Php/docs/function.ftruncate
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ftruncate
(PHP 4, PHP 5, PHP 7)
ftruncate — Truncates a file to a given length
Description
ftruncate
( resource $handle
, int $size
) : bool
Takes the filepointer, handle
, and truncates the file to
length, size
.
Parameters
handle
The file pointer.
Note:
The
handle
must be open for writing.size
The size to truncate to.
Note:
If
size
is larger than the file then the file is extended with null bytes.If
size
is smaller than the file then the file is truncated to that size.
Return Values
Returns TRUE
on success or FALSE
on failure.
Examples
Example #1 File truncation example
<?php$filename = 'lorem_ipsum.txt';$handle = fopen($filename, 'r+');ftruncate($handle, rand(1, filesize($filename)));rewind($handle);echo fread($handle, filesize($filename));fclose($handle);?>
Notes
Note:
The file pointer is not changed.