mysql数据库输出一些令人困惑的值

Question

I have a html form all the input fields having the attribute required. But in my database I'm getting some null values? And in some fields I got some confusing values like "5c6752e2954eb" this!

Answer 1

The problem is site is crawled by empty user agent strings! I think the google search is using empty user agent string robots to crawl the website. And the empty user agent string robots are ignoring the robot.txt file.We can block empty user agent string robots using .htaccess file using below code.

insert this code into the .htaccess file

hereRewriteCond %{HTTP_USER_AGENT} ^$
RewriteRule ^(.*)$ - [F,L]