is_readable — Checks whether a file is readable.
TRUE if readable; FALSE otherwise
Checks whether the specified file is readable by PHP.
Note that depending on how the script is executed
(command line, CGI, module), the test may be performed
with varying user IDs, so permissions may affect the
result of the function. Safe mode restrictions are not
taken into account. Note: The results of this function
are cached. See clearstatcache() for details.
Example 335. Check whether a
file is readable
$file = "testfile";
// open and read from file
echo ("Cannot read from file $file.");
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
This material may be distributed only subject to the terms and conditions set forth
in the Open Publication License, v1.0 or later (the latest version is presently available at
The authors of this book have elected not to choose any options under the OPL. This online book was obtained
and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4
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