< Complete PHP Filesystem Reference
Definition and Usage
The ftruncate() function truncates an open file to the specified length.
Returns TRUE on success, or FALSE on failure.
Syntax
ftruncate(file,size)
| Parameter | Description |
|---|---|
| file | Required. Specifies the open file to truncate |
| size | Required. Specifies the new file size |
Example
<?php
//check filesize
echo filesize("test.txt");
echo "<br />";
$file = fopen("test.txt", "a+");
ftruncate($file,100);
fclose($file);
//Clear cache and check filesize again
clearstatcache();
echo filesize("test.txt");
?>
The output of the code above will be:
792
100
< Complete PHP Filesystem Reference