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get_post_states

Retrieves an array of post states from a post.

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_wp_make_subsizes

Low-level function to create image sub-sizes.

wp_create_image_subsizes

Creates image sub-sizes, adds the new data to the image meta `sizes` array, and updates the image metadata.

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wp_update_image_subsizes

If any of the currently registered image sub-sizes are missing, create them and update the image meta data.

wp_get_missing_image_subsizes

Compare the existing image sub-sizes (as saved in the attachment meta) to the currently registered image sub-sizes, and return the difference.

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