Front End Login WordPress Plugin – Model View Controller (MVC) – Tutorial – Part Two

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Registration

The scenario of registration is this:  a user fills in a form, selects a username and provides an email address.  Assuming neither corresponds to a currently registered user, the user is registered with her selected username, and an email with the initial password is sent.

View

We will use the shortcode “ferl_register_form“.  The development parallels what we have done before.  After registering the shortcode, we create the register_form() and register_form_view() methods.  Of course we also make a “Register” page to host the shortcode.

	private function add_shortcodes() {
		add_shortcode('ferl_login_form', array( $this,'login_form' ) );
		add_shortcode('ferl_password_form', array( $this,'password_form' ) );
		add_shortcode('ferl_request_password_reset_form', array( $this,'request_password_reset_form' ) );
		add_shortcode('ferl_reset_password_form', array( $this,'reset_password_form' ) );
		add_shortcode('ferl_register_form', array( $this,'register_form' ) );
	}
(...)
	public function register_form() {
		$this->load_css = true;
		$output = '';
		if(!is_user_logged_in()) {

			// check to make sure user registration is enabled
			$registration_enabled = get_option('users_can_register');

			// only show the registration form if allowed
			if($registration_enabled) {
				$output = $this->register_form_view();
			} else {
				$output = __('User registration is not enabled');
			}

		} else {
			// could show some logged in user info here
			$current_user = wp_get_current_user();
			$output = $this->logout_form_view($current_user);
		}
		return $output;
	}

(...)
	private function register_form_view() {
		ob_start(); 

		// show any error messages after form submission
		$this->show_error_messages();
		$this->show_info_messages();
		?>
		<form id="ferl_registration_form" class="ferl_form" action="" method="POST">
			<fieldset>
				<p>
					<label for="ferl_username"><?php _e('Desired username'); ?></label>
					<input name="ferl_username" id="ferl_username"
                    	class="required" type="text"
                        value="<?= $this->model->get_username() ?>" />
				</p>
				<p>
					<label for="ferl_email"><?php _e('Your e-mail'); ?></label>
					<input name="ferl_email" id="ferl_email"
                    	class="required" type="text"
                        value="<?= $this->model->get_email(0) ?>" />
				</p>
				<p>
					<label for="ferl_email1"><?php _e('Your e-mail *repeat'); ?></label>
					<input name="ferl_email1" id="ferl_email1"
                    	class="required" type="text"
                        value="<?= $this->model->get_email(1) ?>" />
				</p>
				<p>
					<input type="hidden" name="ferl_action" value="register" />
					<input type="hidden" name="ferl_register_nonce" value="<?php echo wp_create_nonce('ferl-register-nonce'); ?>"/>
					<input type="submit" value="<?php _e('Register Your Account'); ?>" name="submit" />
				</p>
			</fieldset>
		</form>

		<?php
		return ob_get_clean();
	}

The form looks like this:

Register Form

Register Form

Controller

The Controller looks for the “ferl_action”, and calls the appropriate method in the Model.  We add a case statement for the “register” action, which hands off to the Model register_user method..

			case "register":
				add_action( 'init', array( $this->model, 'register_user' ) );
			break;

Model

The Model takes care of making sure the selected username and email address are valid.  If they are, the user is registered and a random password is generated which is then emailed to the new user.

	public function register_user() {
		if(isset($this->post_array['ferl_username']) && wp_verify_nonce($this->post_array['ferl_register_nonce'], 'ferl-register-nonce') ) {

			$username = $this->post_array["ferl_username"];
			$email = $this->post_array["ferl_email"];
			$email1 = $this->post_array["ferl_email1"];

			$this->email= $email;
			$this->email1= $email1;

			// validate username
			if(trim($username) == '') {
				// empty username
				$this->wp_error->add('username_empty', __('Please enter a username'));
			} else {
				if ( ! $this->is_valid_username($username) ) {
					$this->wp_error->add('username_invalid', __('Invalid username'));
				} else {
					if(username_exists($username)) {
						// Username already registered
						$this->wp_error->add('username_unavailable', __('Username already taken'));
					}
				}
			}

			// validate email
			if(trim($email) == '') {
				// empty email
				$this->wp_error->add('email_empty', __('Please enter an email address'));
			} else {
				// email fields not the same
				if ( $email != $email1 ) {
					$this->wp_error->add('email_fields_unequal', __('Please enter the same email address twice'));
				} else {
					if ( ! is_email($email) ) {  // uses the WP is_email function
						$this->wp_error->add('email_invalid', __('Please enter a valid email address'));
					}
				}
			}

			// retrieve all error messages
			$errors = $this->wp_error->get_error_messages();
			// only create the user in if there are no errors
			if(empty($errors)) {
				$new_password = wp_generate_password(12, false, false);
				$new_user_record = array(
						'user_login'		=> $username,
						'user_pass'	 		=> $new_password,
						'user_registered'	=> date('Y-m-d H:i:s'),
						'role'				=> 'subscriber'
					);

				$new_user_id = wp_insert_user($new_user_record);
				// if it is NOT a number .. something went very wrong
				if (! is_numeric($new_user_id) ) {
					var_dump($new_user_id); echo "<br />";
					die('Fatal error in user registration.  <a href="'.site_url().'">Please contact us.</a>');
				} else {
					// update the email (this allows for duplicate email addresses
					$new_user_id = wp_update_user( array('ID' => $new_user_id, 'user_email' => $email) );
				}

				if (! is_numeric($new_user_id) ) {
					var_dump($new_user_id); echo "<br />";
					die('Fatal error in user registration (2).  <a href="'.site_url().'">Please contact us.</a>');
				}

				if($new_user_id) {
					wp_new_user_notification($new_user_id);
					/* send an email to the newly registered user */
					$to = $email;
					$body = "..";
					$body .= "\nHello ".$username." !";
					$body .= "\n\nWelcome to the \"".get_bloginfo('name')."\" website and thank you for registering";
					$body .= "\n\nYour username is ".$new_user_record['user_login']."\n";
					$body .= "\nYour new password is ".$new_user_record['user_pass']."\n";
					$body .= "\nPlease Sign In to your account with your Username and the Password provided.";
					$body .= "\n".site_url()."/sign-in ";
					$body .= "\n\nAfter you are signed in, change your password 🙂 ";
					$body .= "\n\nDo not reply to this message as replies are not monitored.";
					$body .= "\n\n";
					wp_mail($to, "[".get_bloginfo( 'name' )."] Thank you for registering ".$username,$body);
					/* send the newly created user to the Sign In after registration */
					wp_redirect(site_url().'/email-message-sent'); exit;
				}
			}
		}
	}

Note that we also added some validation methods to the Model.

	private function is_valid_username( $un ) {
		$un_chars = array('.', '-', '_');
		$valid = true;
		$valid = $valid && ctype_alpha( substr($un,0,1) );
		$valid = $valid && (strlen( $un ) >= 4);
		$valid = $valid && $this->is_valid_string( $un, $un_chars );
		return $valid;
	}

	private function is_valid_string ($s, $chars = array() ) {
		return ctype_alnum( str_replace($chars, '', $s) );
	}

The registration email looks like this (click on the image)

Registration email

Registration email

Some final comments on the next page.

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