(PHP 4, PHP 5, PHP 7, PHP 8)
fileperms — 取得文件的權(quán)限
$filename): int取得文件的權(quán)限。
filename文件的路徑。
以數(shù)字模式返回文件的訪問權(quán)限。
Returns the file's permissions as a numeric mode.
Lower bits of this mode
are the same as the permissions expected by chmod(),
however on most platforms the return value will also include information on
the type of file given as filename. The examples
below demonstrate how to test the return value for specific permissions and
file types on POSIX systems, including Linux and Mac OS X.
For local files, the specific return value is that of the
st_mode member of the structure returned by the C
library's stat() function. Exactly which bits are set
can vary from platform to platform, and looking up your specific platform's
documentation is recommended if parsing the non-permission bits of the
return value is required.
示例 #1 以八進(jìn)制的形式顯示文件的權(quán)限
<?php
echo substr(sprintf('%o', fileperms('/tmp')), -4);
echo substr(sprintf('%o', fileperms('/etc/passwd')), -4);
?>
以上例程會(huì)輸出：
1777 0644
示例 #2 輸出全部權(quán)限
<?php
$perms = fileperms('/etc/passwd');
if (($perms & 0xC000) == 0xC000) {
// Socket
$info = 's';
} elseif (($perms & 0xA000) == 0xA000) {
// Symbolic Link
$info = 'l';
} elseif (($perms & 0x8000) == 0x8000) {
// Regular
$info = '-';
} elseif (($perms & 0x6000) == 0x6000) {
// Block special
$info = 'b';
} elseif (($perms & 0x4000) == 0x4000) {
// Directory
$info = 'd';
} elseif (($perms & 0x2000) == 0x2000) {
// Character special
$info = 'c';
} elseif (($perms & 0x1000) == 0x1000) {
// FIFO pipe
$info = 'p';
} else {
// Unknown
$info = 'u';
}
// Owner
$info .= (($perms & 0x0100) ? 'r' : '-');
$info .= (($perms & 0x0080) ? 'w' : '-');
$info .= (($perms & 0x0040) ?
(($perms & 0x0800) ? 's' : 'x' ) :
(($perms & 0x0800) ? 'S' : '-'));
// Group
$info .= (($perms & 0x0020) ? 'r' : '-');
$info .= (($perms & 0x0010) ? 'w' : '-');
$info .= (($perms & 0x0008) ?
(($perms & 0x0400) ? 's' : 'x' ) :
(($perms & 0x0400) ? 'S' : '-'));
// World
$info .= (($perms & 0x0004) ? 'r' : '-');
$info .= (($perms & 0x0002) ? 'w' : '-');
$info .= (($perms & 0x0001) ?
(($perms & 0x0200) ? 't' : 'x' ) :
(($perms & 0x0200) ? 'T' : '-'));
echo $info;
?>
以上例程會(huì)輸出：
-rw-r--r--
失敗時(shí)拋出E_WARNING警告。
注意: 此函數(shù)的結(jié)果會(huì)被緩存。參見 clearstatcache() 以獲得更多細(xì)節(jié)。
自 PHP 5.0.0 起, 此函數(shù)也用于某些 URL 包裝器。請(qǐng)參見 支持的協(xié)議和封裝協(xié)議以獲得支持 stat() 系列函數(shù)功能的包裝器列表。