Filesize method that works with files >2GB on 32bit PHP

realFileSize.php

<?php

/**
 * Filesize method that works with files >2GB on 32bit PHP
 * 
 * @link http://php.net/manual/en/function.filesize.php#113457
 * @param string $file Path to file
 * @return int|float Size of file
 */
function realFileSize($file)
{
    $fp = fopen($file, 'r');
    
    $pos = 0;
    $size = 1073741824;
    fseek($fp, 0, SEEK_SET);
    while ($size > 1)
    {
        fseek($fp, $size, SEEK_CUR);
        if (fgetc($fp) === false)
        {
            fseek($fp, -$size, SEEK_CUR);
            $size = (int)($size / 2);
        }
        else
        {
            fseek($fp, -1, SEEK_CUR);
            $pos += $size;
        }
    }
    
    while (fgetc($fp) !== false)  $pos++;
    
    fclose($fp);
    
    return $pos;
}