![Implement Web Push Notification in PHP using W3C provided Notification API](https://images.ctfassets.net/vzl5fkwyme3u/ERmW7y6S781gcWIiFjTRn/de1c1aeb3c79093210828760fc373ab2/AdobeStock_152541972.png?w=1000)
I am sharing you the simple steps by which you can broadcast the web push notifications to your subscriber. In this tutorial we are making a subscriber form and saving information using Ajax and PHP and then through a server side code returning response to current logged in user and showing notification to that user.
**Following are the steps to build this system**
#### 1. Create a database, I am creating db with name 'web_notifications'
Creating subscribers and notifications tables using following sql statements
CREATE TABLE IF NOT EXISTS `subscribers` (
`id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
`email` varchar(255) NOT NULL,
![Laravel Eloquent Relationship Part 1](https://images.ctfassets.net/vzl5fkwyme3u/2iNUlfYJ8SZVYUSemRAszt/eeb78994b12f1491f654d77026ab6c33/AdobeStock_199075029.png?w=1000)
Laravel introduces eloquent relationships from laravel 5.0 onwards. We all know, while we creating an application we all have foreign keys. Each table will be connected to some other. Eloquent make easy to connect each tables easily. Here we will One to one, one to many and many to many relationships. Here we will see three types of relationships,
1. One to one relationships
2. One to many relationships
3. Many to many relationships
## Why Eloquent Relationships
Here we have 2 tables, students and marks, so for join each table,
$student = student::join(‘marks’,’marks.student_id,’=’,students.id’)->where(‘students.id’,’1’)->get();
the above query is to l...
![Standalone PHP Class for Managing Session Based Multiple Cart](https://images.ctfassets.net/vzl5fkwyme3u/5eJ0LsF3z7wkHhDaRBVCtM/1914842168ffa3b33109e930fda9fcd8/AdobeStock_214539382.jpeg?w=1000)
I am sharing you a standalone class for managing a session based cart system. In this class I have provided multiple methods for adding, updating and deleting the products. and By using this class you may manage multiple cart objects with different data only you need to pass a different key in constructor of that class.
### Let me share you the How can we use that Class:
#### Include The cart class
#### Create a Cart Object initializing the Cart base key name, by using different keys we can manage multiple cart data in a same proj...
Conferences are always looking for speakers - it can be hard to keep track of them all and the requirements they have. I wanted to put together this quick guide to make it easy for you to apply. Make sure to apply because as Wayne Gretzky said “You miss 100% of the shots you don’t take”!!!
## phpDay 2019
First we have phpDay 2019 which will take place on May 10 & 11 at Hotel San Marco in Verona, Italy. Some facts about this call for papers:
* **Submission deadline:** February 4, 2019
* **Submit via:** https://cfp.phpday.it/
* For more info on the conference: https://2019.phpday.it/
* Twitter: (@phpday)
* Speaker package includes: Full conference pass (jsDay + phpDay), speaker dinner the first night, lunch, reception and activities included in regular conference.
* For speakers remote to the Area: A refund of up to €200 for travel cost...
![Create Alarm and Monitoring on Custom Memory and Disk Metrics for Amazon EC2](https://images.ctfassets.net/vzl5fkwyme3u/2HgdCq2lZucMyuiYyYiQie/b7376c29a2f94799613e8c1cb8ff4d3b/AdobeStock_91111530.jpeg?w=1000)
Today I am going write a blog on how to Monitor Memory and Disk custom metrics and creating alarm in Ubuntu.
To do this, we can use Amazon CloudWatch, which provides a flexible, scalable and reliable solution for monitoring our server.
Amazon Cloud Watch will allow us to collect the custom metrics from our applications that we will monitor to troubleshoot any issues, spot trends, and configure operational performance. CloudWatch functions display alarms, graphs, custom metrics data and including statistics.
## Installing the Scripts
Before we start installing the scripts for monitoring, we should install all the dependent packages need to perform on Ubuntu.
First login to your AWS server, and from...