custom wordpress register form by shortcode

// wordpress register form

// functions.php

class jeba_registration_form
{
private $username;
private $email;
private $password;
private $website;
private $first_name;
private $last_name;
private $nickname;
private $bio;
function __construct()
{
add_shortcode('jeba_registration_form', array($this, 'shortcode'));
add_action('wp_enqueue_scripts', array($this, 'flat_ui_kit'));
}
public function registration_form()
{
?>
<form method="post" action="<?php echo esc_url($_SERVER['REQUEST_URI']); ?>">
<div class="login-form">
<div class="form-group">
<input name="reg_name" type="text" class="form-control login-field"
value="<?php echo(isset($_POST['reg_name']) ? $_POST['reg_name'] : null); ?>"
placeholder="Username" id="reg-name" required/>
<label class="login-field-icon fui-user" for="reg-name"></label>
</div>
<div class="form-group">
<input name="reg_email" type="email" class="form-control login-field"
value="<?php echo(isset($_POST['reg_email']) ? $_POST['reg_email'] : null); ?>"
placeholder="Email" id="reg-email" required/>
<label class="login-field-icon fui-mail" for="reg-email"></label>
</div>
<div class="form-group">
<input name="reg_password" type="password" class="form-control login-field"
value="<?php echo(isset($_POST['reg_password']) ? $_POST['reg_password'] : null); ?>"
placeholder="Password" id="reg-pass" required/>
<label class="login-field-icon fui-lock" for="reg-pass"></label>
</div>
<div class="form-group">
<input name="reg_website" type="text" class="form-control login-field"
value="<?php echo(isset($_POST['reg_website']) ? $_POST['reg_website'] : null); ?>"
placeholder="Website" id="reg-website"/>
<label class="login-field-icon fui-chat" for="reg-website"></label>
</div>
<div class="form-group">
<input name="reg_fname" type="text" class="form-control login-field"
value="<?php echo(isset($_POST['reg_fname']) ? $_POST['reg_fname'] : null); ?>"
placeholder="First Name" id="reg-fname"/>
<label class="login-field-icon fui-user" for="reg-fname"></label>
</div>
<div class="form-group">
<input name="reg_lname" type="text" class="form-control login-field"
value="<?php echo(isset($_POST['reg_lname']) ? $_POST['reg_lname'] : null); ?>"
placeholder="Last Name" id="reg-lname"/>
<label class="login-field-icon fui-user" for="reg-lname"></label>
</div>
<div class="form-group">
<input name="reg_nickname" type="text" class="form-control login-field"
value="<?php echo(isset($_POST['reg_nickname']) ? $_POST['reg_nickname'] : null); ?>"
placeholder="Nickname" id="reg-nickname"/>
<label class="login-field-icon fui-user" for="reg-nickname"></label>
</div>
<div class="form-group">
<input name="reg_bio" type="text" class="form-control login-field"
value="<?php echo(isset($_POST['reg_bio']) ? $_POST['reg_bio'] : null); ?>"
placeholder="About / Bio" id="reg-bio"/>
<label class="login-field-icon fui-new" for="reg-bio"></label>
</div>
<input class="btn btn-primary btn-lg btn-block" type="submit" name="reg_submit" value="Register"/>
</form>
</div>
<?php
}
function validation()
{
if (empty($this->username) || empty($this->password) || empty($this->email)) {
return new WP_Error('field', 'Required form field is missing');
}
if (strlen($this->username) < 4) {
return new WP_Error('username_length', 'Username too short. At least 4 characters is required');
}
if (strlen($this->password) < 5) {
return new WP_Error('password', 'Password length must be greater than 5');
}
if (!is_email($this->email)) {
return new WP_Error('email_invalid', 'Email is not valid');
}
if (email_exists($this->email)) {
return new WP_Error('email', 'Email Already in use');
}
if (!empty($website)) {
if (!filter_var($this->website, FILTER_VALIDATE_URL)) {
return new WP_Error('website', 'Website is not a valid URL');
}
}
$details = array('Username' => $this->username,
'First Name' => $this->first_name,
'Last Name' => $this->last_name,
'Nickname' => $this->nickname,
'bio' => $this->bio
);
foreach ($details as $field => $detail) {
if (!validate_username($detail)) {
return new WP_Error('name_invalid', 'Sorry, the "' . $field . '" you entered is not valid');
}
}
}
function registration()
{
$userdata = array(
'user_login' => esc_attr($this->username),
'user_email' => esc_attr($this->email),
'user_pass' => esc_attr($this->password),
'user_url' => esc_attr($this->website),
'first_name' => esc_attr($this->first_name),
'last_name' => esc_attr($this->last_name),
'nickname' => esc_attr($this->nickname),
'description' => esc_attr($this->bio),
);
if (is_wp_error($this->validation())) {
echo '<div style="margin-bottom: 6px" class="btn btn-block btn-lg btn-danger">';
echo '<strong>' . $this->validation()->get_error_message() . '</strong>';
echo '</div>';
} else {
$register_user = wp_insert_user($userdata);
if (!is_wp_error($register_user)) {
echo '<div style="margin-bottom: 6px" class="btn btn-block btn-lg btn-danger">';
echo '<strong>Registration complete. Goto <a href="' . wp_login_url() . '">login page</a></strong>';
echo '</div>';
} else {
echo '<div style="margin-bottom: 6px" class="btn btn-block btn-lg btn-danger">';
echo '<strong>' . $register_user->get_error_message() . '</strong>';
echo '</div>';
}
}
}
function flat_ui_kit()
{
wp_register_script( 'bootstrap', 'https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css', array('jquery'), 3.3, true);
wp_enqueue_script('bootstrap');
}
function shortcode()
{
ob_start();
if (isset($_POST['reg_submit']) ? $_POST['reg_submit'] : null) {
$this->username = $_POST['reg_name'];
$this->email = $_POST['reg_email'];
$this->password = $_POST['reg_password'];
$this->website = $_POST['reg_website'];
$this->first_name = $_POST['reg_fname'];
$this->last_name = $_POST['reg_lname'];
$this->nickname = $_POST['reg_nickname'];
$this->bio = $_POST['reg_bio'];
$this->validation();
$this->registration();
}
$this->registration_form();
return ob_get_clean();
}
}
new jeba_registration_form;


********************************************************************************************************
// show in template this shortcode

<?php echo do_shortcode('[jeba_registration_form]');?>