Q
What is the purpose of the mysqli_close() function in PHP?

Answer & Solution

Answer: Option D
Solution:
The mysqli_close() function in PHP is used to close a previously opened database connection. It releases the resources associated with the connection and frees up memory, helping improve the performance of the PHP application.
Related Questions on Average

What is the primary function of the mysqli_fetch_array() function in PHP?

A). Establishing a database connection

B). Executing SQL queries

C). Fetching data from the database

D). Closing the database connection

Which of the following SQL operations is used to update existing data in a database table?

A). INSERT

B). SELECT

C). UPDATE

D). DELETE

Which of the following SQL operations is used to remove all data from a database table?

A). INSERT

B). SELECT

C). TRUNCATE

D). DELETE

What is the primary advantage of using PDO extension over MySQLi for executing SQL queries in PHP?

A). Better performance

B). Improved security against SQL injection

C). Easier syntax

D). Compatibility with older PHP versions

What is the primary purpose of the PDO::query() method in PHP PDO extension?

A). Establishing a database connection

B). Executing an SQL query

C). Fetching data from the database

D). Closing the database connection

Which of the following statements is true regarding SQL SELECT operation?

A). It updates existing records in a table

B). It removes specific records from a table

C). It adds new records to a table

D). It retrieves data from a table

What is the purpose of the mysqli_num_rows() function in PHP?

A). Establishing a database connection

B). Executing SQL queries

C). Fetching data from the database

D). Getting the number of rows in a result set

Which of the following PHP functions is used to execute an SQL query in PDO extension?

A). pdo_execute()

B). pdo_query()

C). pdo_fetch()

D). pdo_prepare()

Which PHP extension is commonly used for executing SQL queries and interacting with databases?

A). MySQL

B). PDO

C). SQLI

D). PHPDB

Which of the following PHP functions is used to get the number of rows affected by an SQL query in MySQLi extension?

A). mysqli_num_rows()

B). mysqli_affected_rows()

C). mysqli_num_fields()

D). mysqli_fetch_row()