t think that create a custom post type only for backgrounds is a right choose: backgrond are images and images already have their post type: attachment. If you have Worpress 3.5+ you can register a custom taxonomy for attachments, call it, e.g. ‘image_scope’ : register_taxonomy(‘image_scope’, ‘attachment’, $args ); for the $args … Read more

How to create a title images for different posts?

You can simply use the featured image. Just output it where you want it to appear <?php the_post_thumbnail( $size, $attr ); ?> Use accordingly a class or a ID to style it with CSS. Take a look there: https://codex.wordpress.org/Post_Thumbnails to abilitate the featured image in your theme.

Display post thumbnail in foreach loop

echo get_the_post_thumbnail($post->ID, ‘plant-thumb’);

How to show a featured image inside a post in only 1 single category

You can use in_cateogry function to check if the current post is in your special category. And if it is, you can then display the featured image. Something like: if( in_category( ‘YOUR CATEGORY ID OR SLUG’, get_the_ID() ) ){ the_post_thumbnail(); } Obviously replace ‘YOUR CATEGORY ID OR SLUG’ with proper value.

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