[Forminator Pro] - Name field custom prefixes

wpmudev-forminator-custom-name-prefixes.php

<?php
/**
* Plugin Name: [Forminator Pro] - Name field custom prefixes
* Plugin URI: https://premium.wpmudev.org/
* Description: Add custom prefixes on name field (as of 1.11.4)
* Author: Alessandro Kaounas @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* Task: 0/11289012348292/1165769246258511
* License: GPLv2 or later
*/

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// No need to do anything if the request is via WP-CLI.
if ( defined( 'WP_CLI' ) && WP_CLI ) {
	return;
}

if ( ! class_exists( 'WPMUDEV_Forminator_Custom_Name_Prefixes' ) ) {
    
    class WPMUDEV_Forminator_Custom_Name_Prefixes {
        
        // Form ID to apply
        private $form_id = 488;
        
        // Pre selected custom prefix
        private $selected = 'Parent';
        
        // Custom prefixes to append
        private $prefixes = array(
            'Parent'     => 'Parent',
            'Child'      => 'Child',
            'Grandchild' => 'Grandchild',
        );

        // Append new values or override
        private $append = true;

        private static $_instance = null;

        public static function get_instance() {

            if( is_null( self::$_instance ) ){
                self::$_instance = new WPMUDEV_Forminator_Custom_Name_Prefixes();
            }
            return self::$_instance;
            
        }

        private function __construct() {

			if ( ! class_exists( 'Forminator' ) ) {
				return;
			}

			$this->init();
			
        }

        private function init(){
            
            add_filter( 'forminator_before_form_render', function( $id ){
                
                if( $this->form_id !== $id ){
                    return;
                }
                
                // Add field filters
                add_filter( 'forminator_name_prefixes', array( $this, 'wpmudev_forminator_name_prefixes' ) );
                add_filter( 'forminator_field_markup', array( $this, 'wpmudev_forminator_field_markup' ), 10, 3 );

            });
            
        }

        public function wpmudev_forminator_name_prefixes( $prefixes ){

            if( ! $this->append ){
                $prefixes = array();
            }

            foreach( $this->prefixes as $key => $value ){
                $prefixes[$key] = __( $value, 'forminator' );
            }
            
            return $prefixes;

        }

        public function wpmudev_forminator_field_markup( $html, $field, $form ){

            if( $field['type'] === 'name' && $field['element_id'] === 'name-1' ){
                
                $field['prefix_placeholder'] = $this->selected;
                
                // Remove any pre-selected prefix
                $html = str_replace( ' selected="selected"', '', $html );
                
                // Pre select new option
                $html = str_replace( '<option value="' . $field['prefix_placeholder'] . '"', '<option value="' . $field['prefix_placeholder'] . '" selected="selected"', $html );

            }
            
            return $html;

        }

    }
    
    add_action( 'plugins_loaded', function() { 
        
        return WPMUDEV_Forminator_Custom_Name_Prefixes::get_instance(); 

    });

}