Questions And Answers For Advanced PHP Interviews

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We’ve compiled a list of 135 real-world scenario-based PHP interview questions for freshers and professionals in this article. Interview Questions And Answers For Experienced PHP Developers. This list includes PHP interview questions for PHP developers with 1 year, 2 years, 3 years, 4 years, and 5 years of experience, as well as experienced PHP programmers.

Questions for PHP Interviews

  • Freshers’ PHP Interview Questions and Answers
  • 1 Year Experience PHP Interview Questions and Answers
  • 2 Year Experience PHP Interview Questions and Answers
  • 3 Year Experience PHP Interview Questions and Answers
  • Interview Questions And Answers For PHP Developers With 4 Years Of Experience
  • 5 Year Experience PHP Interview Questions and Answers

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  • Questions, Answers, and Explanations for PHP mySQL Web Programming Interviews: PHP mySQL FAQ
  • You’ll Be Asked During Your PHP Interview
  • Web Development with PHP and MySQL
  • PHP, MySQL, and other programming languages
  • Web Development with PHP6, Apache, and MySQL (WROX)
  • Web Development with PHP and MySQL

Frequently Asked PHP Interview Questions

  1. What exactly is PHP?
  2. What is PHP, and why does it exist?
  3. Why was PHP dubbed “Personal Home Page”?
  4. What is the difference between PHP and HTML?
  5. What exactly is a PHP 5?
  6. What does PHP stand for, and what does it do?
  7. What’s the difference between PHP and Javascript, and how do you tell the two apart?
  8. What exactly is the distinction between HTML and PHP?
  9. What are some of the benefits of using PHP?
  10. What’s the difference between Python and PHP, and how do you tell the two apart?

Questions And Answers For PHP Interviews

This is a one-stop shop for basic to advanced PHP technical interview questions and answers for everyone from beginners to experienced PHP programmers. Let’s talk about it. To assist senior PHP developers, these 135 advanced PHP interview questions and answers were written by PHP experienced professionals.

Freshers’ PHP Interview Questions and Answers

1st Question: What is PHP?

PHP (Hypertext Preprocessor) is a widely used open source general-purpose scripting language that is particularly well suited for web development and can be embedded in HTML.

Question #2: What is PHP and why does it exist?

The PHP runtime executes any PHP code in a requested file, which is typically used to create dynamic web page content or dynamic images for use on websites or elsewhere. Answer # PHP is a general-purpose scripting language that is particularly well suited to server-side web development, in which case it runs on a web server.

Question # 3: Why is PHP referred to as a “personal home page”?

PHP is known as a hypertext pre-processor because its libraries have already been compiled. When a user types a php page into the browser’s address bar, the request is sent to the server, which interprets the php files and returns a response in the form of HTML.

Question # 4: How does PHP differ from HTML?

PHP is a scripting language that can be used to create HTML-based web pages. It isn’t a programming language in the traditional sense. HTML is used on a client computer (the system that is used to view the page). HTML is a programming language that tells a browser how to display text and other objects in a browser window.

5) What exactly is a PHP 5?

PHP is a popular, free, and efficient alternative to Microsoft’s.NET Framework. PHP 5 is a server scripting language that can be used to create dynamic and interactive Web pages.

Frequently Asked PHP Interview Questions

6) What exactly is PHP and what does it do?

However, PHP is capable of much more. Answer # Because PHP is primarily used for server-side scripting, you can use it to collect form data, generate dynamic page content, and send and receive cookies, just like any other CGI program. Scripting on the server. PHP scripts are used in three different areas.

7) What is the distinction between PHP and Javascript?

Simply put, JavaScript codes, such as catchy animations or simple calculations, are executed by your web browser. All of the processing is done by your browser. Answer # Client-side scripting is done with JS (except in node.js), and server-side scripting is done with PHP. PHP is run on the server, which is where your website is stored.

8) What is the distinction between HTML and PHP?

HTML is used on a client computer (the system that is used to view the page). HTML is a programming language that tells a browser how to display text and other objects in a browser window. It isn’t a programming language in the traditional sense. PHP is a scripting language that can be used to create HTML-based web pages.

Questions And Answers For PHP Interviews

9) What are some of the benefits of using PHP?

