$_SERVER information in PHP - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print the current script's filename using the $_SERVER superglobal.

PHP

<?php
 echo $_SERVER[[1]];
?>

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

A'SCRIPT_NAME'

B'SERVER_NAME'

C'HTTP_HOST'

D'REQUEST_METHOD'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'SERVER_NAME' instead of 'SCRIPT_NAME' which gives the server's hostname.

Using 'HTTP_HOST' which is the HTTP Host header.

Using 'REQUEST_METHOD' which is the HTTP method used.

The $_SERVER['SCRIPT_NAME'] contains the path of the current script.

2fill in blank

medium

Complete the code to get the client's IP address from the $_SERVER array.

PHP

<?php
 $ip = $_SERVER[[1]];
 echo $ip;
?>

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

A'REQUEST_URI'

B'SERVER_ADDR'

C'REMOTE_ADDR'

D'HTTP_USER_AGENT'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'SERVER_ADDR' which is the server's IP address.

Using 'HTTP_USER_AGENT' which is the client's browser info.

Using 'REQUEST_URI' which is the requested page URI.

The $_SERVER['REMOTE_ADDR'] contains the IP address of the client accessing the script.

3fill in blank

hard

Fix the error in the code to correctly print the request method used by the client.

PHP

<?php
 echo $_SERVER[[1]];
?>

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

A'REQUEST_METHOD'

B'REQUESTMETHOD'

C'METHOD_REQUEST'

D'HTTP_METHOD'

Attempts:

3 left

💡 Hint

Common Mistakes

Using keys without underscore or wrong order of words.

Using keys that do not exist in $_SERVER.

The correct key to get the HTTP request method is 'REQUEST_METHOD'.

4fill in blank

hard

Fill both blanks to create an associative array with the client's browser info and the server's software.

PHP

<?php
 $info = [
   'browser' => $_SERVER[[1]],
   'server' => $_SERVER[[2]]
 ];
 print_r($info);
?>

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

A'HTTP_USER_AGENT'

B'SERVER_SOFTWARE'

C'HTTP_HOST'

D'REMOTE_ADDR'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up client and server keys.

Using keys that do not exist or are unrelated.

$_SERVER['HTTP_USER_AGENT'] gives the client's browser info, and $_SERVER['SERVER_SOFTWARE'] gives the server software details.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps each key in $_SERVER to its length if the length is greater than 10.

PHP

<?php
 $lengths = array_filter(array_map(function($k) {
     return strlen($k);
 }, array_keys($_SERVER)), function($len) {
     return $len [1] 10;
 });

 $result = [];
 foreach ($_SERVER as [2] => [3]) {
     if (strlen([2]) > 10) {
         $result[[2]] = strlen([2]);
     }
 }

 print_r($result);
?>

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

A>

B$key

C$value

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' causing wrong filtering.

Swapping key and value variable names.

Using undefined variables inside the loop.

The comparison operator should be '>' to check length greater than 10. The foreach loop uses $key and $value as variable names for keys and values.