is_dir
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/.");
is_executable
(PHP 4, PHP 5)
is_executable — 判断给定文件名是否可执行
说明
bool is_executable
( string $filename
)
如果文件存在且可执行则返回 TRUE。
is_executable() 自 PHP 5.0.0 版起可用于 Windows。
Example#1 is_executable() 例子
<?php
$file = '/home/vincent/somefile.sh';
if (is_executable($file)) {
echo $file.' is executable';
} else {
echo $file.' is not executable';
}
?>
Note: 本函数的结果会被缓存。更多信息参见 clearstatcache()。
Tip
自 PHP 5.0.0 起本函数也可被某些 URL wrapper 使用。参考支持的协议／封装协议列表 来看哪些 wrapper 支持 stat() 系列函数的功能。
add a note
User Contributed Notesis_executable
Buuyo
06-Aug-2004 06:51
06-Aug-2004 06:51
david at littlesystems dot com dot au
02-Jun-2002 02:38
02-Jun-2002 02:38
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.