is_readable

Tells whether the filename is readable (PHP 4, PHP 5)
bool is_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 656. is_readable() example

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<?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 Appendix O, 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.

See Also

is_writable()

file_exists()

fgets()

Be careful when using is_readable on symbolic links. is_readable will return true if the file the symbolic link is pointing to is readable. The problem is that if the server does NOT allow to follow symbolic links, is_readable will still return true, but e.g. redirecting to the sybolic link will not work. For Apache, make sure that at the server, virtual host configuration level, or inside a directory container you have set Options +FollowSymLinks As an example, let's say you have at the document root directory: index.php -- the script using is_readable my_linked_page.html -- a regular HTML page my_link -- a link pointing to my_linked_page.html Now in index.php: <?php if (is_readable('my_link')) { header('Location: /my_link'); } ?> If FollowSymLinks is forbidden, this will not work, if allowed, it will.

is_readable

Tells whether the filename is readable (PHP 4, PHP 5)
bool is_readable ( string filename )

Parameters

Return Values

Examples

Example 656. is_readable() example

Notes

Related Examples ( Source code ) » is_readable

Code Examples / Notes » is_readable

Change Language

is_readable

Tells whether the filename is readable (PHP 4, PHP 5) bool is_readable ( string filename )

Parameters

Return Values

Examples

Example 656. is_readable() example

Notes

Related Examples ( Source code ) » is_readable

Code Examples / Notes » is_readable

Change Language

Tells whether the filename is readable (PHP 4, PHP 5)
bool is_readable ( string filename )