There are, however, a variety of languages that are used in web development and programming. Answer # PHP Programming’s Benefits PHP (Hypertext Pre-Processor) is a widely used server-side web programming language for web development.

Question # 10) How do Python and PHP differ from one another?

# PHP is a programming language that’s easy to learn and use.

PHP Interview Questions for Beginners

Why do we use PHP, question # 11?

At Bluelinemedia, we use MySQL because it is also a free language, and it makes sense to use PHP. Answer # One of the advantages of PHP is that it can work with a variety of database languages, including MySQL. An Apache server, which is also free to license, is compatible with both PHP and MySQL.

Questions And Answers For PHP Interviews

Question # 12) In PHP, what is a session?

Question # 13: Why does Facebook continue to use PHP?

Facebook isn’t the only social media platform that doesnR Facebook continues to use PHP, but it has developed a compiler for it so that it can be converted to native code. # Facebook’s technology stack includes applications written in a variety of languages, including PHP and others.

1 Year Experience PHP Interview Questions and Answers

Question # 14) What is PHP and how does it work?

The PHP program interacts with the web server, which is the program that distributes web pages to the rest of the world. You request a file, and the web server, which happens to be running PHP, responds with HTML, thanks to PHP programming.

Questions And Answers For PHP Interviews

Question # 15) Is it possible to combine PHP and Javascript?

As a result, when creating web pages, we can use a combination of HTML, Javascript, CSS, and PHP. If you need to use a scripting language like PHP after the page has been loaded into the browser, you must either refresh the page or use Ajax to request additional server-side processing.

Question # 16) What is the purpose of using Javascript in PHP?

It’s the PHP is a server-side language that is commonly written in-line in the same files as HTML and Javascript. A client-side language is Javascript. The main distinction is not between PHP and JavaScript.

Question # 17) What is the primary distinction between ASP.NET and PHP?

ASP.NET is a programming framework, whereas PHP is a programming language. PHP is platform independent (and typically runs on Linux servers), whereas ASP.NET is designed for Windows machines. C#, as well as other languages like J#, may be used in ASP.NET websites. PHP is interpreted, whereas ASP.NET is compiled.

Questions And Answers For PHP Interviews

Question # 18) How does PHP handle sessions?

The session_id cookie is used by the server (PHP) to determine which file belongs to that user. When a user’s session is created, the session id is sent to him. It’s saved in a cookie (called PHPSESSID by default), which the browser sends to the server with each request.

Question # 19) In PHP, how do you end a session?

If you want to explicitly terminate a user’s session, answer #

Question # 20) What are the benefits of using PHP with MySQL?

It’s a dependable, powerful, and stable solution with advanced features such as the following:

  • Data Protection
  • Scalability on Demand
  • High-Efficiency
  • 365 days a year Uptime is an important factor.
  • Transactional Support in Its Complete Form
  • Complete Workflow Management
  • TCO (Total Cost of Ownership) is lower.
  • The Open Source Community’s Flexibility

Frequently Asked PHP Interview Questions

Is Java better than PHP? Question # 21) Is Java better than PHP?

PHP is a client-side scripting language, whereas Java is a server-side scripting language. Answer # When it comes to the benefits provided, PHP and Java are very similar, but they are also very different. PHP code is executed on the server, whereas Java code is executed on the client’s computer.

Question # 22) How do I set up PHP on my computer?

The Manual Installation Procedure is the answer # here.

www.php.net/downloads.php has the most recent PHP 5 ZIP package. The first step is to download the files.

Step two is to extract the files.

Step 3: edit the php.ini file

Step 4: Set the path environment variable to C:php.

Configure PHP as an Apache module in step 5.

Step 6: Put a PHP file to the test

Question # 23) What is the purpose of a PHP session?

After the session has started, PHP will populate the $_SESSION superglobal with any session data. Session IDs are sent to the browser via session cookies and are used to retrieve previously saved session data. This can be used to keep track of state information between page requests.

Question # 24: In PHP, how long does a session last?

This is the correct answer. It will take 1440 seconds (24 minutes) to complete the session.

25. What is the purpose of PHP and Mysql?

It’s open source, free, and server-side (the code runs on the server). # The most widely used scripting language for web development is PHP. MySQL is a Structured Query Language (SQL)-based Relational Database Management System (RDBMS).

