$_REQUEST behavior in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to access a value from the $_REQUEST superglobal.

PHP

<?php
$value = $_REQUEST[[1]];
echo $value;
?>

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

A"email"

B"username"

C"password"

D"age"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the key name.

Using $_REQUEST without a key.

$_REQUEST is an associative array that contains data from GET, POST, and COOKIE. You access values by their key as a string.

2fill in blank

medium

Complete the code to check if a key exists in $_REQUEST.

PHP

<?php
if (isset($_REQUEST[[1]])) {
    echo "Key exists.";
} else {
    echo "Key does not exist.";
}
?>

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

Auser_name

B"user_name"

C"user"

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable without quotes as the key.

Using empty quotes or wrong key name.

Keys in $_REQUEST must be strings, so you need quotes around the key name when checking with isset().

3fill in blank

hard

Fix the error in the code to correctly retrieve a POST value using $_REQUEST.

PHP

<?php
// Assume form method is POST
$name = $_REQUEST[1]"name"];
echo $name;
?>

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

A("

B->

C"

D[

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of square brackets.

Using object operator -> on an array.

To access an element in an array, use square brackets []. Parentheses or arrows are incorrect for arrays.

4fill in blank

hard

Fill both blanks to create a filtered array from $_REQUEST with keys longer than 4 characters.

PHP

<?php
$filtered = array_filter($_REQUEST, function($key) {
    return strlen($key) [1] 4;
}, [2]);
print_r($filtered);
?>

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

A>

B==

CARRAY_FILTER_USE_KEY

DARRAY_FILTER_USE_BOTH

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong comparison operator.

Not specifying the flag to filter by keys.

Use > to check keys longer than 4 characters. Use ARRAY_FILTER_USE_KEY to apply the callback to keys.

5fill in blank

hard

Fill all three blanks to create a new array with uppercase keys and values from $_REQUEST where values are not empty.

PHP

<?php
$result = array_combine(
    array_map([1], array_keys($_REQUEST)),
    array_filter($_REQUEST, function($value) {
        return $value [2] '';
    })
);
print_r($result);
?>

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

Astrtoupper

B!=

C!==

Dempty

Attempts:

3 left

💡 Hint

Common Mistakes

Using empty() inside array_filter callback incorrectly.

Using wrong comparison operators.

Use strtoupper to convert keys to uppercase. Use != to check values not equal to empty string.