<?php function foo() { echo 'In generator func foo',"\n"; $string = (yield); if ($string == 'world') { echo $string; } var_dump($string); for ($i = 1; $i <= 3; $i++) { yield $i; } echo 'generator done and closed.',"\n"; return; } $generator = foo(); foreach ($generator as $value) echo "$value\n"; $generator->send('world!');
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