Is jquery better than Javascript? Question # 26) Is jquery better than Javascript?

You might be surprised to learn that JavaScript and jQuery are interchangeable. In a nutshell, jQuery is a collection of JavaScript libraries created to make HTML document traversing, animation, event handling, and Ajax interactions easier.

What is the difference between interpreted and compiled languages? Question # 27) What is the difference between interpreted and compiled languages?

In general, compiled code can be run directly by the computer. Answer # A better example would have been Java (interpreted) and C (or C++) (compiled).

Question # 28) In PHP, how do cookies work?

A cookie is frequently used to identify a user. A cookie is a small piece of data that the server stores on the user’s computer.

Question # 29) How do I keep PHP up to date?

Upgrading Your PHP Version:

  1. Log in
  2. In the Software section, click the PHP Configuration button.
  3. To save your php configuration, click the Update button.

Question # 30) In PHP, what is the difference between session and cookies?

When compared to cookies, sessions have the ability to store a lot of data. Answer # A session is a server-side global variable. When the browser is closed, the session values are automatically deleted. A unique id is assigned to each session and is used to retrieve stored values.

What is in PHP 7? (Question # 31)

Question # 32) In PHP, what is a NULL value?

In the PHP world, apparently uninitialized variables have the Null value, and setting a value on one of these variables returns FALSE.

Question # 33) In PHP, what is a trait?

In single inheritance languages like PHP, traits are a mechanism for code reuse. A trait is designed to alleviate some of the drawbacks of single inheritance by allowing a developer to freely reuse sets of methods across multiple independent classes in different class hierarchies.

Question # 34) What is the PHP function is_null()?

The is_null () function is used to determine whether or not a variable is NULL. Mixed : A parameter that accepts multiple (but not necessarily all) types is marked as mixed. If var_name is null, returns TRUE; otherwise, returns FALSE.

Questions And Answers For PHP Interviews

What is the difference between null and empty in question #35?

Null has no bounds and can be used for string, integer, date, and other database fields. # An empty string is a value, but it’s just that: it’s empty. ’null’null’n A database’s null value is unique.

2 Year Experience PHP Interview Questions and Answers

Question # 36) In PHP, what is a closure?

Closure can be thought of as an object-oriented approach to using anonymous functions. The anonymous function in the preceding code actually returns a closure object, which is assigned to and called using the variable $string. An anonymous function is represented by an object called a closure.

Question # 37) In PHP, what is final?

Answer # In PHP 5, the final keyword was introduced, which prevents child classes from overriding a method by prefixing the definition with final. It is impossible to extend a class that is defined as final.

Questions And Answers For PHP Interviews

What is Var_dump? (Question # 38)

Recursively exploring arrays with values indented to show structure. It also identifies which array values and object properties are referred to. # The var_dump function displays structured information about variables and expressions, such as their type and value.

What is the difference between null and undefined? Question # 39) What is the difference between null and undefined?

Undefined and null are also two different types: undefined is a type, whereas null is an object. Null, on the other hand, is a value assigned to a variable. # undefined indicates that a variable has been declared but not yet assigned a value. It can be assigned to a variable as a no-value representation.

Questions And Answers For PHP Interviews

Question # 40) In PHP, what is the purpose of a callback?

Native functions such as array_map, usort, preg_replace_callback, and others use them. # PHP callbacks are functions that PHP can use to call them dynamically. The various ways to create a callback function in PHP and use it with native functions are listed below.

Questions for Advanced PHP Interviews

Question 41) In PHP, what is a lambda function?

A lambda function that is aware of its surroundings is called a closure. To summarize, a lambda function is a PHP function that can be stored in a variable and passed as an argument to other functions or methods.

Questions And Answers For PHP Interviews

Question # 42) In PHP, what is overriding?

Answer # Overloading is the process of creating functions with similar signatures but different parameters. Overriding is only relevant to derived classes when the parent class defines a method that the derived class wants to override. Only the magic method __call can be used to overload methods in PHP.

Question #43: In PHP, what is encapsulation?

