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 $size
) : bool
Takes the filepointer, handle, and truncates the file to
length, size.
Parameters
handleThe file pointer.
Note:
The
handlemust be open for writing.sizeThe size to truncate to.
Note:
If
sizeis larger than the file then the file is extended with null bytes.If
sizeis smaller than the file then the file is truncated to that size.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example #1 File truncation example
<?php$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.
