Retrieve information about a file - Справочник: PHP5.4

public array streamWrapper::url_stat ( string $path , int $flags )

This method is called in response to all stat() related functions, such as:

path

The file path or URL to stat. Note that in the case of a URL, it must be a :// delimited URL. Other URL forms are not supported.

flags

Holds additional flags set by the streams API. It can hold one or more of the following values OR'd together.

Flag	Description
STREAM_URL_STAT_LINK	For resources with the ability to link to other resource (such as an HTTP Location: forward, or a filesystem symlink). This flag specified that only information about the link itself should be returned, not the resource pointed to by the link. This flag is set in response to calls to lstat(), is_link(), or filetype().
STREAM_URL_STAT_QUIET	If this flag is set, your wrapper should not raise any errors. If this flag is not set, you are responsible for reporting errors using the trigger_error() function during stating of the path.

Should return as many elements as stat() does. Unknown or unavailable values should be set to a rational value (usually 0).

Вызывает ошибку уровня E_WARNING, если вызов к этому методу не удался (например, не реализован).

Замечание:
Свойство streamWrapper::$context будет обновлено, если корректный контекст был передан в вызываемую функцию.