Generator return values in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to yield values from the generator.

PHP

<?php
function gen() {
    yield 1;
    yield [1];
}

foreach (gen() as $value) {
    echo $value . " ";
}
?>

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

A2

B3

C4

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a value that is not a number.

Forgetting to yield the second value.

The generator yields 1 first, then yields 2 as the next value.

2fill in blank

medium

Complete the code to get the return value from the generator.

PHP

<?php
function gen() {
    yield 1;
    return [1];
}

$generator = gen();
foreach ($generator as $value) {
    echo $value . " ";
}
$returnValue = $generator->getReturn();
echo "Return: " . $returnValue;
?>

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

A10

B30

C20

D40

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to get the return value before the generator finishes.

Using getReturn() without iterating the generator first.

The generator returns 20 after yielding 1. The getReturn() method retrieves this value.

3fill in blank

hard

Fix the error in the code to correctly get the generator's return value.

PHP

<?php
function gen() {
    yield 1;
    return [1];
}

$generator = gen();
foreach ($generator as $value) {}
$returnValue = $generator->getReturn();
echo "Return: " . $returnValue;
?>

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

A100

B200

C300

D400

Attempts:

3 left

💡 Hint

Common Mistakes

Calling getReturn() before iterating the generator.

Not yielding any value before returning.

The generator must be iterated before calling getReturn(). Here, the return value is 100.

4fill in blank

hard

Fill both blanks to yield values and return a final value from the generator.

PHP

<?php
function gen() {
    yield [1];
    yield [2];
    return 50;
}

foreach (gen() as $value) {
    echo $value . " ";
}
?>

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

A10

B20

C30

D40

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same value for both yields.

Not returning the final value.

The generator yields 10 and then 30 before returning 50.

5fill in blank

hard

Fill all three blanks to yield values and return a final value, then get the return value.

PHP

<?php
function gen() {
    yield [1];
    yield [2];
    return [3];
}

$generator = gen();
foreach ($generator as $value) {
    echo $value . " ";
}
echo "Return: " . $generator->getReturn();
?>

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

A5

B15

C25

D35

Attempts:

3 left

💡 Hint

Common Mistakes

Not calling getReturn() after iteration.

Mixing up yield and return values.

The generator yields 35 and 15, then returns 25. The return value is printed after iteration.