Top PHP Interview Questions and Answers

Technical interviews, especially those pertaining to a coding job, are quite different from the other interviews. Your assessment in these interviews is based on your coding skills, your logical approach in suggesting a solution and your efficacy in writing the code. Technical interviews can make you nervous and to overcome this anxiousness; you need to be fully prepared.

When it comes to preparation for a PHP interview, you not only have to take care of the practical scenarios; you should also be versed of the theoretical aspects of PHP. 

To boost your confidence while preparing for a PHP interview, we have selected a list of PHP interview questions, these top PHP interview questions and Answers are frequently asked by the industry recruiters as they cover the practical as well as theoretical aspects PHP. 

Take a look at the PHP interview questions. These questions will cater the need of both freshers and advanced candidates. 

Let’s start.

1. What is PHP and What is its use.? 

PHP stands for Hypertext Preprocessor. It is one of the most popular and widely acknowledged server-side scripting language. It is used to generate the content on the web-page. Some of the key usages are:

• It is used to write and query the database.
• It is used for processing the user inputs.
• It is used to create structured web applications.

2. Name some of the popular Content Management Systems (CMS) in PHP.

CMS stands for Content Management System. It facilitates the users to create and modify websites without being versed on the programming.   

Most popular CMS these days is WordPress. Some of the other useful and feature rich CMSs are Joomla, Drupal, Shopify, Magento 

3. What is a PHP framework? Name some popular frameworks in PHP.

PHP frameworks streamline the development of web applications written in PHP by providing an essential structure to build the web application; in other words, PHP framework provides a quick pattern to developing websites. These frameworks follow the MVC pattern. It divides the whole code into three parts as: Modal, View and Controller.

Modal: Represents the backend details and other data.

View: Interacts with the user and serves user requests.

Controller:  Works as a mediator between view and modal.

Some most popular PHP frameworks are:

1. Laravel
2. CodeIgniter
3. Symfony
4. Zend
5. Phalcon
6. CakePHP
7. Yii
8. FuelPHP

4. What is meant by variable variables in PHP?

When we use the value stored in one variables as a name of another variable, this is called a variable variables. It is denoted by $$. 

CODE:

<?php
$var1 = “php_interview_questions”;
$$var1 = ‘top_20’;
echo $var1.”<br>”;
echo $$var1;
?>

Output:

5. Explain some of the PHP string functions.

A PHP string can be a series of letters, numbers, special characters and arithmetic values. It can also be a combination of all. A quotation mark (‘’) is used to define the string and is encloses the string characters.  

Here are some of the frequently used string functions:

1. PHP String Length Function: strlen()

      The PHP strlen() function returns the length of string. It is an inbuilt function of PHP.

    CODE:

<?php
$str=”Ram and Shyam are best friends”;
$length=strlen($str);
echo “The length of the given string is : <strong>$length</strong>”;
?>

OUTPUT:

Learn more about strlen() function.

If you are looking for a complete list of top PHP interview questions and answers, you can visit PHP interview questions and answers. 

These questions will cater the preparation needs for all the candidates ranging from freshers, intermediator and advanced.

All the best with your preparation.

PHP Language: Advantages and Disadvantages

PHP Language Definition –

PHP means “Hypertext Preprocessor”. PHP is an HTML-inserted Web scripting language. This tells that PHP code can be used into the HTML of a Web page. At the point when a PHP page is gotten to, the PHP code is perused or “parsed” by the server the page lives on. The yield from the PHP capacities on the page is regularly returned as HTML code, which can be perused by the program. Since the PHP code is changed into HTML before the page is stacked, clients can’t see the PHP code on a page. This makes PHP pages sufficiently secure to get to databases and other secure data.

This article will give you a basic understanding of pors and cons of PHP, if you wish to learn in detail about PHP than checkout the article at Coding Tag about advanced PHP interview questions and answers.

A great deal of the sentence structure of PHP is obtained from different languages for example, C, Java and Perl. In any case, PHP has various one of a kind highlights and explicit capacities also. The objective of the language is to permit Web engineers to compose powerfully produced pages rapidly and without any problem. PHP is additionally incredible for making database-driven Web destinations. On the off chance that you might want to become familiar with PHP, the official site is PHP.net. read more details about PHP Tutorial for Beginners and Experts from Coding Tag.

