What is PHP?
PHP is a server-side scripting language that is especially suited for web application development including products and dynamic websites. PHP runs on the web server, processes the request, and returns the HTML document. PHP is a cross-platform language and it can run on all major operating systems, including Linux, Windows, and macOS. One can use PHP with all leading web servers such as Nginx, OpenBSD, and Apache. Some cloud environments also support PHP like Microsoft Azure and Amazon AWS.PHP is that it supports many databases, including MySQL, PostgreSQL, MS SQL, db2, Oracle Database, and MongoDB. PHP was created by Rasmus Lerdorf in 1994. It’s currently maintained by the PHP Development Team.
Who is a PHP Developer?
A PHP programmer is accountable for writing server-side web application logic building and programming. PHP developers develop back-end components, connecting the application with the other (often third-party) web services, and supporting the front-end developers by integrating their work with the application. Developing server side logic, definition and maintenance of the central database, and ensuring high performance and responsiveness is the main responsibility. Moreover, PHP developers are responsible for integrating the front-end elements built by other fellow developers. Therefore, hiring PHP developers who have a basic understanding of front-end technologies is better.
Average salary of PHP developers?
Average salary of PHP developers varies according to their programming experience in different countries. In United States, average wage of PHP programmer is 50K to 70K US$. In UK & Europe, its around 35K US$ to 50K US$. In India, it varies between 4 lacs INR to 15 Lacs INR and in other south asian countries, its little lower than this. You can find more details on payscale.com and other sites as latest records are published for 2022.
How to Hire PHP Developer in 2022?
Built in 1994 exclusively for web development purposes, the PHP open source programming language is still in high demand. With around 72% of market share, PHP development and PHP programmers are still in high demand among big companies and startups. Identifying the geography is first thing, one should plan. You must know if you are going to hire PHP developers in United States or Europe or India? After that, ensure that you have a standardized process of interviewing for a better evaluation of the candidates. Prepare a list of the most important questions on topics that you want to cover and draft possible answers to those questions. If you are hiring dedicated PHP developers from an offshore development company, then signup NDA to get things in place.
Benefits of hiring dedicated PHP developers
Built in 1994 exclusively for web development purposes, the PHP open source programming language is still in high demand. With around 72% of market share, PHP development and PHP programmers are still in high demand among big companies and startups. PHP web development empowers the companies to develop the dynamic applications at reasonable cost. Monthly cost of PHP developers is also relatively low and thus create affordable option for businesses.
Generic Interview Questions for PHP Developers
Generic interview questions for -
- Junior PHP Developers
- Mid Level PHP Developers
- Expert PHP Developers
Answer: It is the basic principle of OOP (object oriented programming). One can define base class (for example) animals and it can then be extended by other classes like dog, cat and take part of the behaviour from the parent class.
Answer: Visibility keywords are public, private and protected.
Answer: Unlink() deletes the given file from the file system. Where unset() makes a variable undefined from memory.
Answer: It will output the content of variable into document.
Answer: It is not possible to send an Ajax request if the protocol or host are different. This is called CORS and is checked by the browser.
Answer: Cant say 100%. To understand it, one needs to understand how objects are instantiated.
Answer: Technology that caches objects in memory and the application can get to them really fast. It is the basis in scaling larger PHP web applications.
Answer: The PHP split() function splits the string into an array by regular expression.
Answer: It is a set of PHP extensions that provide a core PDO class and database, specific drivers. It provides a vendor-neutral, lightweight, data-access abstraction layer. Thus, no matter what database we use, the function to issue queries and fetch data will be same. It focuses on data access abstraction rather than database abstraction.
Answer: Null coalescing operator returns its first operand if it exists and is not NULL. Otherwise it returns its second operand.