Which function is used to destroy a specific session variable in PHP? O remove)

Question

Which function is used to destroy a specific session variable in PHP? O remove) unset() o delete) O recycle) QUESTION 17 2 points Save Answer Which of the following is not a valid comparison operator in PHP? I- QUESTION 18 2 points Save Answer Which of the following is the correct way to define a variable in PHP? O $10my-variable= 10; Smy-variable= 10 O $my variable: 10; variable = 10; QUESTION 19 2 points Save Answer Which of the following syntax is correct for open a database connection? connect(host,username,password,dbname); o connect_mysqlihost,username,password,dbname); O mysqli_connect(host,username,password,dbname)

Explanation / Answer

Question 16 : which function is used to destroy a specific session variable in PHP?

ANSWER : unset()

unset() is destroys the specified variables.

syntax:

unset(var1, var2..)

Question 17 : which of the following is not a valid comparison operator in PHP?

ANSWER : &&&

Few of Comparison operators in PHP :

== Equals

=== Equals to same variable type

<> Not equals

!= Not equals

!== Not equals to same variable typ

< Less than

<= Less than or equal to

> Greater than

>= Greater than or equal to

Question 18 : which of the following is the correct way to define a variable in PHP?
ANSWER : $my_variable = 10;

Rules:

Question 19 : which of the following syntax is correct for open a database connection?
ANSWER : mysqli_connect(host,username,password,dbname);

To Open a new connection to the MySQL server:

syntax:

<?php
$con = mysqli_connect("localhost","username","password","database");

?>

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