What`s Bug or Error in Php7 ???

<?php

namespace WP_SMS\Pro;

use WP_SMS\Option;

if ( ! defined( 'ABSPATH' ) ) {
    exit;
} // Exit if accessed directly


class AwesomeSupport {

    public $sms;
    public $options;
    public $main_options;

    public function __construct() {
        global $sms;

        $this->sms          = $sms;
        $this->options      = Option::getOptions(true);
        $this->main_options = Option::getOptions();

        // Check new ticket option
        if ( isset( $this->options['as_notify_open_ticket_status'] ) and $this->options['as_notify_open_ticket_status'] ) {
            add_action( 'wpas_open_ticket_before', array( $this, 'notify_new_ticket' ) );
        }

        // Check admin reply ticket option
        if ( isset( $this->options['as_notify_admin_reply_ticket_status'] ) and $this->options['as_notify_admin_reply_ticket_status'] ) {
            add_action( 'wpas_add_reply_public_after', array( $this, 'notify_admin_reply' ) );
        }

        // Check user reply ticket
        if ( isset( $this->options['as_notify_user_reply_ticket_status'] ) and $this->options['as_notify_user_reply_ticket_status'] ) {
            add_action( 'wpas_add_reply_admin_after', array( $this, 'notify_user_reply' ) );
        }
    }

    /**
     * Notify new ticket
     *
     * @param $data
     * @param $post_id
     * @param $incoming_data
     */
    public function notify_new_ticket( $data, $post_id, $incoming_data ) {
        // Check admin mobile number
        if ( empty( $this->main_options['admin_mobile_number'] ) ) {
            return;
        }

        $user     = get_userdata( $data['post_author'] );
        $username = isset( $user->user_login ) ? $user->user_login : '';

        $template_vars = array(
            '%ticket_content%'  => $data['post_content'],
            '%ticket_title%'    => $data['post_title'],
            '%ticket_username%' => $username,
        );
        $message       = str_replace( array_keys( $template_vars ), array_values( $template_vars ), $this->options['as_notify_open_ticket_message'] );

        // Send SMS
        $this->sms->to  = array( $this->main_options['admin_mobile_number'] );
        $this->sms->msg = $message;
        $this->sms->SendSMS();
    }

    /**
     * Notify admin reply ticket
     *
     * @param $reply_id
     * @param $data
     */
    public function notify_admin_reply( $reply_id, $data ) {
        // Check admin mobile number
        if ( empty( $this->main_options['admin_mobile_number'] ) ) {
            return;
        }

        $post        = get_post( $reply_id );
        $post_parent = get_post( $post->post_parent );
        $user        = get_userdata( $post->post_author );
        $username    = isset( $user->user_login ) ? $user->user_login : '';

        $template_vars = array(
            '%reply_content%'  => $post->post_content,
            '%reply_title%'    => $post_parent->post_title,
            '%reply_username%' => $username,
        );
        $message       = str_replace( array_keys( $template_vars ), array_values( $template_vars ), $this->options['as_notify_admin_reply_ticket_message'] );

        // Send SMS
        $this->sms->to  = array( $this->main_options['admin_mobile_number'] );
        $this->sms->msg = $message;
        $this->sms->SendSMS();
    }

    /**
     * Notify user reply ticket
     *
     * @param $reply_id
     * @param $data
     */
    public function notify_user_reply( $reply_id, $data ) {
        $post        = get_post( $reply_id );
        $post_parent = get_post( $post->post_parent );

        // Get user mobile
        $user_mobile = get_user_meta( $post_parent->post_author, 'mobile', true );

        // Check user mobile number
        if ( ! $user_mobile ) {
            return;
        }

        $user     = get_userdata( $post->post_author );
        $username = isset( $user->user_login ) ? $user->user_login : '';

        $template_vars = array(
            '%reply_content%'  => $post->post_content,
            '%reply_title%'    => $post_parent->post_title,
            '%reply_username%' => $username,
        );
        $message       = str_replace( array_keys( $template_vars ), array_values( $template_vars ), $this->options['as_notify_user_reply_ticket_message'] );

        // Send SMS
        $this->sms->to  = array( $user_mobile );
        $this->sms->msg = $message;
        $this->sms->SendSMS();
    }
}

new AwesomeSupport();
?>