if you created Admin login with simple user name & password like “admin” ” admin” you are not allowed to login to your wordpress admin panel
Step 1: Login to Local phpMyAdmin
Step 2: Export Local WordPress Database
In the Export Method option, you can choose “Quick” or “Custom”. Custom will provide you with more options to export your database. We recommend choosing Quick, and then click the Go button to download your database.
Step 3: Open database sql file on text editor
Step 4: Logging Your Cpanel
Step 5: Click MySQL Databases
Step 6: create database and create a new user
Find create new database & type Your database name. click on create database button
scroll down and find MYSQL Users then type your new user name and create a password. Click create user button
click add user to database
finally you should tick all privileges and click make change
Step 7:Back to Cpanel Home and Click phpMyAdmin
Step 8: Insert Your Database
First Select Your database name
click import tab and then click choose Your file & upload edited database file
Then click go button
Step 9: Go to the Local Site Folder
click your My Computer or Computer or This PC then go to the file path C:\wamp64\www find your site folder and double click site folder and then select all the files in folder and create zip file
Step 10:Back to Cpanel Home and Click file manager
Then Click public_html
Step 11:Upload Your Zip Folder to server
Then uploaded file right click on zip file and extract
Step 12:Find wp-config file and right click wp-config file click edit
and change DB_NAME DB_USER DB_PASSWORD
It is possible to set the site URL manually in the wp-config.php file.
Add these two lines to your wp-config.php, where “yourdomain.com” is the correct location of your site.
define('WP_HOME','http://yourdomain.com');
define('WP_SITEURL','http://yourdomain.com');
13 Edit functions.php
If you have access to the site via FTP, then this method will help you quickly get a site back up and running, if you changed those values incorrectly.
1. FTP to the site, and get a copy of the active theme’s functions.php file. You’re going to edit it in a simple text editor and upload it back to the site.
2. Add these two lines to the file, immediately after the initial “<?php” line.
update_option( 'siteurl', 'http://yourdomain.com' );
update_option( 'home', 'http://yourdomain.com' );
Use your own URL instead of yourdomain.com, obviously.
3. Upload the file back to your site, in the same location. FileZilla offers a handy “edit file” function to do all of the above rapidly; if you can use that, do so.
4. Load the login or admin page a couple of times. The site should come back up.
Note: If your theme doesn’t have a functions.php file create a new one with a text editor. Add the php tags and the two lines using your own URL instead of yourdomain.com:.
update_option( 'siteurl', 'http://yourdomain.com' );
update_option( 'home', 'http://yourdomain.com' );
Upload that to your theme directory. Remove the lines or the remove the file after the site is up and running again.