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<?php function nums() { $ary = [24,25,26,27,28,29,30,31,32]; for($x = 0, $max = count($ary); $x < $max; $x += 2) { $cmd = (yield $ary[$x]); // yield expr var_dump($cmd); if ($cmd == 'stop') { echo 'Stopping the generator ...',"\n"; return; } } echo "Generator ran its course and is closed","\n"; return; } $gen = nums(); foreach ($gen as $value) { echo "$value\n"; if ($value == 28) { // don't let it get to 32 $gen->send('stop'); } }

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