The second benefit of encapsulation is that by providing setter and getter methods, you can make the class read-only or write-only. In PHP, encapsulation is an Object Oriented Programming (OOP) concept. Encapsulation is the process of encapsulating data into a single unit. The best example of encapsulation is the capsule.

Question # 44) In PHP, what is a boolean?

A Boolean value can be found in one of two states. # PHP Booleans is the answer. In programming, these are referred to as True or False values. False is usually assigned a value of zero, while True is assigned a value of one.

What is the purpose of the Print_r function in PHP?

prinf is a function that accepts at least one string and a format style and returns the length of the output string. They’re both linguistic constructs. The print_r() function is used to display the array in a human-readable format. Print returns 1 and echo returns void.

Question # 46) In PHP, what is the purpose of the anonymous function?

Anonymous functions, also known as closures, allow you to create functions that don’t have a name. The Closure class is used to implement anonymous functions. They’re most useful as the value of callback parameters, but they can also be used for a variety of other things.

Question # 47) In PHP, what is polymorphism?

# Polymorphism is a long word for a very straightforward concept. Polymorphism is an object-oriented programming pattern in which classes have different functions but share the same interface.

Question # 48) What is the purpose of the PHP magic function?

Question # 49) In PHP, what is the purpose of return?

Returns program control to the calling module in answer # (PHP 4, PHP 5, PHP 7) The execution resumes after the called module’s expression’s expression’s expression’s expressionR

Question # 50) In PHP, what is the purpose of die?

The exit() function is an alias for this function. # The die() function exits the current script and prints a message.

Interview Questions for PHP Developers

Question # 52) What is the best way to write a comment in PHP?

The multi-line PHP comment is similar to the HTML comment in that it can be used to comment out large blocks of code or to write multiple line comments. ” is the start of a multi-line PHP comment.

What is the difference between $message and $$message in PHP? Question # 53) What is the difference between $message and $$message in PHP?

$$message is a variable whose value is ’message’message’ $message, on the other hand, is a named variable. They’re both variables, to be sure.

Question # 54) What is the difference between the PHP commands require and include?

Both the require and include functions do the same thing: they include and evaluate the specified file. The difference is that require will throw a fatal error if the specified file location is invalid or if any other error occurs, whereas include will issue a warning and continue the code execution.

3 Year Experience PHP Interview Questions and Answers

Question # 55) What are the various types of PHP errors?

In PHP, there are four different types of errors.

  1. Errors that should be reported
  2. Errors should be noted.
  3. Errors that are fatal
  4. Mistakes in parsing

PHP Error Constants and their Descriptions (Question # 56)

  1. E_ERROR: A fatal error that terminates the script.
  2. E_WARNING: This is a run-time warning that does not result in the script being terminated.
  3. E_PARSE: Parse error at compile time
  4. E_NOTICE: An error in the code has resulted in a run-time notice.
  5. E_CORE_ERROR: Fatal errors in PHP’s code.
  6. E_CORE_WARNING: Errors that occur during PHP’s execution.
  7. E_COMPILE_ERROR: Fatal compile-time errors indicate a scripting problem.
  8. E_USER_ERROR: Error message generated by the user.
  9. E_USER_WARNING: A warning message created by the user.
  10. E_USER_NOTICE: Message created by the user.
  11. E_STRICT: Notifications at runtime
  12. E_RECOVERABLE_ERROR: A fatal error that can be caught and recovered.
  13. E_ALL: Detects all warnings and errors.
  14. E_DEPRECATED E_DEPRECATED E_DEPRECATED
  15. E_USER_DEPRICED is a depricated user.

Question # 57) What is Include_once’s purpose in PHP?

During the execution of the script, the include_once statement includes and evaluates the specified file. The only difference between this and the include statement is that if code from a file has already been included, it will not be included again, and include_once returns TRUE.

Exception Handling in PHP (Question #58): What is it?

This is referred to as an exception. Answer # PHP 5 introduced a new object-oriented approach to error handling. If a specified error (exceptional) condition occurs, exception handling is used to change the normal flow of the code execution.

Question # 59) What is the purpose of the post method in PHP?

Question # 60) In PHP, what is the purpose of the post command?

When a user completes the form above and clicks the submit button, the data is sent to a PHP file named

Interview Questions And Answers For Senior PHP Developers

Question # 61) In PHP, what is the difference between require and require_once?

