What are the tough interview questions for a PHP developer?

All PHP code must be included inside one of the three special markup tags ate are recognised by the PHP Parser. The unlink() function is dedicated to file system handling. In_array used to checks if a value exists in an array. We can send Middle PHP developer job 1024 bytes using GET method but POST method can transfer large amount of data and POST is the secure method than GET method . The $var is a normal variable with the name var that stores any value like string, integer, float, etc.

The function mysqli_num_rows() returns the number of rows in a result set. The result set can be handled using mysqli_fetch_array, mysqli_fetch_assoc, mysqli_fetch_object or mysqli_fetch_row. The most common and used way is to get data into a format supported by Excel. For example, it is possible to write a .csv file, to choose for example comma as a separator between fields and then to open the file with Excel.

The imagetypes() function is an inbuilt PHP function which is used to give the image types supported by the current version of PHP inbuilt installed library. The primary difference between “echo” and “print” in PHP is that “echo” is a language construct, and “print” is a function. “echo” also has slightly better performance and is more succinct, making it preferable in situations where performance and size matter. The constant() function is a valuable tool that can be used to define a constant. This value remains unchanged throughout a script’s lifetime and can be used as a reference for various calculations.

Different functions allow you to read all file data, read data line by line, and read data character by character. The area of the temporary record is controlled by a setting in the php.ini document called session.save_path. Sessions generally store temporary data to allow multiple PHP pages to offer a complete functional transaction for the same user. PHP Engine creates a logical object to preserve data across subsequent HTTP requests, which is known as session.

Top PHP Interview Questions

PHP magic constants are predefined constants which changes on the basis of their use. They start with a double underscore and end with a double underscore . On OnClick event of a label in the form, a JavaScript function can be called to submit the form. Its’s 2018, being a good slow typer is not a bottleneck to become a good developer. Although it was pretty fun and easy, I just thought the process was kinda childish. There is a programming exercise that you will code a car parking management.

All variables in PHP are denoted with a leading dollar sign ($). The PHP parsing engine needs a way to differentiate PHP code from other elements in the page. The mechanism for doing so is known as ‘escaping to PHP’.

Aside from these, PHP frameworks are used for web development. PHP and Javascript cannot directly interact since PHP is a server side language and Javascript is a client-side language. No direct interaction is possible between JS and PHP because, while the former is a client-side language, the latter is a server-side language. An indirect interaction between the two leading programming languages can happen using exchanging variables. PHP is a powerful scripting language used to create websites and web applications. It has many features, one of which is overloading and overriding.

What is the difference between for and foreach loop in PHP ? The for loop is considered to be openly executing the iteration whereas the foreach loop hides the iteration and visibly simplified. PHP variables are case-sensitive i.e. $sum and $SUM are treated differently.

Technical Interview

So the use of parentheses is not required with the argument list. In dynamic websites, content of script can be changed at the run time. Its content is regenerated every time a user visit or reload.

• PHP can be quite tricky, therefore you need candidates with a solid technical background and excellent coding skills.
• As a Senior PHP Developer, you will be responsible for the development of web-based applications and components using PHP.
• You can use isset() function to check if a cookie is set or not.
• Once these concepts were grasped, we moved on to more complex topics like object-oriented programming and database integration.
• It receives data from forms to generate the dynamic page content.

If the connection is successful, write a SQL query to create a database and store it in a string variable. Overloading is defining functions that have similar signatures, yet have different parameters. Overriding is only pertinent to derived classes, where the parent class has defined a method and the derived class wishes to override that method. In PHP, you can only overload methods using the magic method __call.

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Each of them has answers, as well as explanations of how we got the answers and how you can apply that same approach to other problems in the future. It starts with your recruiter or hiring manager calling the applicant. During the initial interview, your recruiter will check if they are interested in the job position. They will also gauge if the applicants are fit for the said position. Also, during this call, they will do a simple background check by asking applicants about themselves and job experiences. Although PHP is a flexible programming language, it still has limitations.

The final keyword prevents the class from extending. When used with a method, the final keyword prevents it from overriding. You need to determine the number of times the loop is https://wizardsdev.com/ to be executed when using the for a loop. However, you need not do so while using the for each loop. It is possible to configure a client to speak to a distinct set of instances.

one ring bells at 20 sec, second will 40 sec and third will 60.at what time these three will ring together?

You can answer by listing some technical skills and explaining why they are important for senior PHP developers. As a Senior PHP Developer, you will be responsible for the development of web-based applications and components using PHP. You will also be required to participate in project planning, contribute to code reviews, and provide technical support for our team of developers. Session variables are stored in associative array called $_SESSION[].

Use examples from past projects where you’ve used coding standards or best practices to ensure that future developers can easily read, edit and update your work. This question allows you to demonstrate your knowledge of PHP and how it can be used in a professional setting. You should explain the benefits of OOP for PHP developers, including its advantages over other programming languages. Use examples from past projects to describe your process for testing code before deploying it to the live site. My approach was to break down the fundamentals of PHP into small, manageable chunks that could be easily understood.

The value of the variable input is a string 1,2,3,4,5,6,7. How would you get the sum of the integers contained inside input?

Therequire_once()statement can be used to include aphpfile in another one, when you may need to include the called file more than once. So, require_once() is recommended to use when you want to include a file where you have a lot of functions. The Require() function is also used to put data of one PHP file to another PHP file. If there are any errors then the require() function produces a warning and a fatal error and stops the execution of the script.

The GET and POST methods are two distinct ways of sending information to the server. The GET method is used when requesting data, while the POST method is used to submit data such as form information. GET, and POST are two of the most basic methods used in web communication between a server and a client.

PHP Developer Interview Questions

We have had a candidate once and I reviewed some of their code on screen share. I remember that the candidate had some confusion and said that Arrays is the same Hash Maps which shows lack of understanding of data structures. We are find highly skilled PHP developers who lack understanding of data structures. Unfortunately the nature of business requires our senior developers to have a good command on the basics of programming apart from knowing a language or a framework. I hope that this would explain why our interviewers might ask very basic questions to highly experiences candidates.