3v4l.org

run code in 300+ PHP versions simultaneously
<?php function chain(...$iters) { foreach ($iters as $iter) { yield from $iter; } } $gen = (function() { yield 1; yield 2; yield 3; })(); $repeatedTwice = chain($gen, $gen);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '$iter' (T_VARIABLE) in /in/nX2oZ on line 5
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '.', expecting '&' or variable (T_VARIABLE) in /in/nX2oZ on line 3
Process exited with code 255.
preferences:
174.76 ms | 402 KiB | 241 Q