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<?php function count_to_ten() { yield 1; yield 2; yield from [3, 4]; yield from new ArrayIterator([5, 6]); yield from seven_eight(); return yield from nine_ten(); } function seven_eight() { yield 7; yield from eight(); } function eight() { yield 8; } function nine_ten() { yield 9; return 10; } $gen = count_to_ten(); foreach ($gen as $k => $num) { echo "\n-$k -> $num \n"; echo $gen->send('t'); } var_dump( $gen->getReturn());
Output for 7.0.0 - 7.0.20, 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
-0 -> 1 2 -0 -> 3 4 -0 -> 5 6 -0 -> 7 8 -0 -> 9 int(10)

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194.2 ms | 403 KiB | 214 Q