23+ PHP Interview Questions For Developers

The unlink() function is dedicated for file system handling. Mysqli_affected_rows() return the number of entries affected by an SQL query. If you wish to explore your PHP skills, try iMocha’s software engineer skills assessment and explore skills.

PHP developer interview questions

This section will explore a progressive series of PHP coding challenges that span intermediate to advanced proficiency. 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. This wide range of applications explains why PHP skills are sought after for various technical roles.

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Discover the essential expertise and qualifications to consider when hiring job-fit PHP developer. The strip_tags() function enables us to clean a string from the HTML tags. The unlink() function is dedicated to file system handling. It is possible to use the dedicated function, is_numeric() to check whether it is a number or not. The functions are getimagesize() for size, imagesx() for width and imagesy() for height. PHP only supports single inheritance, which means that a class can be extended by using the term ‘extended’ from only one other class.

The interviewer may also ask about any experience you have with databases, such as MySQL or Oracle. It is possible to generate HTML through PHP scripts, and it is possible to pass pieces of information from HTML to PHP. Dependency Injection (DI) is a design pattern and a programming technique used in software development to achieve loose coupling between components or classes. In DI, the dependencies of a class are not created within the class itself but are provided from the outside, typically through the class constructor or setter methods.

Q36. What is the main difference between asp net and PHP?

Passing the variable by reference means that the address of the variable where the value is stored is passed to the called function. Any changes made to the function do affect the source variable. Passing the variable by value means that the value of the variable is directly passed to the called function. Any changes made to the function doesn’t affect the source variable.

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. A significant component of the technical interview is the coding challenge.

advanced PHP interview questions and the answers to listen for

The function first calculates the total sum of what the numbers would be if none were missing. The difference between these two sums is the missing number. This question tests the candidate’s ability to use built-in PHP functions for array manipulation and mathematical computations. One of the first things to note is that PHP interviews often involve several layers.

It’s best to carry out interviews and ask candidates PHP interview questions after you’ve received the results of their skills assessments. Use the 39 advanced PHP interview questions below to learn more about your senior developers’ skills. Here are a selection of the basic PHP interview questions above and the answers you’ll want to look out for from your candidates. To make things easier, we’ve put together this list of 100 PHP interview questions you can ask candidates to make sure you hire great developers. PHP session_start() function is used to start the session. It returns the current session if the session is created already.

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Usually, employers look for PHP developers with a familiarity with the object-oriented programming paradigm. A PHP developer must also be well-versed in MVC-based PHP frameworks. PHP code is executed (interpreted, specifically) on the server. The final keyword in a method declaration indicates that the method cannot be overridden by subclasses.

  • This means that PHP will take care of the runtime errors of the lines using the symbol “@” at the beginning.
  • Over 3,000 companies and 40% of developers worldwide use HackerRank to hire tech talent and sharpen their skills.
  • HTML is a client-side language, while PHP is a server-side language.
  • The isset() function checks if the variable is defined and not null.
  • The strlen() function is used to get the length of the string.

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. In this blog, we have curated the top 100 PHP questions and answers to help both developers and hiring managers grasp the underlying concepts better. For hiring managers, this blog will aid you in assessing candidates effectively, ensuring that you select the most competent and skilled individuals for your organization. In this task, the PHP session_start function is first called to start a new session or to resume the current one. This is necessary before any session variables can be set.

$_FILES is an associative array of things delivered over the HTTP POST method to the current script. __sleep returns the array of all the variables that need to be saved, while __wakeup retrieves them. Imagetypes() returns the supported image formats and types in the current version of GD-PHP.

PHP developer interview questions

It is possible to pass as many parameters as you’d like inside a function. Specified inside the parentheses after the function name, these all parameters act as variables inside the PHP parameterized function. https://wizardsdev.com/en/vacancy/middle-php-developer/ For example, if a string value is assigned to a $var variable, then it automatically gets converted to a string. Likewise, if an integer value is assigned to $var, then it becomes an integer.

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