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Where do I find the attachment metadata in WordPress?
The file MUST be in the uploads directory. See wp_upload_dir (). This function returns array of attachment metadata in the format required by wp_update_attachment_metadata (). The elements returned in the array are: ( string) Horizontal size of image attachment, in pixels.
When to use WP _ generate _ attachment _ metadata ( )?
Thumbnail and intermediate sizes of the image, and [“sizes”] elements in the array returned by this function, are only generated when the intermediate size is smaller than the size of the image. The function should be used in conjunction with wp_update_attachment_metadata ().
How to generate metadata for an image attachment?
Generate attachment meta data and create image sub-sizes for images. (int) (Required) Attachment Id to process. (string) (Required) Filepath of the Attached image. (array) Metadata for attachment. This function generates metadata for an image attachment.
How is meta data retrieved in WordPress.com?
The image meta data is retrieved by attachment post ID. In some cases the post IDs may change. For example when the website is exported and imported at another website. Then the attachment post IDs that are in post_content for the exported website may not match the same attachments at the new website.
How to retrieve an image attachment’s alt text?
So having the attachment’s Id, I was able to get the alt text with this code: To add to Mike’s answer someone might find this useful. You might need to get the specific ID of the attachment, so you can do so by passing the Post ID to get_post_thumbnail_id example:
How to get the post META array in WordPress?
If the value of the $key parameter is falsy get_post_meta will return the entire post meta array, even if $single is set to true. for example: get_post_meta( $post_id, FALSE, TRUE); //Returns all the post meta fields as an array.