(PHP 8 >= 8.3.0)
posix_eaccess — Determine accessibility of a file
posix_eaccess() checks the effective user's permission of a file
filenameThe name of a file to be tested.
flags
A mask consisting of one or more of POSIX_F_OK,
POSIX_R_OK, POSIX_W_OK and
POSIX_X_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.
| 版本 | 说明 |
|---|---|
| 8.3.0 | Checks the effective user/group for a file, differing from posix_access() which checks from the real user/group. |
示例 #1 posix_eaccess() example
This example will check if the $file is readable and writable, otherwise will print an error message.
<?php
$file = 'some_file';
if (posix_eaccess($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);
}
?>