ftruncate

(PHP 4, PHP 5, PHP 7)

ftruncate — Truncates a file to a given length

Descrierea

ftruncate ( resource $handle , int $size ) : bool

Takes the filepointer, handle, and truncates the file to length, size.

Parametri

handle

The file pointer.

Notă:

The handle must be open for writing.

size

The size to truncate to.

Notă:

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.

Valorile întoarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eșecului.

Exemple

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);
?>

Note

Notă:

The file pointer is not changed.

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