streamWrapper::stream_truncate
(PHP 5 >= 5.4.0, PHP 7)
streamWrapper::stream_truncate — Truncate stream
Description
public streamWrapper::stream_truncate ( int $new_size ) : bool
Will respond to truncation, e.g., through ftruncate().
Parameters
-  new_size
-  The new size. 
Return Values
 Returns true on success or false on failure. 
See Also
- ftruncate() - Truncates a file to a given length
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    https://www.php.net/manual/en/streamwrapper.stream-truncate.php