PHP代码段导致WordPress中的页面404

Question

I am facing a strange issue with WordPress. When I put this line as a code snippet in a blog post:

$app = require_once __DIR__.'/../bootstrap/app.php';

I get a 404 error when I try to preview the page, and I wont be able to save the post at all but if I make the line of code incorrect for example, remove the last 'e' from require, this way:

$app = requir_once __DIR__.'/../bootstrap/app.php';

everything works fine. Is the code somehow executing and causing problems?

Answer 1

Your web host probably has a paranoid web application firewall (most likely mod_security) enabled, with rules to block requests which contain data which looks like PHP code.

Contact your web host and request that they turn this feature off.