Settype for changing types in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to change the variable type to integer using settype.

PHP

<?php
$value = "123";
settype($value, [1]);
echo gettype($value); // outputs 'integer'
?>

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

A"string"

B"int"

C"bool"

D"integer"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "int" instead of "integer" (both work but here only "integer" is correct).

Using "string" which does not convert to integer.

Using "bool" which converts to boolean, not integer.

The settype function changes the type of a variable. To convert to integer, use "integer" as the type.

2fill in blank

medium

Complete the code to convert the variable to boolean using settype.

PHP

<?php
$value = 0;
settype($value, [1]);
echo gettype($value); // outputs 'boolean'
?>

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

A"int"

B"bool"

C"string"

D"float"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "boolean" instead of "bool" (both work but here only "bool" is correct).

Using "int" which converts to integer, not boolean.

Using "string" which converts to string.

To convert a variable to boolean, use "bool" as the type in settype.

3fill in blank

hard

Fix the error in the code to correctly convert the variable to float using settype.

PHP

<?php
$value = "3.14";
settype($value, [1]);
echo gettype($value); // outputs 'double'
?>

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

A"float"

B"decimal"

C"double"

D"real"

Attempts:

3 left

💡 Hint

Common Mistakes

Using "double" instead of "float" (both work but here only "float" is correct).

Using "decimal" which is not a valid type.

Using "real" instead of "float" (both work but here only "float" is correct).

In PHP, settype accepts "float" (also "double" or "real") to convert to floating point number. The correct choice here is "float".

4fill in blank

hard

Fill both blanks to create a dictionary with word lengths only for words longer than 3 characters.

PHP

<?php
$words = ["apple", "cat", "banana", "dog"];
$lengths = [];
foreach ($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 '>' causing wrong filtering.

Using 'count' which works on arrays, not strings.

Using 'strlen' incorrectly in the condition.

The condition checks if the word length is greater than 3 using strlen($word) > 3. Then it stores the length using strlen($word).

5fill in blank

hard

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

PHP

<?php
$data = ["a" => 1, "b" => -2, "c" => 3];
$result = [];
foreach ($data as $key => $value) {
    if ($value [1] 0) {
        $result[[2]] = [3];
    }
}
print_r($result);
?>

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

A>

B$value

C$key

Dstrtoupper($key)

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using '$key' instead of 'strtoupper($key)' for keys.

Swapping key and value in the assignment.

The condition checks if the value is greater than zero. The key is converted to uppercase using strtoupper($key). The value is assigned as is.