File size of big files

[luzik]

Files like 4GB are do not shows size at all

[halgatewood]

I'm using the built-in PHP function filesize. Here is a note on that page:

Note: Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results for files which are larger than 2GB. http://php.net/manual/en/function.filesize.php

[luzik]

In user notes section of this manual page there are few resolution for this issue. Please consider using something like:

<?php
/**
* Return file size (even for file > 2 Gb)
* For file size over PHP_INT_MAX (2 147 483 647), PHP filesize function loops from -PHP_INT_MAX to PHP_INT_MAX.
*
* @param string $path Path of the file
* @return mixed File size or false if error
*/
function realFileSize($path)
{
    if (!file_exists($path))
        return false;

    $size = filesize($path);

    if (!($file = fopen($path, 'rb')))
        return false;

    if ($size >= 0)
    {//Check if it really is a small file (< 2 GB)
        if (fseek($file, 0, SEEK_END) === 0)
        {//It really is a small file
            fclose($file);
            return $size;
        }
    }

    //Quickly jump the first 2 GB with fseek. After that fseek is not working on 32 bit php (it uses int internally)
    $size = PHP_INT_MAX - 1;
    if (fseek($file, PHP_INT_MAX - 1) !== 0)
    {
        fclose($file);
        return false;
    }

    $length = 1024 * 1024;
    while (!feof($file))
    {//Read the file until end
        $read = fread($file, $length);
        $size = bcadd($size, $length);
    }
    $size = bcsub($size, $length);
    $size = bcadd($size, strlen($read));

    fclose($file);
    return $size;
}