What is Interface in PHP? Back to Basics

An Interface allows the users to create programs, specifying the public methods that a class must implement, without involving the complexities and details of how the particular methods are implemented. It is generally referred to as the next level of abstraction. It resembles the abstract methods, resembling the abstract classes. An Interface is defined just like a class is defined but with the class keyword replaced by the interface keyword and just the function prototypes. The interface contains no data variables. The interface is helpful in a way that it ensures to maintain a sort of metadata for all the methods a programmer wishes to work on.

Interfaces are characterized similarly as a class, however, only the interface keyword replaces the class phrase in the declaration and without any of the methods having their contents defined.

Example

Let' create an interface and implement it with a simple example.

Explanation

Here we have declared an interface MyFirstInterface with two methods getName and getAge() inside it without any content. Then the class MyClass implements this interface and uses the available methods according to requirement.

Let's learn some important Characteristic of the interface:

1. An interface comprises of methods that have no content, which means the interface methods are abstract methods.
2. Every one of the methods in interfaces must have public visibility scope.
3. Interfaces are not quite the same as classes as the class can inherit from one class but the class can implement one or more interfaces.
4. No variables cant be present inside the interface.

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Choosing Work From Home (WFH) Career As A Freelancer To Bring in Cash

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A great method to acquire income for work from home career openings is that of freelance work. It's an opportunity to work as indicated by your own hours accomplishing work you like.

Perhaps the most ideal approach to procure salary for work from home career is to the agreement to accomplish freelance work from your home office. The freelance composition or other freelance work can take numerous structures, contingent on your experience and preparation. You can surely structure the freelance work to accentuate the work you appreciate the most and limit the work you disdain. Freelance work might be gotten that requires practically no venture. It permits you to work at your own pace and for an expense that will address your issues. These are only two of the advantages of accomplishing freelance work.

Finding a site 

There are a few top-quality sites where you can post freelance occupations or where you can offer on employments that fall inside your experience and preparation. The sorts of occupations are stated on the site and the bidder determines the amount of the work prerequisites will be finished, the time period wherein it will be finished and the expense for carrying out the responsibility. The purchaser at that point can pick the bidder that is liked and the arrangement is then concluded. The purchaser and the specialist organization both advantage with work from home employments.

Article Directories / Portals

Numerous purchasers contract with specialist co-ops to compose articles that will be put in article catalogs. These registries give significant information on an assortment of subjects. Since they contain information about the URL or site of the writer, articles put in indexes are a simple method to expand your page positioning through search engine optimization. Connecting these articles to the site carries traffic to the referenced site. Finishing the articles that will be set in the registries is a great method to break into work from home career freelance exercises. In the event that you can compose informative articles in a new and enthusiastic manner, this kind of home-based work will be perfect for you.

Search Engine Optimization 

Another approach to exploit the work from home career chances of freelance work is to do search engine optimization for sites. This should be possible by arranging and executing methods on the site straightforwardly, for example, in the manner in which the site is planned and actualized. It can likewise be done by including content through articles composed with rich watchword nearness. Watchwords are a significant piece of search engine optimization and are regularly part of the provisional labor to be found on freelance project sites.

Article Content 

Freelance work at home career may likewise comprise of composing articles legitimately to be added to a specific site. This procedure is additionally a piece of search engine optimization feature Articles on the grounds that informative articles written in a new and connecting with style will attract traffic from the search engine results page and will keep guests at the site since they are inspecting the information. The articles ought to be set up regarding a matter that relates to the site content so as to speak to the specialty crowd. Such articles are frequently posted as projects on freelancing sites. Home workers can offer on these projects. let's have a look at highly in-demand freelancing skills.

Most Demanding Freelancing Skills

• Web and Mobile Development
• Internet Research
• Data Entry
• Web Designing 
• Accounting
• Graphics Designing
• Consultancy
• Recruiter
• Content Writer
• Editor

Let's have a look at top Freelancing job portals.

Most Popular Freelancing sites

1. Fiverr
2. Upwork
3. Freelancer.com
4. Envato Studio
5. PeoplePerHour
6. Toptal
7. Guru.com
8. DesignCrowd
9. Nexxt
10. DesignContest
11. TaskRabbit
12. crowdSPRING
13. Hireable
14. WriterAccess
15. 99Designs
16. Catalant
17. Bark
18. DesignHill
19. Skyword
20. Gigster

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Magento 2 Interview Questions and Answers

1. What is MVC Architecture?

The Model-View-Controller (MVC) framework is an architectural pattern that separates an application into three main logical components Model, View, and Controller. ... MVC separates the business logic and presentation layer from each other. It was traditionally used for desktop graphical user interfaces (GUIs).

2. Which command is used to enable or disable a Magento 2 module?

php bin/magento module:enable module_name

php bin/magento module:disable module_name

3. What technology does Magento 2 use?

Magento uses MySQL for database and PHP as a web server language.

Magento 2 uses PHP 7.0.2 up to 7.0.10

• 5.6.x;
• 5.5.x, for x>=22;
• 7.0.2 to 7.1.0, except for 7.0.5.
• 7.1.3+ 7.2.x (for Magento 2.3.0)
• 7.3 (for Magento 2.3.3)

For MySQL, it uses version 5.6 or 5.7.

