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<?php function count_to_ten() { $t = yield from seven_eight(); var_dump($t); return 'ok'; } function seven_eight() { foreach ([1, 2, 3] as $k => $v) {yield $v;} } $gen = count_to_ten(); foreach ($gen as $k => $num) { echo $gen->send('t'); echo "\n-$k -> $num \n"; } var_dump( $gen->getReturn());
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
2 -0 -> 1 NULL -2 -> 3 string(2) "ok"
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected 'from' (T_STRING) in /in/O3RbP on line 5
Process exited with code 255.

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