IMP Link
https://phppot.com/php/how-to-create-a-contact-form-in-wordpress/
https://catswhocode.com/wordpress-contact-form-without-plugin/
https://sknetking9.blogspot.com/2022/02/how-to-create-custom-contact-us-page.html
WP_Query
wpdb
How to Create and Use WordPress User Metadata (User Meta)
How To Add Custom User Meta During Registration
https://webkul.com/blog/wordpress-custom-fields-user-profile-page/
How to add custom fields to the WordPress registration form
https://wowlayers.com/when-to-use-esc_attr-esc_html-and-esc_url-in-wordpress/
How WordPress user data is stored in the database
https://codex.wordpress.org/Database_Description
https://rudrastyh.com/wordpress/get-user-id.html
Working with User Metadata
Working with Users
https://wordpress.stackexchange.com/questions/338136/add-custom-user-meta-data
How to add a custom user field in WordPress
wp_signon()
wp_login()
CRED Operation PHP
Very Simple Add, Edit, Delete, View (CRUD) in PHP & MySQL [Beginner Tutorial]
CRUD Operations in PHP Using MySQL
https://www.tutorialrepublic.com/php-tutorial/php-mysql-crud-application.php
CRED Operation WordPress
https://www.davidangulo.xyz/how-to-create-crud-operations-plugin-in-wordpress/
http://sahil-gulati.blogspot.com/2019/09/create-custom-crud-operation-plugin.html