1. Magento 2.0.x = MySQL 5.6 
2. Magento 2.1.x = MySQL 5.6 (For Magento 2.1.2 and higher, use MySQL 5.7) 
3. Magento 2.2.x  = MySQL 5.6, 5.7 
4. Magento 2.3.x  = MySQL 5.6, 5.7 

4. What is EAV?

The Entry, Attribute, Value model, also known as object-attribute-value or Open Schema, is a database or catalog management system that is used in Magento.

Entity–attribute–value model (EAV) is a data model to encode, in a space-efficient manner, entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest.

5. How can you write a custom module in Magento 2?

Say you the model name is ‘hosting’. You have to define it in app/code folder

It should be: app/code/VendorName/moduleName.

For example: app/code/MageHost/Hosting

Steps:

1. Create the folder of ‘hosting’ module
2. Create etc/module.xml file
3. Create etc/registration.php file
4. Enable the module

There are two possible locations for modules in Magento 2: the app/code folder and the vendor folder depends on your Magento installation.

Why are more programmers not freelance these days?

I have a job that I'm currently happy with. I work regularly and get paid regularly. Of course there's always too much things to do, but still, the work is mostly interesting and the workload is approximately constant and predictable. Hardly so with freelancing (think of work requests as a Poisson process, and how the stability of frequency depends on the average frequency; a cafeteria with 10 customers and 1 toilet is not linearly proportional to a cafeteria with 100 customers and 10 toilets, i.e. the queue is not similar).
Going freelance would require me to do all the marketing, selling, bureaucracy etc. boring and scary (but admittedly, important) stuff. Actually I don't think I could do it successfully. At least I would hate it.

People start working for companies because of other benefits you get from salaried jobs, social activities, girls, regular pay rise and of course tried and tested path for the most of us.

When you are freelancing, you are on your own, irregular project orders may be, bidding for projects can be confusing as in how much to bid, is it very high or very low. After some experience you start bidding accurately but that takes some time. While not having projects, loneliness makes you start thinking negatively. Many people who are freelancing I am sure are well organized and they know how to get the most of them. They are busy bees most of the day and they get to enjoy their flexible timings.

Ok, two myths there: 1) Pay - it may look like there are wide gaps but there are a lot of hidden costs to employing someone that a contractor or freelancer has to bear for themselves 2) No overtime. Really? It may not be called overtime but you're not liable to have to work any less hard.

On top of which - depending on location - employees get paid holiday and all sorts of other benefits (e.g. pensions, paid sick leave) that freelancers have to fund themselves (c.f. hidden costs above).

Further, a freelancer has to do all the stuff that programmers often struggle with - find business in the first place, manage the work they have, invoice, chase invoices, chase invoices some more (getting paid is much, much easier when the company runs a payroll every month), deal with taxes and expenses and capital allowances and all sorts of things that you tend not to have to worry about as an employee.


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PHP Web Application Development - Benefits of Hiring PHP Freelancer

Business owners are keen on putting themselves up on the World Wide Web by means of designing their websites in the most dynamic manner. And so, is introduced the role of a PHP expert programmer. Since PHP is considered as a tool for designing dynamic websites, the experts who are proficient in the designing of the portals using the PHP tools, are much in demand.

• Another reason for the demand of the PHP freelancer is that of the quick delivery as such a person is not required to be time bound. Since they are not answerable to other people in the offices, freelancers can complete the work as committed and this is of benefit for the web development, PHP Web Application Development - Benefits of Hiring PHP Freelancer.

• Freedom to work is perhaps the most important aspect of the PHP freelancer. By this means, webmasters can have the process of Ecommerce website development in a smooth manner without any hassles. Making Ecommerce websites entails a lot of effort and is considered a work of assimilating a number of tools related to PHP, html and loads of other plug-in and tools.

• It is up to the PHP expert programmer to handle different projects. Therefore, he can work on a particular project or can simultaneously handle more than one project at the same or different levels of development.

A PHP freelancer is one, who is not associated with any specific company. This means, this expert is at liberty to use a free hand in his work, thereby giving a work which is decided by the industry standards rather than any rules of some agency. People who work as PHP freelance programmer have the expertise to handle the requirements of the clients. Being free from the constraints of any particular agency, the freelancer is free to interact with the clients and can understand the needs of a particular website.


In the modern world, where technology is of paramount importance, the need to be technologically updated is immense. After internet, there has been no other development as prolific as the instruments to optimise the use of internet. Websites are the mainstay of internet portals and perhaps the lifeline of most businesses.



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What to Look For While Hiring Dedicated PHP Developers or PHP Freelancers ?

PHP Development Services in India - Qualities that you must look for while hiring dedicated developers:

• Ask how the number of hours they will devote to your project and make sure that they give regular work reports in case you have decided to hire dedicated PHP developers.

• Always choose a web development company as per your requirements. Suppose you need a programmer for an e-commerce site that it is more beneficial to choose a developer that has more experience in developing both custom and e-commerce sites.

• Ask about their PHP programming strategies and SEO strategy as the part of the proposal to compare it to other php application development companies in India.
• Ask for the total number of dynamic website developers that will be working on your project.You must ensure that who will own the rights of the website and the content after the completion of the project.
• Second and the most important step would be the years of experience of the web development company. Choose a PHP programming company that has a track record of 5 years or more. Examine the proficiency of dynamic website developers by asking questions about the development program.

• Nothing can describe the quality of the developer as good as his work, make sure to review their portfolio to judge the quality and expertise of the developer. You may also read client testimonials or ask for the reference of their clients and call to ask them about the quality of the service.

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