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is_readable

(PHP 3, PHP 4, PHP 5)

is_readable -- Tells whether the filename is readable

Description

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 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.

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 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()

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