Saving data from a contact form 7 "selection field" in a custom database and not in a wordpress database

Question

hello who can help me i can not retrieve the data of the selection field in my database. That's what I do following this example Saving contact form 7 data into custom db and not wordpress db but it doesn't work

1. I create the table

 CREATE TABLE test(
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  city VARCHAR(50)
);

2. I Create the form in CF7

 [select city "New York" "Miami" "London"]
 [submit "OK"]

3. And here is the code in function.php

function contactform7_before_send_mail( $form_to_DB ) {
    //connexion to database
   
   $mydb = new wpdb('locacarm_rent2','Sam2005','locacarm_rent2','localhost');;

     $form_to_DB = WPCF7_Submission::get_instance();
    if ( $form_to_DB ) 
        $formData = $form_to_DB->get_posted_data();
 
    $city = $formData['city'];

     
  $mydb->insert( 'test', array('city' =>$city ), array('%s') );
            
    

}
remove_all_filters ('wpcf7_before_send_mail');
add_action( 'wpcf7_before_send_mail', 'contactform7_before_send_mail' );

Answer 1

Your data in the dropdown (select) is stored as an array. Try this. It's more concise and uses the $submission which is already passed to before_send_mail as the third parameter.

Keep in mind, that you should sanitize your input - even with a <select> as someone could post the data without your form. Contact form 7 does not sanitize input fields for insertion into a database.

function contactform7_before_send_mail( $contact_form, $abort, $submission ) {
    // connexion to database.
    $mydb = new wpdb( 'locacarm_rent2', 'Sam2005', 'locacarm_rent2', 'localhost' );
    if ( $submission ) {
        $form_data = $submission->get_posted_data();
        $city      = sanitize_text_field( wp_unslash( $form_data['city'][0] ) );
        $mydb->insert( 'test', array( 'city' => $city ) );
    }

}
add_action( 'wpcf7_before_send_mail', 'contactform7_before_send_mail', 10, 3 );