PHP Array Exercises : Displays array keys and values

Last update on May 30 2025 13:14:13 (UTC/GMT +8 hours)

3. Sorted Capitals from CEU Array

$ceu = array( "Italy"=>"Rome", "Luxembourg"=>"Luxembourg", "Belgium"=> "Brussels", "Denmark"=>"Copenhagen", "Finland"=>"Helsinki", "France" => "Paris", "Slovakia"=>"Bratislava", "Slovenia"=>"Ljubljana", "Germany" => "Berlin", "Greece" => "Athens", "Ireland"=>"Dublin", "Netherlands"=>"Amsterdam", "Portugal"=>"Lisbon", "Spain"=>"Madrid", "Sweden"=>"Stockholm", "United Kingdom"=>"London", "Cyprus"=>"Nicosia", "Lithuania"=>"Vilnius", "Czech Republic"=>"Prague", "Estonia"=>"Tallin", "Hungary"=>"Budapest", "Latvia"=>"Riga", "Malta"=>"Valetta", "Austria" => "Vienna", "Poland"=>"Warsaw") ;

Create a PHP script which displays the capital and country name from the above array $ceu. Sort the list by the name of the capital.

Sample Solution:

PHP Code:

<?php
// Define an associative array with countries as keys and capitals as values
$ceu = array(
    "Italy" => "Rome", "Luxembourg" => "Luxembourg",
    "Belgium" => "Brussels", "Denmark" => "Copenhagen",
    "Finland" => "Helsinki", "France" => "Paris",
    "Slovakia" => "Bratislava", "Slovenia" => "Ljubljana",
    "Germany" => "Berlin", "Greece" => "Athens",
    "Ireland" => "Dublin", "Netherlands" => "Amsterdam",
    "Portugal" => "Lisbon", "Spain" => "Madrid",
    "Sweden" => "Stockholm", "United Kingdom" => "London",
    "Cyprus" => "Nicosia", "Lithuania" => "Vilnius",
    "Czech Republic" => "Prague", "Estonia" => "Tallin",
    "Hungary" => "Budapest", "Latvia" => "Riga",
    "Malta" => "Valetta", "Austria" => "Vienna",
    "Poland" => "Warsaw"
);

// Sort the associative array by values (capitals) in ascending order
asort($ceu);

// Iterate through the sorted array and echo the country and its capital
foreach ($ceu as $country => $capital) {
    echo "The capital of $country is $capital" . "\n";
}
?>

Output:

The capital of Netherlands is Amsterdam                     
The capital of Greece is Athens                             
The capital of Germany is Berlin                            
The capital of Slovakia is Bratislava                       
The capital of Belgium is Brussels                          
The capital of Hungary is Budapest                          
The capital of Denmark is Copenhagen                        
The capital of Ireland is Dublin                            
The capital of Finland is Helsinki                          
The capital of Portugal is Lisbon                           
The capital of Slovenia is Ljubljana                        
The capital of United Kingdom is London                     
The capital of Luxembourg is Luxembourg                     
The capital of Spain is Madrid                              
The capital of Cyprus is Nicosia                            
The capital of France is Paris                              
The capital of Czech Republic is Prague                     
The capital of Latvia is Riga
The capital of Italy is Rome                                
The capital of Sweden is Stockholm                          
The capital of Estonia is Tallin                            
The capital of Malta is Valetta                             
The capital of Austria is Vienna                            
The capital of Lithuania is Vilnius                         
The capital of Poland is Warsaw

Flowchart:

For more Practice: Solve these Related Problems:

Write a PHP script that sorts a given associative array of countries and capitals by the capital names and then displays them in a formatted list.
Write a PHP function that takes an associative array of country-capital pairs, sorts them by capital, and then outputs a string for each pair.
Write a PHP program to sort an associative array by capital city names in descending order and then reverse the order to display ascending results.
Write a PHP script to sort the array by capitals while handling potential missing capital values and output a fallback string where necessary.

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PHP Code Editor:

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