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(PECL xattr >= 0.9.0)
xattr_list — Get a list of extended attributes
$filename
[, int $flags
= 0
] )This functions gets a list of names of extended attributes of a file.
扩展的属性有两种 不同的命名空间:user
和 root。user 命名空间对所有用户均有效,而 root
命名空间仅对拥有 root 权限的用户有效。
xattr 默认在 user 命名空间上操作,但可使用
flags
参数进行更改。
filename
The path of the file.
flags
XATTR_DONTFOLLOW | Do not follow the symbolic link but operate on symbolic link itself. |
XATTR_ROOT | Set attribute in root (trusted) namespace. Requires root privileges. |
This function returns an array with names of extended attributes.
Example #1 Prints names of all extended attributes of file
<?php
$file = 'some_file' ;
$root_attributes = xattr_list ( $file , XATTR_ROOT );
$user_attributes = xattr_list ( $file );
echo "Root attributes: \n" ;
foreach ( $root_attributes as $attr_name ) {
printf ( "%s\n" , $attr_name );
}
echo "\n User attributes: \n" ;
foreach ( $attributes as $attr_name ) {
printf ( "%s\n" , $attr_name );
}
?>