function validate_signup() { require_once WPPR_PLUGIN_DIR . '/models/signup-model.php'; $model = new Signup_Model(); if (username_exists($this->username)) { return new WP_Error('username_unavailable', 'Username already taken'); } if (!validate_username($this->username)) { // invalid username return new WP_Error('username_invalid', 'Username is invalid'); } if (strlen($this->username) < 4) { return new WP_Error('username_length', 'Username too short. At least 4 characters is required'); } 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 is already in used.'); } if ($model->validate_email($this->email)) { return new WP_Error('email', 'You already used this email to signup. Please check your email for confirmation.'); } if (strlen($this->password) <= 5) { return new WP_Error('password_too_short', 'Password is too short.'); } }