PHP: is_executable

Description

bool is_executable ( string filename )

Returns TRUE if the filename exists and is executable.

is_executable() became available with Windows in PHP version 5.0.0.

Example 1. is_executable() example

<?php $file = '/home/vincent/somefile.sh'; if (is_executable($file)) { echo $file.' is executable'; } else { echo $file.' is not executable'; } ?>

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 L for a listing of which wrappers support stat() family of functionality.

See also is_file() and is_link().

User Contributed Notes
is_executable

Buuyo
06-Aug-2004 05:51


The change doesn't appear to be documented, so I thought I would mention it. In php5, as opposed to php4, you can no longer rely on is_executable to check the executable bit on a directory in 'nix. You can still use the first note's method to check if a directory is traversable: 

     @file_exists("adirectory/.");

david at littlesystems dot com dot au
02-Jun-2002 01:38


to test whether the directory /home/david is executable (regardless of whether it is readable or writeable), issue the command:

$my_isWriteable = @file_exists("/home/david/.")



the @ gets rid of the warning when this command fails when the directory is not executable.

drtebi at hotmail dot com
09-Feb-2001 10:12


[Editor's Note: This is the expected behavior (at least on most Unix-like systems).  If a directory is not executable, then you cannot get details on the files in the directory - this includes the permissions.





--zak@php.net]





This does not work on directories! 


look at this example:





if(is_file("foo/bar"))


  print "found it";





if "bar" exists, but directory "foo" is not executable, you will NOT get "found it" as result.