PHP ftruncate() Function

Example

Truncates an open file to the specified length (100 bytes):

<?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

Definition and Usage

The ftruncate() function truncates an open file to the specified length.

Syntax

ftruncate(file, size)

Parameter Values

Parameter	Description
file	Required. Specifies the open file to truncate
size	Required. Specifies the new file size

Technical Details

Return Value:	TRUE on success, or FALSE on failure.
PHP Version:	4.0+

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