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21 Essential PHP Interview Questions and Answers

PHP provides a range of built-in functions and also allows users to create their own custom functions. It provides a data-access abstraction layer that is lightweight and vendor-neutral. As a result, the function to issue queries and fetch data will be the same regardless of which database we utilize. It also concentrates on data access abstraction rather than database abstraction.

PHP developer interview questions

The complexity and depth of PHP interview questions can range widely, depending on the specific role and level of expertise required. This section will explore a progressive series of PHP coding challenges that span intermediate to advanced proficiency. These questions will serve as a https://wizardsdev.com/en/vacancy/middle-php-developer/ vital resource for developers seeking to sharpen their skills or for hiring teams aiming to evaluate candidate competencies effectively. Although PHP is a flexible programming language, it still has limitations. Firstly, security can be a problem because it is an open-source language.

What is the default session time in PHP?

As a result, every time a user visits the site, the contents get regenerated. Therefore, PHP developers are software developers who specialize in server-side development using PHP. Due to the many uses of PHP, developers are sometimes referred to as software developers or web developers. They can work either developing user interfaces or the backend part of websites.

Destructors prove valuable in releasing resources, closing database connections, and performing any essential cleanup tasks. Yes, it is possible to have an infinite execution time in PHP for a script by adding the set_time_limit(0) function to the beginning of a script. You should be prepared to explain the methods you use to stay organized and productive when coding. You can also talk about how you prioritize tasks based on importance and urgency. Additionally, you can mention any tools or software that you use to help you manage your workload.

PHP Interview Questions for 10 Years Experience

The three basic classes of errors are notices (non-critical), warnings (serious errors) and fatal errors (critical errors). However, foreach provides an easy way to iterate over arrays, and it is only used with arrays and objects. $_FILES[‘userfile’][‘tmp_name’] represents the temporary filename of the file stored on the server. __sleep returns the array of all the variables that need to be saved, while __wakeup retrieves them. The mysqli_fetch_object() function collects the first single matching record where mysqli_fetch_array() collects all matching records from the table in an array. The result set can be handled using mysqli_fetch_array, mysqli_fetch_assoc, mysqli_fetch_object or mysqli_fetch_row.

PHP developer interview questions

This is used further to store data into a variable, and then you can use it when required without the requirement of defining it again. PHP supports file operations by providing users with a plethora of file-related functions. In PHP, the session_start() function is used to start a new session.

How can you compare objects in PHP?

It is automatically called when an object is cloned using the clone keyword. In PHP, a generator is a special type of function that allows you to iterate over a set of values without needing to generate and store all the values in memory at once. It uses the yield keyword to produce a sequence of values on each iteration. The self keyword is commonly used for accessing static members and invoking static methods. You can write the code to be executed inside the function body.

PHP developer interview questions

A PHP parser is a piece of software that translates source code into computer-readable code. The parser converts whatever set of instructions we provide in the form of PHP code into a machine-readable format. The token gets all() functions in PHP that can be used to parse PHP code.

What is the use of count() function in PHP?

We will now look into some of the advanced PHP interview questions and answers. Let us now begin with the basic PHP interview questions and answers. Interestingly, it’s one of the most widely-used server-side languages and has been so for the past 25 years.

  • These questions will serve as a vital resource for developers seeking to sharpen their skills or for hiring teams aiming to evaluate candidate competencies effectively.
  • A callback is a PHP function used to execute other parts, and it is often used to add custom functionality to the code or to provide an alternative way to execute code.
  • In PHP, the __toString() method is a magic method that is automatically called when an object is treated as a string.
  • It means to call this function you must have to pass an email object otherwise an error is generated.
  • The complexity and depth of PHP interview questions can range widely, depending on the specific role and level of expertise required.
  • The string function strstr(string allString, string occ) returns part of allString from the first occurrence of occ to the end of allString.

With this, we have come to the end of PHP interview questions blog. I Hope these PHP Interview Questions will help you in your interviews. In case you have attended any PHP interview in the recent past, do paste those interview questions in the comments section and we’ll answer them. You can also comment below if you have any questions in your mind, which you might face in your PHP interview. These were some of the most commonly asked basic level PHP interview questions.

For the define() function, the optional case_insensitive parameter is a boolean value that determines whether the constant name should be treated as case-insensitive. If set to true, the constant name can be used in any case (upper, lower, or mixed). If omitted or set to false, the constant name is case-sensitive, and its usage must match the case defined during its declaration. An exception that occurs at compile time is called a checked exception.

PHP developer interview questions

If a file is critical to the script, then require should be used. These .htaccess files are used to change the functionality and features of the Apache web server. Both $message and $$message are variables in PHP and the difference lies in the name. While $message is a variable with a fixed name, $$message is a variable with a name that is actually stored in $message. Constants can be defined easily in PHP by making use of the define() function.

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