Function declaration and calling in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a function named greet.

PHP

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

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

Ahello

BprintMessage

CsayHello

Dgreet

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different function name than the one called.

Forgetting to write the function keyword.

The function name must be greet to match the call later.

2fill in blank

medium

Complete the code to call the function greet.

PHP

<?php
greet[1];
?>

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

A()

B{}

C[]

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the function without parentheses.

Using curly braces or square brackets instead of parentheses.

Functions in PHP are called with parentheses () even if they have no parameters.

3fill in blank

hard

Fix the error in the function declaration to accept one parameter named name.

PHP

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

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

A$name

B*name

C&name

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the dollar sign in the parameter.

Using pointer or reference symbols incorrectly.

In PHP, function parameters must have a dollar sign $ before the variable name.

4fill in blank

hard

Fill both blanks to call the greet function with the argument 'Alice'.

PHP

<?php
greet([1][2]);
?>

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

AAlice

B"Alice"

C'Alice'

DAlice()

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the argument without quotes.

Using a function call instead of a string.

The argument must be a string with quotes. Single quotes or double quotes work, but only one option can be chosen here. The second blank is empty because the quotes include the whole string.

5fill in blank

hard

Fill all three blanks to declare a function named add that takes two parameters and returns their sum.

PHP

<?php
function [1]([2], [3]) {
    return $a + $b;
}
?>

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

Aadd

B$a

C$b

Dsum

Attempts:

3 left

💡 Hint

Common Mistakes

Using parameter names without $.

Using a different function name than add.

The function name is add. The parameters must be variables with $ signs: $a and $b.