Create a contact form in Silverstripe where submissions are emailed to admin and saved to database. There are 3 Silverstripe files included in this gist.

SS_ContactForm

<?php 

  /** Important: When adding a second form to a website the second ModalAdmin extention would not function until I added it's
  * Tested: 3.0
	* name into the same $managed_models array as the first. I was then able to take it out and have it work on it's own.
	* ContactPage.php
	* This is all the logic for the Contact page.
	*/
	class ContactPage extends Page
	{
		
		//Set relationship
		public static $has_many = array(
  			'ContactFormSubmissions' => 'ContactFormSubmission'
 		);

	}

	/**
	*  Contact Page Controller
	*/
	class ContactPage_Controller extends Page_Controller
	{

		static $allowed_actions = array('ContactForm');
		
		//Create Contact Form
		public function ContactForm(){

			//Add form fields
			$fields = new FieldList(
				new TextField('Name'),
				new EmailField('Email'),
				new NumericField('Phone'),
				new TextField('Book', 'Book A Mobile Advisor'),
				new TextField('Info', 'Information Request A Product Type'),
				new TextField('Question', 'Ask A Question'),
				new CheckboxField('Join', 'Join Our Mailing List')
			);

			// Create actions EG. Submit
			$actions = new FieldList(

				new FormAction('doContactForm', 'Submit')
			);

			//Create Form Validation required fields
			$validator = new RequiredFields('Name', 'Email');

			//Return form as an Object
			return new Form($this, 'ContactForm', $fields, $actions, $validator);
			

		}


		//Process the contact form
		public function doContactForm($data, $form){

			//Create submission object
			$submission = new ContactFormSubmission();
			//save submission object into form object this function is needed so the submission values will be available from the $submission object.
			$form->saveInto($submission);
			$submission->write();

			//Email form submission to user.
			$from = '[email protected]';

			//Get SiteConfig to get the email setting to send an email to them.
			$config = SiteConfig::current_site_config(); 
			$to = $config->ContactFormEmailAddress;

			$subject = 'Legacy Life Contact Form';
			print_r($config->ContactFormEmailAddress);

			$body = 'Name: '.$submission->Name.'<br />'; 
			$body .= 'Email: '.$submission->Email.'<br />';
			$body .= 'Phone: '.$submission->Phone.'<br />';
			$body .= 'Book A Mobile Advisor: '.$submission->Book.'<br />';
			$body .= 'Information Request A Product Type: '.$submission->Info.'<br />';
			$body .= 'Ask A Question: '.$submission->Question.'<br />';


			$email = new Email($from, $to, $subject, $body);
			$email->send();


			//Once finished processing form redirect back to contact page.
			//return $this->redirectBack();

		}
		
	}
?>

<?php

  /**
	* ContactFormSubmission.php
  * ContactFormSubmission Controller
	*
	*/
	class ContactFormSubmission extends DataObject
	{
		
		//Add new columns to the database
		static $db = array(
			'Name' => 'Varchar(100)',
			'Email' => 'Varchar(100)',
			'Phone' => 'Varchar(100)',
			'Book' => 'Varchar(100)',
			'Info' => 'Varchar(100)',
			'Question' => 'Varchar(100)',
			'Join' => 'Varchar(100)'

		);

		 public static $has_one = array(
  		'ContactPage' => 'ContactPage'
 		);

 		public static $summary_fields = array(
  		'Name' => 'Name',
  		'Email' => 'Email',
  		'Phone' => 'Phone',
  		'Book' => 'Book A Mobile Advisor',
  		'Info' => 'Information Request A Product Type',
  		'Question' => 'Ask A Question',
  		'Join' => 'Join Our Mailing List',
 		);
		
	}

?>


<?php 

  /**
	* ContactFormAdmin.php
	* This file will creat the menu in the CMS which displays all contact form entries.
	*/

class MyAdmin extends ModelAdmin {
  public static $managed_models = array('ContactFormSubmission'); // Can manage multiple models
  static $url_segment = 'contact-form'; // Linked as /admin/products/
  static $menu_title = 'Contact Form Submissions';
  static $menu_icon = 'mysite/images/contact-icon.jpg';

  //This function is used to overload the modal admin form and change it.
  public function getEditForm($id = null, $fields = null) {
        $form = parent::getEditForm($id, $fields);
        $gridField = $form->Fields()->fieldByName($this->sanitiseClassName($this->modelClass));
        $gridField->getConfig()->removeComponentsByType('GridFieldAddNewButton');
        $gridField->getConfig()->removeComponentsByType('GridFieldEditButton');

        return $form;
  }


}

?>