PHP umask() 函数

返回当前的 umask：

<?php
$file = "test.txt";
echo (umask());
?>

定义和用法

umask() 函数更改文件的文件权限。

该函数将 PHP 的 umask 设置为面具&0777 并返回旧的 umask。

umask( mask)

Parameter	Description
mask	Optional. Specifies the new permissions. Default is 0777 The mask parameter consists of four numbers: The first number is always zero The second number specifies permissions for the owner The third number specifies permissions for the owner's user group The fourth number specifies permissions for everybody else Possible values (to set multiple permissions, add up the following numbers): 1 = execute permissions 2 = write permissions 4 = read permissions

Parameter

Description

mask

Optional. Specifies the new permissions. Default is 0777

The mask parameter consists of four numbers:

Possible values (to set multiple permissions, add up the following numbers):

返回值：	如果不带任何参数调用 umask()，它将返回当前的 umask，否则返回旧的 umask
PHP 版本：	4.0+