Parameters and arguments in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function that takes one parameter.

PHP

<?php
function greet([1]) {
    echo "Hello, $name!";
}
?>

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

Agreet

B$greet

C$name

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the $ sign before the parameter name.

Using the function name as a parameter.

The parameter must include the $ sign in PHP, so $name is correct.

2fill in blank

medium

Complete the code to call the function with the argument 'Alice'.

PHP

<?php
function greet($name) {
    echo "Hello, $name!";
}
greet([1]);
?>

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

Aname

B"Alice"

C$name

DAlice

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the argument without quotes.

Using variable names instead of string literals.

Arguments that are strings must be enclosed in quotes, so "Alice" is correct.

3fill in blank

hard

Fix the error in the function definition by completing the parameter list.

PHP

<?php
function add([1]) {
    return $a + $b;
}
?>

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

A$a, $b

B$a $b

Ca, b

D$a; $b

Attempts:

3 left

💡 Hint

Common Mistakes

Missing commas between parameters.

Omitting $ signs before parameter names.

Parameters must be separated by commas and each must have a $ sign, so $a, $b is correct.

4fill in blank

hard

Fill both blanks to complete the function call with two arguments.

PHP

<?php
function multiply($x, $y) {
    return $x * $y;
}
$result = multiply([1], [2]);
?>

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

A5

B"5"

C10

D"10"

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around numbers unnecessarily.

Passing strings instead of numbers.

Arguments can be numbers without quotes, so 5 and 10 are correct.

5fill in blank

hard

Fill all three blanks to create a function with a default parameter and call it.

PHP

<?php
function greetUser([1] = [2]) {
    echo "Hello, $name!";
}
greetUser([3]);
?>

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

A$name

B"Guest"

C"Alice"

DGuest

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the $ sign in the parameter.

Not using quotes for string default values.

Passing argument without quotes.

The parameter must have a $ sign, the default value must be a string with quotes, and the argument can be a string with quotes.