pier2001

@sterndata following your structure, one by one to be deactivated. the issue remains.

@joyously OK, I now choose PHP Compatibility Checker, a plugin to update it. I remember you said no to use a plugin to update PHP, but I don’t know what else method I should execute.

@joyously Now, I download the latest WP and replace all the files in the server as my server provider ask me to do to solve the problem. then the pages are still blank but I can log on https://www.whmcn.com/wp_login.php and go into https://www.whmcn.com/wp-admin, then I was asked to change the theme, and the page shows up. and… I upload the real one theme which I created the pages and apply them. the pages display more properly. and upload folder and more plugins to upload to server. now the website is slow but works. half of the images are no show. I am fixing it by creating another topic here.

About the PHP version, I am wondering why the WP files are the latest in the server, but the version is still 5.6.40. I still need to update the version, right?

@gilbertank very bad, isn’t it? but I can be sure it works, could you refresh and try it again?

I have a topic about the error of uploading website, I believe it is related to this topic too. but since the website is working now, so I create this topic, most likely it is related to the plugin Elementor, but I am not sure. again, the problem is half of the image didn’t show.

You should try to use the modern PHP version, preferably the same version on local and your server. PHP 5.6 and PHP 7.0 are already at End Of Life, so try to get 7.2 at least.

@joyously I want to update the PHP versions ASAP. I learned from this guide online. that I can update the local’s through a plugin, but you know I couldn’t even log in the server’s WordPress, Is there another way to update? such as through Cpanel?

meanwhile, do you think the PHP issue is the main reason my website is blank? my server provider suggests I should upload the folder of “rttheme10” which is a theme, as they believe WP is lack of it after they go through the error log. I certainly will follow the lead, and update here if it works.

however, it is Elementor which I used to edit my new website content, there is no rttheme10 in the local WordPress folder(but I can find it from the server backup folder). since I upload the local folder to replace the server folder, by this means, the website displays the way like in localhost, what is the reason to keep the rttheme10 folder?

my website management agent is no longer support WP platform, that is why I have to come here for support.

last, could you again advise or share a place which I can learn how to open the error_log file, it seems to be a bit of complex.

@jdembowski OK， thank you for your attention, we will update at the earliest time we can.

the DB_NAME in wp_config.php is “wan hui\’s new website” I believe in PHP, \ is added by default. it is tricky. we have to be very careful

b-quote testing

It doesn’t do any good to have the error log if you don’t read what is in it. It should tell you what is going wrong.

I am new on PHP, so how can I open the error log file and how can I fix them according to the content inside. do you have a good post can share about this? I will google it as well.

@joyously I only changed the domain name at two locations, they are “siturl” and “home” in wp_options in database. how do I “changing the length somewhere like plugin options” if it is essential

the WP versions are the same I believe, as I just update them to the latest 5.2.2.
localhost Current PHP version: 7.3.6. I use an FTP client to upload versioncheck.php in the root directory of my web server. then I go to https://www.whmcn.com/versioncheck.php it shows “The requested URL /versioncheck.php was not found on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.” you may figure out the problem is.

I found error_log on /public_html/ and /public_html/wp-content/ and /public_html/wp-admin/

I changed the plugin folder name on the server. it doesn’t change anything, so I will pass that point.

Here is the background check factor
There were 300+MB files in the server when the old site run normally. then I upload the whole folder of C:\xampp\htdocs\wordpress one time and wp_content in another time by over-writing the folder to make sure the copy is complete during the trouble occur. therefore I might Mix the files in both side or NOT, as I have deleted all the old site’s php files in /public_html/ in server except wp_config.php and wp_login.php

the size of the WordPress folder in my hard drive is 788MB including 574MB of “ai1wm-backups” but my server has been used 956.96MB/1000MB. it is nearly full.

I might don’t figure out the role of user’s information in the database during migration, which may be the reason I fail. for example, I am not sure which wp_login.php file should I keep in the server.

@joyously I use the same database prefix which is “wp_” both in localhost and server. I believe they are a default setting. What do you mean by “The WP user accounts also have the prefix in them.”？

I choose to migrate manually from localhost(the new one) to an existing website(the old one) (www.whmcn.com). both have a different WordPress account to manage. again, I believe replace the existing website’s wp-content folder with the localhost’s. check the database prefix make sure refer to the same path. and keep the wp-config.php same as the old one NOT the new one. since I will still use the old one’s account to access the dashboard, etc. again, it is my whole idea of migration.

I did change plugin’s folder name see if it works, actually, not.

@hypersonic I can find the name which is “wan hui’s new website”, but in wp-config.php It seems to have a rule for a symbol, for example, ‘ is illegal. that is why I type “wan hui’s new website” after DB_NAME and save it. but I still can not log on localhost/Wordpress. as it is not “wan hui’s new website” I delete the original words after the DB_NAME which created by default according to the WordPress setting at the beginning. now I need to find out the original word in the wp-config.php. otherwise, I don’t know what to do.

Hi, thank you for the response. my website host provider used a plugin to disable the upgrade. when I disactive it, it works so problem solved.