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To create a custom user registration in WordPress, you can follow these steps:
1. Create a custom registration form: You can create a custom registration form using HTML and PHP. You can add fields like username, email, password, etc.
2. Create a custom registration function: You can create a custom registration function in your theme's functions.php file. This function will handle the registration process when the form is submitted.
3. Validate user input: Make sure to validate user input to prevent any malicious code or invalid data from being submitted.
4. Add user to WordPress database: Once the user input is validated, you can add the user to the WordPress database using the wp_insert_user() function.
5. Redirect user after registration: After successful registration, you can redirect the user to a custom page or dashboard.
6. Display registration form: Finally, display the custom registration form on your website using a shortcode or template file.
Remember to also consider security measures such as using reCAPTCHA, sanitizing user input, and implementing strong password requirements to protect user data.