3v4l.org

run code in 300+ PHP versions simultaneously
<?php $teams=array('team_one','team_two','team_three'); foreach($teams AS $team) { foreach($teams AS $opposition) { if($team != $opposition) { echo "$team v $opposition\n"; } } }
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, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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
team_one v team_two team_one v team_three team_two v team_one team_two v team_three team_three v team_one team_three v team_two
preferences:
260.8 ms | 406 KiB | 348 Q