(PHP 4, PHP 5, PHP 7, PHP 8)
fstat — Gets information about a file using an open file pointer
$stream): array|false
   Gathers the statistics of the file opened by the file
   pointer stream. This function is similar to the
   stat() function except that it operates
   on an open file pointer instead of a filename.
  
   Returns an array with the statistics of the file; the format of the array
   is described in detail on the stat() manual page.
   Returns false on failure.
  
Example #1 fstat() example
<?php
// open a file
$fp = fopen("/etc/passwd", "r");
// gather statistics
$fstat = fstat($fp);
// close the file
fclose($fp);
// print only the associative part
print_r(array_slice($fstat, 13));
?>
The above example will output something similar to:
Array
(
    [dev] => 771
    [ino] => 488704
    [mode] => 33188
    [nlink] => 1
    [uid] => 0
    [gid] => 0
    [rdev] => 0
    [size] => 1114
    [atime] => 1061067181
    [mtime] => 1056136526
    [ctime] => 1056136526
    [blksize] => 4096
    [blocks] => 8
)
Note: This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.