The ftruncate() function truncates an open file to a specified length. The function returns TRUE on success, or FALSE on failure.
Syntax
ftruncate(file_pointer, size)
Parameters
file_pointer − The file pointer must be open for writing to truncate.
size − The file size to truncate to.
Return
The ftruncate() function returns.
- TRUE on success, or
- FALSE on failure.
Example
<?php echo filesize("new.txt"); echo " "; $file_pointer = fopen("new.txt", "a+"); ftruncate($file_pointer, 50); // close file fclose($file_pointer); // clear clearstatcache(); // check file size again echo filesize("new.txt"); // close file fclose($file_pointer); ?>
Output
400 50