fstat() gathers the statistics of the file opened by the file pointer handle. This function is similar to the stat() function except that it operates on an open file pointer instead of a filename.
For example
PHP Code:
<?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));
?>
Returns an array with the statistics of the file; the format of the array is described in detail on the stat() manual page.