#WordPress add_image_sizeで追加した画像サイズを投稿画面で選べるようにする

gistfile1.php

<?php
function additional_image_size_names_choose($sizes){
	global $_wp_additional_image_sizes;
	
	if ( $_wp_additional_image_sizes ) {
		foreach ( $_wp_additional_image_sizes as $key => $value ) {
			if ( !$sizes[$key] )
				$sizes[$key] = $key;
		}
	}
	
	return $sizes;
}
add_filter('image_size_names_choose','additional_image_size_names_choose');