 

Advantages of PHP Programming Language-

Accelerate custom web application development

These days, PHP software engineers need to compose web applications dependent on complex business necessities. In like manner, they need to investigate approaches to cause the web application to convey more extravagant client experience. The apparatuses, highlights, and code pieces gave by PHP structures help designers to quicken custom web application advancement.

Easy web application maintenance

In contrast to other programming dialects, PHP doesn’t stress on code meaningfulness and practicality. The PHP structures improve web application advancement and upkeep by supporting model-see controller (MVC) design. The designers can exploit MVC engineering to separate a web application into models, perspectives and controllers. They can utilize a MVC structure for PHP to keep the application’s UI and business rationale layers isolated.

No reason to compose extra code

PHP, in contrast to other programming dialects, doesn’t permit developers to communicate ideas without composing longer queues of code. Consequently, the PHP software engineers need to compose long and complex code while adding highlights or usefulness to a site. The PHP systems decrease coding time essentially by giving code age highlights. The code age highlights gave by certain PHP structures empower developers to keep the source code of web application perfect and viable.

 

php interview questions

Work with databases all the more effectively

Most PHP structures permit developers to work with various generally utilized social databases. A few structures further improve database activities by giving item social mapping (ORM) frameworks. The software engineers can exploit the ORM frameworks to perform database activities without composing long SQL code. The ORMs even permits developers to compose object code straightforwardly in PHP programming language.

Perform unit testing proficiently

While building a custom web application, engineers need to perform unit testing routinely to assess their individual units or segments. A huge level of web designers uses PHP Unit to perform unit tests rapidly and productively. Notwithstanding being an article arranged unit testing structure for PHP, PHP Unit further causes designers to compose and run unit tests by giving coding help. Numerous PHP systems support PHP Unit locally and empower software engineers to perform unit testing easily.

No reason to increase web development cost

As an open-source server-side programming language, PHP causes clients to shorten web improvement cost essentially. The engineers additionally have an alternative to browse a few open source web structures for PHP. They can even profit the highlights and devices gave by these open source PHP structures accelerate custom web application advancement without expanding venture overheads.

 

Disadvantages of PHP Programming Language –

Software engineers need to learn PHP systems rather than PHP

The PHP structures empower software engineers to add usefulness to a web application without composing extra code. In any case, the developers need to invest some time and energy to gain proficiency with the PHP structure. They can even learn and utilize certain systems without being capable in PHP coding.

Nature of PHP structures varies

Most broadly utilized PHP structures are open source and free. Subsequently, the web engineers can exploit these web systems without expanding the undertaking cost. In any case, the network quality of individual systems varies. Subsequently, some PHP structures need fast and satisfactory help.

Lack of alternative to adjust core behavior

Notwithstanding demonstrating a fundamental structure for web application advancement, the PHP systems further quicken custom web application improvement. In any case, the designers despite everything do not have any choice to make changes deeply conduct of these structures. A few systems even necessities designers to utilize explicit instruments or receive a specific web improvement design.

Influence Speed and performance of sites

Most PHP systems accompany vigorous highlights and instruments to quicken the advancement of enormous and complex sites. Yet, web designers may not require these propelled highlights while assembling little or basic web applications. Likewise, these extra highlights regularly sway the exhibition and speed of sites antagonistically.

We hope that you got the better understanding of advantages and disadvantages of PHP. If you are preparing for an interview make sure to check out the list of top PHP interview questions and answers at Coding Tag.

Top 30 Perl Interview Questions 2020

Coding Tag offers you the PERL interview questions with detailed explanations of every section covering PERL language basics that are required before facing a PERL developer interview.

Top 50 HTML Interview Questions

After the study, the toughest stage is how to crack an interview. Going for a job interview makes us feel like we are back in school examination. In an interview, our job is to show our hidden talent and convince a recruiter that we have a required talent.

