Type declarations for parameters in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare the parameter type as integer.

PHP

<?php
function addOne([1] $num) {
    return $num + 1;
}
?>

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

Abool

Bint

Cfloat

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'string' instead of 'int' for a number parameter.

Forgetting to declare the type at all.

The parameter type int declares that the function expects an integer.

2fill in blank

medium

Complete the code to declare the parameter type as string.

PHP

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

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

Astring

Bbool

Carray

Dfloat

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'array' instead of 'string' for a text parameter.

Not declaring any type, which allows any type.

The parameter type string declares that the function expects a text value.

3fill in blank

hard

Fix the error in the function parameter type declaration.

PHP

<?php
function multiply([1] $value1, int $value2) {
    return $value1 * $value2;
}
?>

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

Anumber

Bfloat

Cinteger

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'integer' instead of 'int' causes a syntax error.

Using 'number' which is not a valid PHP type.

The correct type declaration for integers in PHP is int, not 'integer' or 'number'.

4fill in blank

hard

Fill both blanks to declare parameter types for a function that takes a float and a boolean.

PHP

<?php
function checkValues([1] $score, [2] $passed) {
    if ($passed) {
        return $score;
    }
    return 0;
}
?>

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

Afloat

Bbool

Cint

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'int' instead of 'float' for decimal numbers.

Using 'string' instead of 'bool' for true/false.

The first parameter is a floating-point number, so use float. The second is a true/false value, so use bool.

5fill in blank

hard

Fill all three blanks to declare parameter types for a function that takes a string, an integer, and a boolean.

PHP

<?php
function processData([1] $name, [2] $age, [3] $isMember) {
    if ($isMember) {
        return "Welcome " . $name . ", age " . $age;
    }
    return "Guest";
}
?>

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

Astring

Bint

Cbool

Dfloat

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up types like using 'float' for age.

Not using 'bool' for true/false parameters.

The parameters are a text name (string), an age number (int), and a true/false membership status (bool).