convert byte to megabyte php
function formatBytes($bytes, $precision = 2) {
$units = array('B', 'KB', 'MB', 'GB', 'TB');
$bytes = max($bytes, 0);
$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
$pow = min($pow, count($units) - 1);
// Uncomment one of the following alternatives
// $bytes /= pow(1024, $pow);
// $bytes /= (1 << (10 * $pow));
return round($bytes, $precision) . ' ' . $units[$pow];
}