The search.php of the Nexmoe theme is the file for the sidebar search function. However, if the website does not enable pseudo-static and directly references search in the template appearance, using the search box will result in the error 『No input file specified.』.

This is because when pseudo-static is not enabled, the website domain will include /index.php, and the original search.php does not accommodate this. You need to manually locate the following code segment in search.php:

Then change this:

To this:

The search function will then work.