For this, we have limited time to provide a true representation of our skills, experience, and knowledge to recruiters. To impress a recruiter, we have discussed top HTML interview questions that are listed below:

 

HTML INTERVIEW QUESTIONS AND ANSWERS

1. What is HTML?

HTML is a Hypertext Markup Language used for creating various web pages and web applications layout. This language is not so difficult to learn and understand,

The HTML file must be saved with an extension: 

Xyz.html

Xyz.htm

It consists of some syntax and code words the same as other computer languages. The HTML file must be saved with .html extension. read more about html

2. Describe the different versions of HTML?

HTML has different versions from beginning to till date like:

1. 0  (original)
2. 0  (Web Design Features)
3. 0
4. 2  (WILBUR)
5. 0  (COUGAR)

And the latest version right now is HTML 5

3. What is a DOCTYPE?

DOCTYPE means Document Type Declarations. It is used to specify the web browsers that which types of documents it will receive. In the HTML program,All HTML documents must start with a < !DOCTYPE >  declaration, It is an information to the browsers about the document type and language.

<!DOCTYPE html>

4. One of the core concepts in the  Html interview question for freshers is to explain HTML tags?

Till now HTML is on the same core concept of tags as there in original HTML1.0.HTML tags consist of three main elements which are opening tag, content, and a closing tag, in the end. The opening and closing tags are written in the angle brackets like <>.

The opening tag represents the initiation of the start command and the closing tag represents the end of the command, hence it comes with the slash. See the syntax below:

<tag> content </tag>

There are some tags in HTML which don’t need to be close

For example <br> , <hr>…

 

2020 ADVANCED HTML INTERVIEW QUESTIONS AND ANSWERS

5. How many types of HTML tags?

Basically HTML tags are in two types paired and unpaired tag. As discussed above paired tags are those which have both opening and closing tag for example  <p> </p>, <h1> </h1>, <b> </b>, <i> </i>, etc.

Whereas the unpaired tags are <br>,<img>, <hr> ,etc .

The unpaired tags are <br>, <img>, etc.

6. Name the list tags which are used to design a web page?

List tags are used to design a systematic web page. Here are the list tags :

• ordered list
• unordered list
• definition list
• menu list
• directory list

All these tags can be used to compose a web page.

7- How to create a text on a web page that allows sending an email when clicked?

To change the text into a clickable link to send an email, use the mail to command within the <href> tag. The format is as follows:

<a href=”mailto:hello @codingtag.com”>Clickable Text</a>

Read more article: TOP HTML INTERVIEW QUESTIONS  AND ANSWERS IN 2020 

Top 30 SQL Interview Questions

SQL is probably used for database interaction and management. Nowadays, SQL skills are essential for getting jobs, especially in the web development field. In this blog, I am going to introduce a set of SQL interview questions to cope up with the growing competition in IT markets.

Let’s Continue !!

1) What is DBMS?

DBMS is the Database Management System, It is the program for managing the file and the data of the file in the database stored in the system for any further use which includes adding, delete, and modify data. It provides a systematic method to perform modification, administration, and retrieval. Data present in the DBMS’s applications are stored as a file.

 

sql-interview-questions

2) What is RDBMS?

A Relational Database Management System (RDBMS) is a DBMS designed. This helps to store data in a structured format manner using tables having rows and columns for fast access. Moreover, it offers the relational operators for performing data manipulations across the tables.

3) What do you mean by SQL?

SQL (Structured Query Language) is known as the standard language to interact with the database. It is designed to accomplish tasks like retrieval, insertion, and deletion. It is the program for managing the data of the database stored which includes adding, delete, and modify data in a Table.

4) What do you mean by “Table” in a Database?

A table is known as a database object that can be used for storing the record in terms of rows and columns.

5) What is “Record” in a Database?

A record is known as “the row of the table that contains arranged sets of interrelated data”. It is a collection of fields about topics with many credentials in multiple rows and columns The database record can be thought of as a row of information within a database table.

Example

< 402 Cricketer 405>

6) What do you mean by the “database” in DBMS?

Well, Database is a set of data arranged in such a way that a computer can easily be able to fetch that particular value in a matter of time. It reduces the amount of time of computer checking or sorting methods functions for particular data.

7) What are the advantages of using a Database?

