WordPress Version: 4.6
/**
* Retrieve a single post, based on post ID.
*
* Has categories in 'post_category' property or key. Has tags in 'tags_input'
* property or key.
*
* @since 1.0.0
* @deprecated 3.5.0 Use get_post()
* @see get_post()
*
* @param int $postid Post ID.
* @param string $mode How to return result, either OBJECT, ARRAY_N, or ARRAY_A.
* @return WP_Post|null Post object or array holding post contents and information
*/
function wp_get_single_post($postid = 0, $mode = OBJECT)
{
_deprecated_function(__FUNCTION__, '3.5.0', 'get_post()');
return get_post($postid, $mode);
}