(PHP 4, PHP 5, PHP 7, PHP 8)
ftruncate — Truncates a file to a given length
Takes the filepointer, stream
, and truncates the file to
length, size
.
stream
The file pointer.
Note:
The
stream
must be open for writing.
size
The size to truncate to.
Note:
If
size
is larger than the file then the file is extended with null bytes.If
size
is smaller than the file then the file is truncated to that size.
Example #1 File truncation example
<?php$filename = 'lorem_ipsum.txt';$handle = fopen($filename, 'r+');ftruncate($handle, rand(1, filesize($filename)));rewind($handle);echo fread($handle, filesize($filename));fclose($handle);?>
Note:
The file pointer is not changed.