wp_get_attachment_image_url() Gets the URL of an image attachment.
_wp_get_attachment_relative_path() Gets the attachment path relative to the upload directory.
_wp_get_image_size_from_meta() Gets the image size as array from its meta data.
wp_get_attachment_image_srcset() Retrieves the value for an image attachment's 'srcset' attribute.
wp_calculate_image_srcset() A helper function to calculate the image sources to include in a 'srcset' attribute.
wp_get_attachment_image_sizes() Retrieves the value for an image attachment's 'sizes' attribute.
wp_calculate_image_sizes() Creates a 'sizes' attribute value for an image.
wp_image_file_matches_image_meta() Determines if the image meta data is for the image source file.
wp_image_src_get_dimensions() Determines an image's width and height dimensions based on the source file.
wp_image_add_srcset_and_sizes() Adds 'srcset' and 'sizes' attributes to an existing 'img' element.
wp_lazy_loading_enabled() Determines whether to add the `loading` attribute to the specified tag in the specified context.
wp_filter_content_tags() Filters specific tags in post content and modifies their markup.
wp_img_tag_add_auto_sizes() Adds 'auto' to the sizes attribute to the image, if the image is lazy loaded and does not already include it.
wp_sizes_attribute_includes_valid_auto() Checks whether the given 'sizes' attribute includes the 'auto' keyword as the first item in the list.
wp_print_auto_sizes_contain_css_fix() Prints a CSS rule to fix potential visual issues with images using `sizes=auto`.
wp_img_tag_add_loading_optimization_attrs() Adds optimization attributes to an `img` HTML tag.
wp_img_tag_add_width_and_height_attr() Adds `width` and `height` attributes to an `img` HTML tag.
wp_img_tag_add_srcset_and_sizes_attr() Adds `srcset` and `sizes` attributes to an existing `img` HTML tag.
wp_iframe_tag_add_loading_attr() Adds `loading` attribute to an `iframe` HTML tag.
_wp_post_thumbnail_class_filter() Adds a 'wp-post-image' class to post thumbnails. Internal use only.
_wp_post_thumbnail_class_filter_add() Adds '_wp_post_thumbnail_class_filter' callback to the 'wp_get_attachment_image_attributes'
_wp_post_thumbnail_class_filter_remove() Removes the '_wp_post_thumbnail_class_filter' callback from the 'wp_get_attachment_image_attributes'
_wp_post_thumbnail_context_filter() Overrides the context used in {@see wp_get_attachment_image()}. Internal use only.
_wp_post_thumbnail_context_filter_add() Adds the '_wp_post_thumbnail_context_filter' callback to the 'wp_get_attachment_image_context'
_wp_post_thumbnail_context_filter_remove() Removes the '_wp_post_thumbnail_context_filter' callback from the 'wp_get_attachment_image_context'
img_caption_shortcode() Builds the Caption shortcode output.
gallery_shortcode() Builds the Gallery shortcode output.
wp_underscore_playlist_templates() Outputs the templates used by playlists.
wp_playlist_scripts() Outputs and enqueues default scripts and styles for playlists.
wp_playlist_shortcode() Builds the Playlist shortcode output.
wp_mediaelement_fallback() Provides a No-JS Flash fallback as a last resort for audio / video.
wp_get_audio_extensions() Returns a filtered list of supported audio formats.
wp_get_attachment_id3_keys() Returns useful keys to use to lookup data from an attachment's stored metadata.
wp_audio_shortcode() Builds the Audio shortcode output.
wp_get_video_extensions() Returns a filtered list of supported video formats.
wp_video_shortcode() Builds the Video shortcode output.
get_previous_image_link() Gets the previous image link that has the same post parent.
previous_image_link() Displays previous image link that has the same post parent.
get_next_image_link() Gets the next image link that has the same post parent.
next_image_link() Displays next image link that has the same post parent.
get_adjacent_image_link() Gets the next or previous image link that has the same post parent.
adjacent_image_link() Displays next or previous image link that has the same post parent.
get_attachment_taxonomies() Retrieves taxonomies attached to given the attachment.
get_taxonomies_for_attachments() Retrieves all of the taxonomies that are registered for attachments.
is_gd_image() Determines whether the value is an acceptable type for GD image functions.
wp_imagecreatetruecolor() Creates a new GD image resource with transparency support.
wp_expand_dimensions() Based on a supplied width/height example, returns the biggest possible dimensions based on the max width/height.
wp_max_upload_size() Determines the maximum upload size allowed in php.ini.
wp_get_image_editor() Returns a WP_Image_Editor instance and loads file into it.
wp_image_editor_supports() Tests whether there is an editor that supports a given mime type or methods.