PHP Arrays

PHP Arrays - Important Points

6.		Which of the following is not a valid way to loop through an array in PHP?

A. foreach()

B. for()

C. while()

D. do-while()

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Answer: option d

Explanation:

The do-while loop is not commonly used to loop through an array in PHP.

7.		What is the output of the following PHP code snippet? <?php $array = ["apple", "banana", "orange"]; echo count($array); ?>

What is the output of the following PHP code snippet?

<?php
$array = ["apple", "banana", "orange"];
echo count($array);
?>

A. 0

B. 1

C. 2

D. 3

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Answer: option d

Explanation:

The count() function returns the number of elements in an array, which in this case is 3.

8.		What is the output of the following PHP code snippet? <?php $array = ["apple", "banana", "orange"]; echo $array[1]; ?>

What is the output of the following PHP code snippet?

<?php
$array = ["apple", "banana", "orange"];
echo $array[1];
?>

A. apple

B. banana

C. orange

D. None of the above

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Answer: option b

Explanation:

The index 1 refers to the second element of the array, which is "banana".

9.		Which function is used to check if a value exists in an array in PHP?

A. in_array()

B. array_exists()

C. value_in_array()

D. array_contains()

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Answer: option a

Explanation:

The in_array() function is used to check if a value exists in an array in PHP.

10.		What is the output of the following PHP code snippet? <?php $array = ["apple", "banana", "orange"]; $reversed_array = array_reverse($array); print_r($reversed_array); ?>

10.

What is the output of the following PHP code snippet?

<?php
$array = ["apple", "banana", "orange"];
$reversed_array = array_reverse($array);
print_r($reversed_array);
?>

A. ["orange", "banana", "apple"]

B. ["apple", "banana", "orange"]

C. ["orange", "apple", "banana"]

D. None of the above

View Answer Discuss Work Space

Answer: option a

Explanation:

The array_reverse() function reverses the order of elements in an array, in this case resulting in ["orange", "banana", "apple"].

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PHP Arrays

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