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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."
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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.
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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.
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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.
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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.
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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.
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When using PDO, which method fetches the next row from a result set?

  • fetch()
  • fetchNext()
  • fetchRow()
  • getNextRow()
The fetch() method in PDO is used to fetch the next row from a result set. It allows you to retrieve data from the result set one row at a time, facilitating efficient handling of large datasets.
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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.
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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.
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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.
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