Array key and value extraction in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get all the keys from the array.

PHP

<?php
$fruits = ['a' => 'Apple', 'b' => 'Banana', 'c' => 'Cherry'];
$keys = array_[1]($fruits);
print_r($keys);
?>

Drag options to blanks, or click blank then click option'

Avalues

Bflip

Ckeys

Dmerge

Attempts:

3 left

💡 Hint

Common Mistakes

Using array_values instead of array_keys.

Trying to use array_flip which swaps keys and values.

The array_keys function returns all the keys from an array.

2fill in blank

medium

Complete the code to get all the values from the array.

PHP

<?php
$colors = ['red' => '#FF0000', 'green' => '#00FF00', 'blue' => '#0000FF'];
$values = array_[1]($colors);
print_r($values);
?>

Drag options to blanks, or click blank then click option'

Avalues

Bflip

Ckeys

Dpop

Attempts:

3 left

💡 Hint

Common Mistakes

Using array_keys instead of array_values.

Using array_pop which removes the last element.

The array_values function returns all the values from an array.

3fill in blank

hard

Fix the error in the code to swap keys and values of the array.

PHP

<?php
$items = ['pen' => 'blue', 'book' => 'red', 'bag' => 'black'];
$flipped = array_[1]($items);
print_r($flipped);
?>

Drag options to blanks, or click blank then click option'

Aflip

Breverse

Ckeys

Dvalues

Attempts:

3 left

💡 Hint

Common Mistakes

Using array_keys or array_values which do not swap keys and values.

Using array_reverse which reverses the order but does not swap keys and values.

The array_flip function swaps the keys and values of an array.

4fill in blank

hard

Fill both blanks to create an array of keys and values from the original array.

PHP

<?php
$person = ['name' => 'Alice', 'age' => 30, 'city' => 'Paris'];
$keys = array_[1]($person);
$values = array_[2]($person);
print_r($keys);
print_r($values);
?>

Drag options to blanks, or click blank then click option'

Akeys

Bvalues

Cflip

Dpop

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up keys and values functions.

Using array_flip which swaps keys and values instead of extracting them.

Use array_keys to get keys and array_values to get values.

5fill in blank

hard

Fill all three blanks to create a flipped array and then get its keys and values.

PHP

<?php
$colors = ['red' => '#FF0000', 'green' => '#00FF00', 'blue' => '#0000FF'];
$flipped = array_[1]($colors);
$flipped_keys = array_[2]($flipped);
$flipped_values = array_[3]($flipped);
print_r($flipped_keys);
print_r($flipped_values);
?>

Drag options to blanks, or click blank then click option'

Aflip

Bvalues

Ckeys

Dpop

Attempts:

3 left

💡 Hint

Common Mistakes

Using array_pop which removes elements instead of extracting keys or values.

Mixing up keys and values order.

First flip the array, then get keys and values from the flipped array.