How to prevent crawlers depending on XPath from getting pages contents [duplicate]

Answer 1

1. Define your class in CSS in your page:

`

2. Just make $ClassName as random generated string, you don't need to connect to the database.

Update

Building on bishop answer, you can add changeable DOM structure to your document. You have to introduce two PHP variable such as $start and $close. The $start will have a random opening tags such as

and $close their close,

then enclose your document between them

anything