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<?php /** * @param string format Sets format for size. * Format should containt string parseable by sprintf function and contain one %F macro that will be replaced by size. Another macro is U/u. It will be replaced with used unit. U for uppercase, u - lowercase. If 'i' is present at the end of format string, size multiplier will be set to 1024 (and units be KiB, MiB and so on), otherwise multiplier is set to 1000. * @example "%.0F Ui" 617 KiB * @example "%.3F Ui" 617.070 KiB * @example "%10.3F Ui" 616.85 KiB * @example "%.3F U" 632.096 KB * * @param integer $bytes Size in bytes * @param string $unit Sets default unit. Can have these values: B, KB, MG, GB, TB, PB, EB, ZB and YB */ function size_format($format, $bytes, $unit = null) { $units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'); $bytes = max($bytes, 0); if ($unit !== null) $unit = strtoupper($unit); if (substr($format, -1) === 'i') { $multiplier = 1024; $format = substr($format, 0, -1); } else $multiplier = 1000; if ($unit === null || !in_array($unit, $units)) { $pow = floor(($bytes ? log($bytes) : 0) / log($multiplier)); $pow = min($pow, count($units) - 1); $bytes /= pow($multiplier, $pow); $unit = $units[$pow]; } else { $pow = array_search($unit, $units); $bytes /= pow($multiplier, $pow); } if ($multiplier == 1024) $unit = (strlen($unit) == 2) ? substr($unit, 0, 1).'iB' : $unit; if (strpos($format, 'u') !== false) $format = str_replace('u', strtolower($unit), $format); else $format = str_replace('U', $unit, $format); return sprintf($format, $bytes); } var_dump(PHP_INT_MAX); $s = '9223372036854775807'; $i = (int)$s; var_dump($s, $i); var_dump(size_format('%.2F Ui', $s)); var_dump(size_format('%.2F Ui', $i));