# require() includes and evaluates a specific file, whereas require_once() only does so if it hasn’t been included previously (on the same page). So, when you want to include a file with a lot of functions, for example, require_once() is recommended.

Question # 62) In PHP, what is the purpose of die?

The die() function exits the current script and prints a message. The exit() function is an alias for this function.

How do you debug PHP? (Question #63)

Place a breakpoint at each line where the debugger should pause. Open the IDE and navigate to the file containing the source code you want to debug. To start a debugging session, type: Place the cursor at the beginning of a line and press Ctrl-F8/-F8 or choose Debug > to set a breakpoint.

Question # 64) What does xdebug stand for?

Answer # Xdebug is a PHP extension that allows you to debug and profile your code. The DBGp debugging protocol is used.

What is Chrome logger (Question # 65)?

ChromePHP was the previous name for Chrome Logger. Answer # Chrome Logger is a Chrome extension that allows you to debug server-side applications directly in the Chrome console. Although most languages have their own logging capabilities, it is sometimes more convenient to view your logs directly in the browser.

Interview Questions And Answers For Experienced PHP Developers

What is the Phpstorm (Question # 66)?

JetBrains PhpStorm is a commercial, cross-platform PHP IDE based on JetBrains’ JetBrains’ JetBrains’ JetBrains’ JetBrains’ JetBrains

Question # 67) What is the purpose of Zend Studio?

Zend Studio is a Zend Technologies’ commercial, proprietary integrated development environment (IDE) for PHP, based on the PHP Development Tools (PDT) plugin for the Eclipse platform (the PDT project is led by Zend).

What is the difference between urlencode and urldecode in PHP?

urlencode(string) is the answer. This PHP function encodes a string for use in a URL’s query part. When a browser sends form data to a web server, it usually uses this method. When placing text in a query string, URL encoding is used to prevent it from being confused with the URL.

urldecode(string) – urldecode(string) – urldecode(

Question # 69) In PHP, what is LAMP?

LAMP (Linux, Apache, MySQL, and PHP) is an acronym for Linux, Apache, MySQL, and PHP.

Questions And Answers For PHP Interviews

Question # 70) In MySQL, what is the maximum database size?

Operating System &nbs

Win32 with FAT/FAT32   &nbsp

2TB (possibly larger) Win32 with NTFS

Linux 2.2-Intel 32-bit  &nbsp

4 Terabytes ext3 file system (Linux 2.4+)

Solaris 9/10

NetWare with the NSS file system

Questions about PHP programming

Question # 71) In MySQL, what is the maximum size of a table?

By default, MyISAM allows data and index files to grow up to 256TB, but this limit can be increased to a maximum of 65,536TB (2567 1 bytes).

You’re using a MyISAM table, and the table’s space requirements exceed the internal pointer size limit.

Question # 72) What is the MySQL database’s capacity?

The largest file size that the operating system you’re using can handle (between 4GB and 256TB depending on the O/S) is MySQL’s limit. # Database Storage Capacity is the answer. The innoDB table format allows you to span multiple files with a single table, allowing for tables in the database to be as large as 64 terabytes.

Question # 73) In a MySQL table, how many records can be stored?

With a table size limit of 64 terabytes and a MySQL row size limit of 65,535 rows, there can be 1,073,741,824 rows in InnoDB. If the row size is smaller, however, more records can be added. That’s the smallest number of records using the maximum row-size limit.

Question # 74) In MySQL, how many columns can be added to a table?

The precise limit is determined by a number of interconnected factors. Answer # MySQL 5.0 Column Count Limits: Each table has a hard limit of 4096 columns, but the effective maximum for a given table may be less. The maximum row size for any table (regardless of storage engine) is 65,535 bytes.

Questions And Answers For PHP Interviews

What is varchar mysql? (Question # 75)

VARCHAR columns contain variable-length strings as values. The length can range from 0 to 65,535 characters. The maximum row size (65,535 bytes, which is shared among all columns) and the character set used determine the effective maximum length of a VARCHAR.

Question #76: What is the size of varchar Max?

