file_exists
(PHP 4, PHP 5)
file_exists — Checks whether a file or directory exists
Description
Checks whether a file or directory exists.
Parameters
- filename
-
Path to the file or directory.
On windows, use //computername/share/filename or \\computername\share\filename to check files on network shares.
Return Values
Returns TRUE if the file or directory specified by filename exists; FALSE otherwise.
This function returns FALSE for files inaccessible due to safe mode restrictions. However these files still can be included if they are located in safe_mode_include_dir.
Note: The check is done using the real UID/GID instead of the effective one.
Παραδείγματα
Example#1 Testing whether a file exists
<?php
$filename = '/path/to/foo.txt';
if (file_exists($filename)) {
echo "The file $filename exists";
} else {
echo "The file $filename does not exist";
}
?>
Notes
Note: Τα αποτελέσματα αυτής της συνάρτησης έχουν γίνει cache. Δείτε την clearstatcache() για περισσότερες πληροφορίες.
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.