posix_access
(PHP 5 >= 5.1.0)
posix_access — Determine accessibility of a file
설명
bool posix_access
( string $file
[, int $mode
] )
posix_access() checks the user's permission of a file.
매개변수
- file
-
The name of the file to be tested.
- mode
-
A mask consisting of one or more of POSIX_F_OK, POSIX_R_OK, POSIX_W_OK and POSIX_X_OK. Defaults to POSIX_F_OK.
POSIX_R_OK, POSIX_W_OK and POSIX_X_OK request checking whether the file exists and has read, write and execute permissions, respectively. POSIX_F_OK just requests checking for the existence of the file.
반환값
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.
예제
Example#1 posix_access() example
This example will check if the $file is readable and writable, otherwise will print an error message.
<?php
$file = 'some_file';
if (posix_access($file, POSIX_R_OK | POSIX_W_OK)) {
echo 'The file is readable and writable!';
} else {
$error = posix_get_last_error();
echo "Error $error: " . posix_strerror($error);
}
?>
주의
Note: 안전 모드일때, PHP는 조작하려는 파일이나 디렉토리가 실행중인 스크립트와 같은 UID(owner)인지 확인합니다.