3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo PHP_EOL,'1)',PHP_EOL; $a = [1,2,3]; foreach($a as $v) {echo "{$v} - ", current($a), PHP_EOL;} echo PHP_EOL,'2)',PHP_EOL; $a = [1,2,3]; $b = &$a; foreach($a as $v) {echo "$v\n"; unset($a[1]);} echo PHP_EOL,'3)',PHP_EOL; $a = [1,2,3]; foreach($a as &$v) {echo $v . " - " . current($a) . "\n";}
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.21, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.7
1) 1 - 1 2 - 1 3 - 1 2) 1 2 3 3) 1 - 1 2 - 1 3 - 1
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.30
1) 1 - 2 2 - 2 3 - 2 2) 1 3 3) 1 - 2 2 - 3 3 -
preferences:
190.33 ms | 402 KiB | 275 Q