Truncates a file to a given length
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    ftruncate

    (PHP 4, PHP 5, PHP 7, PHP 8)

    ftruncate — Truncates a file to a given length

    Description

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

    Takes the filepointer, stream, and truncates the file to length, 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.

    See Also