Gettype and typeof checks in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the type of the variable $value using gettype.

PHP

<?php
$value = 123;
$type = [1]($value);
echo $type;
?>

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

Atype_of

Btypeof

Cgettype

Dtype

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'typeof' which is not a PHP function.

Trying to use 'type' as a function.

The gettype() function returns the type of a variable as a string in PHP.

2fill in blank

medium

Complete the code to check if the variable $value is of type integer using gettype.

PHP

<?php
$value = 10;
if (gettype($value) === [1]) {
    echo 'Integer detected';
}
?>

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

A'integer'

B'int'

C'number'

D'digit'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'int' instead of 'integer'.

Using 'number' which is not returned by gettype.

The gettype() function returns 'integer' for integer values in PHP.

3fill in blank

hard

Fix the error in the code to correctly check the type of $value using gettype.

PHP

<?php
$value = 3.14;
if ([1]($value) == 'double') {
    echo 'Float detected';
}
?>

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

Atypeof

Btype

Ctype_of

Dgettype

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'typeof' which is not a PHP function.

Using 'type' or 'type_of' which do not exist.

Only gettype() is a valid PHP function to get the type of a variable.

4fill in blank

hard

Fill both blanks to create a dictionary with words as keys and their lengths as values, only for words longer than 3 characters.

PHP

<?php
$words = ['apple', 'cat', 'banana', 'dog'];
$lengths = array();
foreach ($words as $word) {
    if (strlen($word) [1] 3) {
        $lengths[$word] = [2]($word);
    }
}
print_r($lengths);
?>

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

A>

Bstrlen

C<

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' in the condition.

Using 'count' instead of 'strlen' for string length.

We check if the length of the word is greater than 3 using strlen($word) > 3 and then assign the length using strlen($word).

5fill in blank

hard

Fill all three blanks to create an associative array with uppercase keys and values only if the value is a string.

PHP

<?php
$data = ['name' => 'John', 'age' => 30, 'city' => 'Paris'];
$result = array();
foreach ($data as [1] => [2]) {
    if (gettype([2]) === 'string') {
        $result[strtoupper([1])] = [2];
    }
}
print_r($result);
?>

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

Akey

Bvalue

C$value

D$key

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names without '$'.

Mixing up key and value variable names.

In the foreach loop, $key and $value are used to access keys and values. The condition checks if $value is a string, then adds it to $result with uppercase keys.