PHP Quiz (Set 12) - Upskilling Engineers

PHP (Set 2)

1 / 10

What is the '$_SESSION' superglobal used for in PHP?

To store form data

To store information that is visible to the user

To store user-specific data across multiple pages

To store global configuration settings

2 / 10

What is the purpose of the 'header()' function in PHP?

To display a message on the webpage

To include an external PHP file

To send HTTP headers to the browser

To set the character encoding of the webpage

3 / 10

What is the correct way to connect to a MySQL database using 'mysqli' in PHP?

$conn = mysqli_connect('localhost', 'username', 'password', 'database');

$conn = mysql_connect('localhost', 'username', 'password', 'database');

$conn = connect('localhost', 'username', 'password', 'database');

$conn = new mysqli('localhost', 'username', 'password', 'database');

4 / 10

What is the 'mysqli' extension used for in PHP?

To manipulate XML data

To perform image processing

To work with MySQL databases

To create user interfaces

5 / 10

What is the purpose of the 'implode()' function in PHP?

To combine two or more strings

To replace occurrences of a substring with another substring

To split a string into an array of substrings based on a delimiter

To join elements of an array into a string using a specified delimiter

6 / 10

What is the purpose of the 'explode()' function in PHP?

To split a string into an array of substrings based on a delimiter

To combine two or more strings

To find the position of a substring within a string

To replace occurrences of a substring with another substring

7 / 10

What does the 'array_push()' function do in PHP?

Adds an element to the beginning of an array

Removes the last element from an array

Adds one or more elements to the end of an array

Reverses the order of elements in an array

8 / 10

Which PHP function is used to return the length of an array?

array_size()

count()

length()

size()

9 / 10

What is the correct way to comment a single line in PHP?

# This is a comment

// This is a comment

/* This is a comment */

# This is a comment //

10 / 10

What is the purpose of the 'isset()' function in PHP?

To determine if a variable is set and not NULL

To convert a variable to a string

To check if a variable is empty

To unset a variable

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