3v4l.org

run code in 300+ PHP versions simultaneously
<?php function gen() : \Generator { $str = ''; while (FALSE !== $v = yield) { $str .= $v; } print "str\n"; } $gen = gen(); $gen->send('Hello'); $gen->send(' '); $gen->send('world'); $gen->send(FALSE);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 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 - 8.2.19, 8.3.0 - 8.3.7
str
preferences:
160.08 ms | 404 KiB | 173 Q