(PHP 4, PHP 5)
rewind — Rewind the position of a file pointer
Sets the file position indicator for handle to the beginning of the file stream.
Note: If you have opened the file in append ("a" or "a+") mode, any data you write to the file will always be appended, regardless of the file position.
The file pointer must be valid, and must point to a file successfully opened by fopen().
Returns TRUE on success or FALSE on failure.