Making added custom fields required

The documentation you linked to shows you exactly how to do it. What troubles are you having?

Hello

I embedded the PHP code given for each Example ( https://docs.thememylogin.com/article/62-adding-extra-registration-fields.) in functions.php and theme-my-login-custom.php

Then I received the error message as below:

Fatal error: Cannot redeclare validate_tml_registration_form_fields()

For clarification, the code added in theme-my-login-custom.php is:

function add_tml_registration_form_fields() {
        tml_add_form_field( 'register', 'notices', array(
 		'type'     => 'checkbox',
		'label'    => '当サイトからのお知らせメールを受け取る。',
		'value'    => tml_get_request_value( 'notices', 'post' ),
		'id'       => 'notices',
		'priority' => 15,
	) );
}

And the code added in functions.php is:

function validate_tml_registration_form_fields( $errors ) {
		if ( empty( $_POST['notices'] ) ) {
			$errors->add( 'empty_notices', '<strong>ERROR</strong>' );
		}
		return $errors;
	}
	add_filter( 'registration_errors', 'validate_tml_registration_form_fields' );
	function save_tml_registration_form_fields( $user_id ) {
		if ( empty( $_POST['notices'] ) ) {
			$errors->add( 'empty_notices', '<strong>ERROR</strong>' );
		}
	}
	add_action( 'user_register', 'save_tml_registration_form_fields' );

For now, I just want to validate the one checkbox type field.
Please advise me what to correct.

• This reply was modified 5 years, 7 months ago by eadwig.

Remove the code from functions.php and place all of it in theme-my-login-custom.php.

Putting all the code as shown above into theme-my-login-custom.php still returns the following error:

Fatal error: Cannot redeclare validate_tml_registration_form_fields() (previously declared in /virtual/minnov/public_html/[domain name]/wp-content/plugins/theme-my-login-custom.php:33) in /virtual/minnov/public_html/[domain name]/wp-content/plugins/theme-my-login-custom.php on line 55

What does ‘Cannot redeclare validate_tml_registration_form_fields() ‘ indicate?

It means you’ve use the same name to define two different functions, both on line 33 and 55. Function names must be unique.

Apologies, I was too confused not to notice the function duplicates.

The code given in your Advanced Topics indeed works to validate the form controls!

Thank you.