The storage capacity is equal to the length of the data entered plus two bytes. The string length is defined by # n, which can range from 1 to 8,000. Varchar is also known as charvarying or charactervarying in ISO. 231-1 bytes (2 GB) is the maximum storage size indicated by max.

Question # 77) Why do mysql triggers exist?

The trigger can be called before or after the event when you run one of the following MySQL statements on the table: INSERT, UPDATE, or DELETE. A MySQL trigger is a database object that is linked to a specific table. When a defined action for the table is performed, it will be activated.

Questions And Answers For PHP Interviews

Question #78: What is the size of Nvarchar Max?

Question #79) What is the purpose of the delimiter in MySQL?

Because mysql recognizes the semicolon as a statement delimiter by default, you’ll need to temporarily redefine the delimiter to get mysql to send the entire stored program definition to the server. Use the delimiter command to change the mysql delimiter.

Question # 80) In MySQL, what is a stored procedure?

A procedure has a name, a list of parameters, and one or more SQL statements. Answer # A procedure (also known as a stored procedure) is a database-stored subroutine similar to a subprogram in a regular programming language. Stored procedures are supported by almost all relational database systems, and MySQL 5 introduces them.

Questions for Technical Interviews in PHP

Question # 81) In MySQL, what does a delimiter do?

Delimiter isn’t just for triggers; it’s also useful for defining triggers and stored procedures, as you want them to contain semicolons ( The end of each command you send to the mysql command line client is marked by the # delimiter.

Question # 82) In MySQL, what is a definer?

A DEFINER attribute that names a MySQL account can be added to all stored programs (procedures, functions, triggers, and events) and views. The default account is the user who creates the object if the DEFINER attribute is omitted from a stored program or view definition.

When should you use a stored procedure? (Question #83)

They have the ability to reduce network traffic. They make it possible to program in modules. They enable quicker execution. The following are some of the advantages of using stored procedures in SQL Server instead of application code stored locally on client computers:

Question # 84) In mysql, what is the purpose of limit?

The LIMIT clause in MySQL is used to limit the number of records returned. The LIMIT clause makes it simple to use SQL to code multi-page results or pagination, and it’s especially useful on large tables. A large number of records returned can have an impact on performance. Limit Data Selections From a MySQL Database is the answer.

Question # 85) In MySQL, what is the purpose of a dual table?

The DUAL table is a one-row, one-column table that comes standard with Oracle and other database installations. The table in Oracle has a single VARCHAR2(1) column named DUMMY with a value of ‘.

Questions for Advanced PHP Interviews

Question # 86) In mysql, what is the purpose of an inner join?

The INNER JOIN clause in MySQL joins rows from one table to rows from other tables, allowing you to query rows that contain columns from both tables. The INNER JOIN clause is a part of the SELECT statement that is optional.

What is the difference between an inner and an outer join? Question # 87) What is the difference between an inner and an outer join?

All records from the first table, as well as any records in the second table that match the joined keys, will be selected by a left outer join. Answer # An inner join will only select records where both tables’ joined keys are present.

Question # 88) In mysql, what is the purpose of offset?

Both MySQL and PostgreSQL have a cool feature called OFFSET, which is typically used in conjunction with a LIMIT clause. A SQL statement’s LIMIT clause is used to limit the number of results returned.

Interview Questions And Answers For PHP Developers With 4 Years Of Experience

Question # 89) In PHP, what is stdClass?

stdClass is a generic PHP empty class that is used to create a new Object.

Question # 90) What are the PHP functions soundex() and metaphone()?

You can use soundex and metaphone to find strings that sound similar when spoken aloud.

The soundex() function determines a string’s soundex key. A soundex key is a four-character alphanumeric string that represents how a word is said in English.

A metaphone key represents how a string would sound if spoken in English. metaphone() calculates a string’s metaphone key with the metaphone() function.

Question # 91) In PHP, how do I parse a configuration file?

The parse_ini_file() function reads a configuration (ini) file and returns its contents.

Question # 92) In PHP, what is PSR?

The PHP Framework Interop Group has published the PHP Standard Recommendation (PSR), which is a PHP specification. It serves the same purpose as the Java Specification Request for Java in terms of standardizing programming concepts in PHP.

Questions And Answers For PHP Logical Interviews

Question # 93) In PHP, what is a trait?

