Top 15 Question- Answer of PHP Language?
What is PHP?
Answer: PHP is a server-side scripting language used for web development.
What is the current stable version of PHP?
Answer: The current stable version of PHP is PHP 8.0.
What is the difference between echo and print?
Answer: Echo can take multiple parameters and does not return a value, while print can only take one parameter and returns a value of 1.
What is the difference between include and require?
Answer: Include will include a file and continue executing the script even if the file is not found, while require will halt the script and produce a fatal error if the file is not found.
What is the difference between GET and POST methods in PHP?
Answer: GET passes data in the URL, while POST passes data in the request body.
What is the use of the isset() function in PHP?
Answer: The isset() function is used to check if a variable has been set and is not null.
What is the use of the empty() function in PHP?
Answer: The empty() function is used to check if a variable is empty or not.
What is a session in PHP?
Answer: A session in PHP is a way to store data on the server between multiple requests from a user.
What is a cookie in PHP?
Answer: A cookie in PHP is a way to store data on the client-side browser.
What is a PDO in PHP?
Answer: PDO (PHP Data Objects) is a database access layer that provides a consistent interface for accessing databases in PHP.
What is a namespace in PHP?
Answer: A namespace in PHP is used to group related code together and avoid naming collisions.
What is a trait in PHP?
Answer: A trait in PHP is a way to reuse code across multiple classes.
What is an interface in PHP?
Answer: An interface in PHP defines a set of methods that a class must implement.
What is the use of the static keyword in PHP?
Answer: The static keyword in PHP is used to create variables or methods that belong to a class rather than an instance of the class.
What is the difference between abstract classes and interfaces in PHP?
Answer: An abstract class can have concrete methods, while an interface cannot. Additionally, a class can implement multiple interfaces, but can only inherit from one abstract class.
In conclusion, these are some of the top questions and answers related to PHP. Having a solid understanding of these concepts will help developers create robust and efficient PHP applications.
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