Home » PHP Quiz » Page 6

You are working on a project where certain methods in your classes should only be defined but not implemented, and the actual implementation should be provided by the derived classes. Which PHP concept helps achieve this?

  • Interface
  • Trait
  • Abstract Class
  • Final Class
An interface defines method signatures without implementations. Derived classes that implement the interface must provide the implementation for those methods. This is a common approach in PHP to achieve this requirement.
Discuss it

To check the data type of a variable in PHP, which function is used?

  • is_type()
  • gettype()
  • datatype()
  • typeof()
To check the data type of a variable in PHP, you use the gettype() function. This function returns a string indicating the data type of the variable, such as "integer," "string," or "array."
Discuss it

You are developing a RESTful API in PHP and want to ensure that the response is always in JSON format. Which PHP function would you primarily use to convert the data to this format?

  • json_encode()
  • json_decode()
  • serialize()
  • unserialize()
The json_encode() function in PHP is used to convert data to JSON format. It's essential for generating JSON responses in a RESTful API.
Discuss it

In PHP, the ________ function can be used to return a part of a string.

  • substr()
  • split()
  • slice()
  • cut()
The 'substr()' function in PHP is used to extract a portion of a string. It takes the original string and specifies the start and length of the substring to be returned.
Discuss it

A developer wants to store multiple values in a single variable. Which of the following data types in PHP should he/she use?

  • Array
  • String
  • Integer
  • Object
To store multiple values in a single variable, an array should be used in PHP. Arrays can hold various data types and are versatile for handling collections of data.
Discuss it

When dealing with form data in PHP, which function can be used to check if a particular input filter is supported?

  • filter_has_var()
  • validate_input()
  • check_input_filter()
  • is_filter_supported()
The filter_has_var() function is used to check if a particular input filter is supported for a specific form input. This is essential for input validation in PHP.
Discuss it

In the context of PHP, what does the acronym "DRY" stand for?

  • Don't Repeat Yourself (DRY)
  • Data Retrieval Yield
  • Document Representation Yields
  • Development Reuse Yield
In PHP, "DRY" stands for "Don't Repeat Yourself," a programming principle that emphasizes reusing code to avoid redundancy and improve maintainability.
Discuss it

To check if a specific cookie is set in PHP, you can use the ________ superglobal array.

  • $_GET
  • $_SESSION
  • $_COOKIE
  • $_POST
The correct option is $_COOKIE. In PHP, $_COOKIE is a superglobal array used to access cookies set in the client's browser.
Discuss it

To replace all occurrences of a search string with a replacement string in PHP, you would use the ________ function.

  • str_replace()
  • replace_string()
  • find_replace()
  • substitute_string()
The str_replace() function is used in PHP to replace all occurrences of a search string with a replacement string within a given string.
Discuss it

Which keyword is used to create a class in PHP?

  • class
  • define
  • new class
  • make class
The 'class' keyword is used to define and create a class in PHP. Classes are the blueprint for objects in object-oriented programming.
Discuss it