In single inheritance languages like PHP, traits are a mechanism for code reuse. A trait is designed to alleviate some of the drawbacks of single inheritance by allowing a developer to freely reuse sets of methods across multiple independent classes in different class hierarchies.

94. What is the difference between php traits and interfaces?

The main difference is that with interfaces, you must define the actual implementation of each method within each class that implements said interface, whereas traits are just chunks of code injected into a class. This allows you to have many classes implement the same interface but with different behavior.

Question # 95) In PHP, how do I get a server’s IP address?

Is there an easy way to delete an element from a PHP array? Question # 96) Is there an easy way to delete an element from a PHP array?

Also, if you have the value but don’t know what to do with it, Answer # If we only want to delete one array element, we can use the unset() method or the array_splice() alternative.

Interview Questions And Answers For Experienced PHP Developers

Question # 97) Could you please explain when you should use If-else instead of switch statements?

If a single variable’s value needs to be changed, switching is always recommended. Otherwise, use a lot of if-else statements.

In PHP 5.3, there are two methods for defining constants: using the const keyword or using the nbsp

Const is faster than define() because it is a language construct that is defined at compile time. The primary distinction between the two approaches is that const defines constants at compile time, whereas define() does so at runtime.

5 Year Experience PHP Interview Questions and Answers

Question # 98) In PHP, what is self?

The self keyword in PHP allows you to access static properties and methods.

What is $this? (Question # 99)

It’s the same as many other object-oriented languages’ way of referencing a class instance from within itself.

When should you use self instead of $this?

To refer to the current object, use $this. To refer to the current class, use self.

What is the difference between Apache and Tomcat (Question # 100)?

Apache as a response So you can create your WAR (Web ARchive) file in your Java project and simply drop it into Tomcat’s deploy directory. Tomcat is a Java server that supports servlets and JSP pages. So, Apache is a HTTP server that serves HTTP. Your Java Servlets and JSPs are deployed using Tomcat.

Question # 101: What is Nginx and how does it work?

Nginx is a reverse proxy server that supports HTTP, HTTPS, SMTP, IMAP, and POP3 protocols, as well as server load balancing and HTTP Cache. NGINX (pronounced Engine-X) is a lightweight, high-performance web server or proxy server that is open source.

Which is the best Web server? (Question # 102)

Various web servers are available for various technologies.

Linux, Apache, MySQL, and PHP (LAMP) are acronyms for Linux, Apache, MySQL, and PHP.

WIMP stands for Windows, Internet Information Services, MySQL/MS SQL Server, and PHP.

Windows, Apache, MySQL/MS SQL Server, and PHP (WAMP) are acronyms for Windows, Apache, MySQL/MS SQL Server, and PHP.

Linux, NGINX, MySQL, and PHP (LEMP) are acronyms for Linux, NGINX, MySQL, and PHP.

Questions And Answers For Experienced PHP Interviewees

What is the difference between Apache and NIGINX (Question # 103)?

Many modules have been written to expand the functionality of the open-source Apache web server, which has been available for many years and has a large user base. Since 1995, Apache web servers have been in use. More websites are powered by Apache than by any other product. The Apache HTTP server and NGINX are the world’s two most popular open source web servers today.

However, under heavy load, Apache slows down due to the need to spawn new processes, which consumes more computer memory. When traffic reaches the administrator-configured limit of processes, Apache will also refuse new connections. It also creates new threads that must compete for memory and CPU resources.

Although the software is open source and free, Nginx provides support if you purchase its Nginx Plus version. Nginx is an event-driven server. Nginx is an open source web server that was created to address some of Apache’s performance and scalability issues. Processes and threads are used by Apache. Their architecture is described as “event-driven and asynchronous.”

Question # 104) In PHP, what is.htaccess?

.htaccess is a configuration file for web servers that run the Apache Web Server software. When a.htaccess file is placed in a directory that is then

What are the advantages of using.htaccess?

There are numerous advantages to using the.htaccess file in PHP:

  • redirection of URLs
  • Taking care of error pages
  • Password Security
  • Visitors can block facilities based on their IP address.
  • Changing the Config and Environment variables

Question #105) In PHP, what is a composer?

Composer is a PHP programming language application-level package manager that provides a standard format for managing PHP software and required libraries dependencies.

