is_dir
(PHP 4, PHP 5)
is_dir — Tells whether the filename is a directory
Description
bool is_dir
( string $filename
)
Tells whether the given filename is a directory.
Parameters
- filename
-
Path to the file. If filename is a relative filename, it will be checked relative to the current working directory.
Return Values
Returns TRUE if the filename exists and is a directory, FALSE otherwise.
範例
Example#1 is_dir() example
<?php
var_dump(is_dir('a_file.txt')) . "\n";
var_dump(is_dir('bogus_dir/abc')) . "\n";
var_dump(is_dir('..')); //one dir up
?>
The above example will output:
bool(false) bool(false) bool(true)
Notes
Note: 此函數的結果會被快取。詳細資訊請參考 clearstatcache()。
Tip
As of PHP 5.0.0 this function can also be used with some URL wrappers. Refer to List of Supported Protocols/Wrappers for a listing of which wrappers support stat() family of functionality.