直接上代码:
function base64Size($obj){$base64 = preg_replace('/^(data:\\s*(\\w+)\\/(\\w+);base64,)/', '', $obj);$base64 = str_replace('=', '', $base64);$img_len = strlen($base64);$file_size = $img_len - ($img_len / 8) * 2;return number_format(($file_size / 1024), 2).'kb';}