PHP & Ajax

What is the purpose of the namespace keyword in PHP ?

• • To define a new class

• • To declare a constant

• • To avoid naming conflicts between classes, functions, and variables

• • To include external files

Which function is used to check if a file exists in PHP ?

• file_exists

• is_file

• check_file

• validate_file

How do you define a constant in PHP ?

• define_constant

• const

• constant_define

• create_constant

Which method is commonly used to send data in an AJAX request ?

• GET

• POST

• PUT

• DATA

How does AJAX enable asynchronous communication with the server ?

• By using synchronous requests

• By refreshing the entire page

• By disabling client-side scripting

• By using asynchronous requests

What does the $_GET superglobal variable in PHP do ?

• Retrieves data sent in the request body

• Retrieves data sent in the URL

• Sends data to another server

• Stores session data

What does the include function do in PHP ?

• Initiates a loop

• Declares a constant

• Prints text to the screen

• Includes an external file in the script

What is the purpose of the __autoload function in PHP ?

• Converts variables to strings

• Automatically loads classes

• Executes a callback function

• Adjusts the timezone settings

What is the difference between === and == in PHP ?

• === is used for assignment; == is used for strict equality

• === is a strict comparison; == is a loose comparison

• === is a bitwise operator; == is a logical operator

• === and == are interchangeable

How can you prevent SQL Injection in PHP when working with databases ?

• Using dynamic SQL queries

• Sanitizing user input with mysql_escape_string

• Utilizing prepared statements and parameterized queries

• Implementing client-side validation only