This video shows how you can check username if it already exists in the PostgreSQL database or not using jQuery AJAX and PHP.
0:07 - Table
0:47 - Database configuration
1:33 - Create index.php file
2:12 - AJAX file
4:02 - jQuery script
6:03 - Run the project
Read tutorial and download code - https://makitweb.com/check-username-a...
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