GBK character encoding character set defects lead to web security vulnerabilities-vulnerability warning-the black bar safety net

Many times, character encoding is used, we will not be too care about. Like the Chinese website, we generally use the gb2312,gbk,gb18030,you can also use utf-8. However, maybe we don't know, choose a different encoding, and may therefore cause the program itself to design defects. Multibyte...