What is PHP artisan (Question #106)?

The command-line interface included with Laravel is called Artisan. It comes with a number of useful commands that you can use while developing your app. The Symfony Console component is at the heart of it.

Question # 107) What is the result of the PHP code below?

$i = 012 $i = 012 $i = 012 $i = 012 $i =

$i / 2 echo

Explanation: You may believe that the output of the above code is 6. You are correct. That is correct.

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What is SQL injection? (Question # 108)

When a user provides SQL code as user input for a Web page, the SQL code is then executed in the database, which is known as SQL injection (or SQL injection attack).

Why does SQL injection happen? (Question # 109)

Injections are used by hackers to gain unauthorized access to the underlying data, structure, and database management system. It’s one of the most common flaws in web applications. SQL injection is a type of attack that takes advantage of a security flaw in an application’s database layer.

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Question # 110) What is the purpose of Mysql_real_escape_string?

In the case of MySQL, this entails the following: MySQL’s real_escape_string() method is called by mysql_real_escape_string().

Question 111) In PHP, what is input sanitization?

Many of the functions needed for checking user input are included in the PHP filter extension, which is designed to make data validation easier and faster. External input is validated and sanitized using PHP filters. # of responses

Question # 112) In PHP, what is the purpose of Stripslashes?

This function is useful for cleaning up data retrieved from a database or an HTML form. Backslashes added by the addslashes() function are removed by the stripslashes() function. # Definition and Application

What is the purpose of Htmlspecialchars in PHP? Question # 113)

The function htmlspecialchars($string) is used in many PHP legacy products to convert characters like <.

Question #114: In PHP, what is the purpose of Addslashes?

These are single quote characters (‘). string addslashes ( string $str ) Returns a string with backslashes in front of characters that must be escaped.

Question #115: In PHP, what is XSS?

In web applications, XSS vulnerabilities are very common. # Cross-Site Scripting (abbreviated as XSS) is a type of security flaw in which an attacker successfully exploits a website to deliver a potentially malicious JavaScript payload to a user.

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What is the mysql injection (question #116)?

MySQL injection is the act of a third party inserting a MySQL statement into your database without your knowledge. Injection happens when you ask a user for information, such as their name, and they instead give you a MySQL statement that you unwittingly run on your database.

Question #117: What does die mean in PHP?

The exit() function is an alias for this function. # of responses The die() function exits the current script by printing a message.

Question # 118) In PHP, what does explode do?

You can also use the PHP implode and explode functions to convert between strings and arrays: implode implodes an array into a string, and explode explodes a string into an array. # of responses

What are the delimiters in PHP? (Question #119)

Any non-alphanumeric, non-backslash, non-whitespace character can be used as a delimiter. When using the PCRE functions, delimiters must be used to surround the pattern. # of responses Forward slashes (/), hash signs (#), and tildes () are commonly used delimiters.

Question # 120) What is the purpose of Print_r in PHP?

The print_r() function is used to print the array in a human-readable format.

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What is Var_dump (Question #121)?

The var_dump function returns structured information about variables and expressions, such as their type and value. # of responses

What are the new features in PHP 7? Question # 122) What are the new features in PHP 7?

PHP 7 introduces the following new features:

  • Declarations of scalar types –
  • Declarations of type returns
  • Operator for null coalescing
  • Captain of a spaceship
  • define() creates constant arrays.
  • Classes with no names
  • Escape syntax for Unicode codepoints
  • Closure::call() is a function that is used to call a closure.

Question #123: In PHP, how do you define a constant?

A constant is a name that identifies a single value. A valid constant name begins with a letter or underscore (no $ sign before the constant name) and ends with a letter or underscore. During the script, the value cannot be changed. # of responses

What is the meaning of –WARNING–

You can output in the script if output buffering is enabled, but PHP does not. When you output something in PHP (do an echo or print), the HTTP headers must be sent at the same time. # of responses

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Question #124) What is the difference between getters and setters in PHP?

You can use a “getter” to retrieve or “get” a given property. These functions are sometimes referred to as “mutator methods.” # “Getters” and “Setters” are object methods that control access to specific class variables / properties. You can use a “setter” to “set” the value of a property.

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