预定义常量

下列常量由此扩展定义,且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

XATTR_ROOT (int)
Set attribute in root (trusted) namespace. Requires root privileges.
XATTR_DONTFOLLOW (int)
Do not follow the symbolic link but operate on symbolic link itself.
XATTR_CREATE (int)
Function will fail if extended attribute already exists.
XATTR_REPLACE (int)
Function will fail if extended attribute doesn't exist.
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