3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ceu = array( "Italy"=>"Rome", "Luxembourg"=>"Luxembourg", "Belgium"=> "Brussels", "Denmark"=>"Copenhagen", "Finland"=>"Helsinki", "France" => "Paris", "Slovakia"=>"Bratislava", "Slovenia"=>"Ljubljana", "Germany" => "Berlin", "Greece" => "Athens", "Ireland"=>"Dublin", "Netherlands"=>"Amsterdam", "Portugal"=>"Lisbon", "Spain"=>"Madrid", "Sweden"=>"Stockholm", "United Kingdom"=>"London", "Cyprus"=>"Nicosia", "Lithuania"=>"Vilnius", "Czech Republic"=>"Prague", "Estonia"=>"Tallin", "Hungary"=>"Budapest", "Latvia"=>"Riga", "Malta"=>"Valetta", "Austria" => "Vienna", "Poland"=>"Warsaw") ; foreach ($ceu as $key=>$value) { echo "The capital of $key is $value".'<br/>'; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
The capital of Italy is Rome<br/>The capital of Luxembourg is Luxembourg<br/>The capital of Belgium is Brussels<br/>The capital of Denmark is Copenhagen<br/>The capital of Finland is Helsinki<br/>The capital of France is Paris<br/>The capital of Slovakia is Bratislava<br/>The capital of Slovenia is Ljubljana<br/>The capital of Germany is Berlin<br/>The capital of Greece is Athens<br/>The capital of Ireland is Dublin<br/>The capital of Netherlands is Amsterdam<br/>The capital of Portugal is Lisbon<br/>The capital of Spain is Madrid<br/>The capital of Sweden is Stockholm<br/>The capital of United Kingdom is London<br/>The capital of Cyprus is Nicosia<br/>The capital of Lithuania is Vilnius<br/>The capital of Czech Republic is Prague<br/>The capital of Estonia is Tallin<br/>The capital of Hungary is Budapest<br/>The capital of Latvia is Riga<br/>The capital of Malta is Valetta<br/>The capital of Austria is Vienna<br/>The capital of Poland is Warsaw<br/>
preferences:
270.52 ms | 408 KiB | 328 Q