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

What will be the output of the following PHP code?
<?php
$matrix = array(
array(1, 2, 3),
array(4, 5, 6),
array(7, 8, 9)
);
echo $matrix[1][2];
?

A). 1

B). 2

C). 4

D). 6

What is the output of the following PHP code?
<?php
$colors = array('Red', 'Green', 'Blue');
echo $colors[1];
?

A). Red

B). Green

C). Blue

D). 1

What will be the output of the following PHP code?
<?php
$info = array('name' => 'John', 'age' => 30, 'city' => 'New York');
echo array_key_exists('age', $info) ? 'Yes' : 'No';
?

A). Yes

B). No

C). John

D). 30

What will be the output of the following PHP code?
<?php
$colors = array('Red' => 1, 'Green' => 2, 'Blue' => 3);
asort($colors);
foreach ($colors as $color => $value) {
echo '$color: $value ';
}
?

A). Red: 1 Green: 2 Blue: 3

B). 1: Red 2: Green 3: Blue

C). 1: Blue 2: Green 3: Red

D). Red: 3 Green: 2 Blue: 1

What will be the output of the following PHP code?
<?php
$info = array('name' => 'Alice', 'age' => 25);
echo count($info);
?

A). 1

B). 2

C). 25

D). Alice

Which PHP function is used to extract a slice of an array?

A). splice()

B). slice()

C). extract()

D). split()

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

A). To remove elements from an array

B). To add elements to the beginning of an array

C). To add elements to the end of an array

D). To reverse the order of elements in an array

What will be the output of the following PHP code?
<?php
$numbers = array(10, 20, 30, 40, 50);
array_pop($numbers);
foreach ($numbers as $number) {
echo $number . ' ';
}
?

A). 20 30 40 50

B). 10 20 30 40

C). 10 20 30 40

D). 10 20 30 40 50

What will be the output of the following PHP code?
<?php
$person = array('name' => 'John', 'age' => 30, 'city' => 'New York');
echo $person['age'];
?

A). name: John

B). age: 30

C). city: New York

D). John

What is the correct syntax for creating a multidimensional array in PHP?

A). $array = array(array(1, 2, 3), array(4, 5, 6), array(7, 8, 9));

B). $array = array([1, 2, 3], [4, 5, 6], [7, 8, 9]);

C). $array = array{1, 2, 3}, {4, 5, 6}, {7, 8, 9};

D). $array = array{{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};