is_readable — Tells whether the filename is readable
Description
boolis_readable
( string$filename
)
Tells whether the filename is readable.
Parameters
filename
Path to the file.
Return Values
Returns TRUE if the file or directory specified by
filename
exists and is readable, FALSE otherwise.
Examples
Example #1 is_readable() example
<?php $filename = 'test.txt'; if (is_readable($filename)) { echo 'The file is readable'; } else { echo 'The file is not readable'; } ?>
Notes
Keep in mind that PHP may be accessing the file as the user
id that the web server runs as (often 'nobody'). Safe mode
limitations are not taken into account before PHP 5.1.5.
Note: The results of this
function are cached. See clearstatcache() for
more details.
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.
Note:
The check is done using the real UID/GID instead of the effective one.
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