(PHP 5 >= 5.1.0, PHP 7)
posix_mknod — Create a special or ordinary file (POSIX.1)
posix_mknod ( string $pathname , int $mode [, int $major = 0 [, int $minor = 0 ]] ) : bool
Creates a special or ordinary file.
pathname
The file to create
mode
This parameter is constructed by a bitwise OR between file type (one of the following constants: POSIX_S_IFREG, POSIX_S_IFCHR, POSIX_S_IFBLK, POSIX_S_IFIFO or POSIX_S_IFSOCK) and permissions.
major
The major device kernel identifier (required to pass when using S_IFCHR or S_IFBLK).
minor
The minor device kernel identifier.
Returns true on success or false on failure.
Example #1 A posix_mknod() example
<?php
$file = '/tmp/tmpfile'; // file name
$type = POSIX_S_IFBLK; // file type
$permissions = 0777; // octal
$major = 1;
$minor = 8; // /dev/random
if (!posix_mknod($file, $type | $permissions, $major, $minor)) {
die('Error ' . posix_get_last_error() . ': ' . posix_strerror(posix_get_last_error()));
}
?>
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https://www.php.net/manual/en/function.posix-mknod.php