• Time-saving – Fetching a single record can be done in just a few clicks. It can merge database records in less time with relations to it.
• More handy information – Creating and running a query can be done easily for distinct answers or records from the database.
• Capacity relates data – Different Data and sources of information can be linked together to review performance.
• Ability to stimulate mail, email, and social media – Mass customization in terms of a specific response to potential customers depending on interpreted customer information. Mail and email operations can be easily driven to customers.

8) Name some of the applications using DBMS for their data storages?

• Reservations systems
• Telecommunications
• Banking
• Sales
• Scientific applications

9) What are the keys that are present in DBMS?

There are six key founds in DBMS to manage the table. They are:

* Candidate key

* Foreign key

* Primary key

* Secondary keys/Alternate key

* Composite key

* Super key

10) How can you maintain and identify relations between two or more than two tables in DBMS?

Keys are used in maintaining the relationship between tables.

Read More – Top 30 SQL Interview Questions with Coding Tag

Updates on JavaScript Interview Questions for 2020

1-     What is JavaScript?

Javascript is a scripting language, which is everywhere come installed on every modern web browser, It helps to create really beautiful and crazy fast websites, It is also considered as an object-based programming language.

2-     What are the defined Data types in Javascript?

The different types of JavaScript data types are:

• Boolean: Two possible values (true and false)
• Number:  Integer, float point.
• String   :   Double, single quotes, and backticks.
• Object  :
• Undefined

3-     Name the company that introduced JavaScript?

A company that proposed JavaScript is “Netscape” which is a software company.

updates javascript interview questions 2020

4-     How to read and write a file in JavaScript?

We can read and write a file in JavaScript by following two methods, they are

• We can use JavaScript extension
• file=fopen(getScriptPath(),0); The function fread() can be used for reading file contents
• file = fopen(“c:\examplefile.txt”, 3); opens the file for writing.
• str = fread(file,flength(file) ; The function fwrite() can used to write the contents to the file.

Also, read an extensive list of updated top JavaScript Interview Questions for more such answers.

5-    What is negative infinity?

Negativity Infinity is a number in javascript which can be derived by dividing negative number by zero.

6-  How to add new elements dynamically?

<html>

<head>

<title>Add</title>

<script type=”text/javascript”>

function addNode() { var newP = document.createElement(“p”); var textNode = document.createTextNode(” This is a new text node”);

newP.appendChild(textNode); document.getElementById(“firstP”).appendChild(newP); }

</script> </head>

<body> <p id=”firstP”>firstP<p> </body>

</html>

7- What is this keyword in JavaScript ?

There are four rules applies to this in order to know which object is referred by this keyword:

1. Global Scope
2. Object Method
3. Call() or apply() method
4. Blind() method

Conclusion

Well, I am wrapping up with this. You can read these questions that will surely help you to crack your interview. Get top 30 JavaScript interview questions for more read

Advanced PHP Interview Question 2020

 

Do you want to be a software engineer but finding it difficult to crack the interview? You might have an unnerving experience while facing interviews for being a developer. Some of the most frequently asked questions are listed below:

Frequently Asked JavaScript Interview Questions in 2020

JavaScript has been one of the most in-demand languages in the niche of website development. If you also have various lined up interviews for JavaScript, then we have prepared this blog for you. In this blog, the most frequently asked JavaScript Interview Questions have been enlisted along with their appropriate answers. Note that these questions and answers have been prepared for both fresher as well as experienced to tackle the technical interview sessions.

Top SQL Interview Questions to Prepare for 2020

Are you preparing for SQL as your career choice and don’t know where to start? Well, then you are in the right place! In this blog, we have prepared a list of SQL Interview Questions that are most likely to be asked by the interviewers. The list of questions contains all the basic to advance level questions to help the students prepare thoroughly for the technical interview.

Ethical Hacking Interview Questions and Answers in 2019

With the emergence of cyber-crimes, the career scope for Ethical Hacking is also emerging. If you are also looking for an opportunity to become an ethical hacker, we have prepared for you a list of most frequent Ethical Hacking Interview Questions which are asked by the interviewer, along with the answers. Note that these interview questions will help both beginners as well as experienced applicants to crack the ethical hacking interview.

1. Who is known as a Hacker?

A hacker is a person who exploits the vulnerabilities of the computer to carry out some illegal tasks such as data breach, unauthorized modifications, etc.