wp_cache_delete - Documentation

WordPress Version: 4.4

/**
 * Removes the cache contents matching key and group.
 *
 * @since 2.0.0
 *
 * @see WP_Object_Cache::delete()
 * @global WP_Object_Cache $wp_object_cache Object cache global instance.
 *
 * @param int|string $key   What the contents in the cache are called.
 * @param string     $group Optional. Where the cache contents are grouped. Default empty.
 * @return bool True on successful removal, false on failure.
 */
function wp_cache_delete($key, $group = '')
{
    global $wp_object_cache;
    return $wp_object_cache->delete($key, $group);
}

WordPress Version: 4.3

/**
 * Removes the cache contents matching key and group.
 *
 * @since 2.0.0
 *
 * @global WP_Object_Cache $wp_object_cache
 *
 * @param int|string $key What the contents in the cache are called
 * @param string $group Where the cache contents are grouped
 * @return bool True on successful removal, false on failure
 */
function wp_cache_delete($key, $group = '')
{
    global $wp_object_cache;
    return $wp_object_cache->delete($key, $group);
}

WordPress Version: 3.7

/**
 * Removes the cache contents matching key and group.
 *
 * @since 2.0.0
 * @uses $wp_object_cache Object Cache Class
 * @see WP_Object_Cache::delete()
 *
 * @param int|string $key What the contents in the cache are called
 * @param string $group Where the cache contents are grouped
 * @return bool True on successful removal, false on failure
 */
function wp_cache_delete($key, $group = '')
{
    global $wp_object_cache;
    return $wp_object_cache->delete($key, $group);
}