autotutorial

create test.php

<?php
error_reporting(-1);
ini_set('display_errors','Off');

create myload.php

<?php
include dirname(__FILE__).'/test.php';
//Constant undefined
Myconst;

Run http://mydomain.com/myload.php

when you enable debugging you can turn off the error display, otherwise errors are always visible.

<?php
//good
define('WP_DEBUG', true);
define('WP_DEBUG_DISPLAY', false);

<?php
//Bad
define('WP_DEBUG', false);
define('WP_DEBUG_DISPLAY', false);

• This reply was modified 6 years, 6 months ago by autotutorial. Reason: Fix

Check your rule on root .htaccess and check on root if index.php have redirect.
https://github.com/WordPress/WordPress/blob/master/index.php
I see redirect.

This is a problem of cache (your server, load balancing, reverse proxy and/or your plugin have copy of page with pretty Permalink, but your htaccess is missing now).
If you are using non-pretty permalinks, you should pass the REST API route as a query string parameter. The route http://oursite.com/wp-json/ in the example above would hence be http://oursite.com/?rest_route=/
Set your missing .htaccess and it work 😉
Pretty Permalink

The configuration wizard relies on a built-in WordPress tool called the REST API. Per the screenshot, this tool is returning to 404 Not Found which means that either the core files are missing or your site / server has disabled the REST API.

There are several reasons when a status code other than http 200 comes out, the 404 code often indicates incorrect request in this case forward this technical advice, yoast if it meets a 404 with all methods and indicates if it is a
problem of http://oursite.com/index.php/wp-json/ PATHINFO (Almost Pretty), http://oursite.com/index.php/wp-json/ .htaccess (Pretty Permalink) or http://oursite.com/?rest_ruote=/ query string (Ugly).

• This reply was modified 6 years, 6 months ago by autotutorial. Reason: Edit for missing content

I’m sorry for your problem.
You have WordPress on ROOT folder??
You have WordPress multisite or WordPress Normal?

Don’t read the link but only my code … it’s a pleasure to be useful.

change url

//Trust HOST
if(!($_SERVER['HTTP_HOST'] == 'myhost.com')) {
//Trust IP for Trust HOST
//Read if you have $_SERVER['SERVER_ADDRESS']
if($_SERVER['REMOTE_ADRESS'] === '21.20.20.20') {
define( 'WP_HOME', 'http://21.20.20.20' );
define( 'WP_SITEURL', 'http://21.20.20.20' );
}
}

if you use an ip other than localhost, then the inverse resolution of your hostname in this example myhost.com is ip 21.20.20.20. Replace myhost.com with your host and your ip referring to hostname

the data in the database are stored with myhost.com and before executing a search and replace exclusively by plugins, make backups of your files and the database and test if with this code you can enter .. I’m not sure but since ip and hostname share the same storage memory and use the conditional (if of the first line of code) maybe you can view your photos myhost.com/uploads/ even when you use your ip ..

Recommendation when using your ip do not change or add anything … do not touch pages or articles … otherwise in the database you will have the old data on myhost.com while the new ones on 21.20.20.20

• This reply was modified 6 years, 6 months ago by autotutorial.

Your WordPress version from version.php?
Example of 5.2.5 alpha https://github.com/WordPress/WordPress/blob/5.2-branch/wp-includes/version.php#L16