Compact and extract functions in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an array from variables using the compact function.

PHP

<?php
$name = "Alice";
$age = 25;
$data = [1]("name", "age");
print_r($data);
?>

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

Aextract

Bcompact

Carray

Dimplode

Attempts:

3 left

💡 Hint

Common Mistakes

Using extract instead of compact.

Trying to use array() with variable names as strings.

The compact function creates an array from variables given their names as strings.

2fill in blank

medium

Complete the code to extract variables from the array using the extract function.

PHP

<?php
$data = ['city' => 'Paris', 'country' => 'France'];
[1]($data);
echo $city . ', ' . $country;
?>

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

Aimplode

Bcompact

Carray_merge

Dextract

Attempts:

3 left

💡 Hint

Common Mistakes

Using compact instead of extract.

Trying to echo array elements without extracting.

The extract function imports variables from an array into the current symbol table.

3fill in blank

hard

Fix the error in the code by choosing the correct function to create an array from variables.

PHP

<?php
$fruit = "apple";
$color = "red";
$info = [1]("fruit", "color");
print_r($info);
?>

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

Acompact

Bimplode

Carray_push

Dextract

Attempts:

3 left

💡 Hint

Common Mistakes

Using extract instead of compact.

Using implode which joins array elements into a string.

The compact function correctly creates an array from variable names. Using extract here would cause an error.

4fill in blank

hard

Fill both blanks to create an array from variables and then extract them back.

PHP

<?php
$animal = "dog";
$legs = 4;
$data = [1]("animal", "legs");
[2]($data);
echo $animal . ' has ' . $legs . ' legs.';
?>

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

Acompact

Bimplode

Cextract

Darray_merge

Attempts:

3 left

💡 Hint

Common Mistakes

Using implode instead of compact.

Using array_merge instead of extract.

First, compact creates an array from variables. Then, extract imports variables from that array.

5fill in blank

hard

Fill both blanks to create an array from variables, extract them, and print a sentence.

PHP

<?php
$brand = "Toyota";
$model = "Corolla";
$year = 2020;
$data = [1]("brand", "model", "year");
[2]($data);
echo "Car: " . $brand . " " . $model . " (" . $year . ")";
?>

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

Aextract

Bcompact

Cprint_r

Dimplode

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up compact and extract order.

Using implode which joins array elements into a string.

Use compact to create the array, extract to import variables from that array.