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.