ftruncate
Truncates a file to a given length
Description
bool ftruncate(resource $stream
, int $size
)
Parameters
-
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.
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.