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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 if ($cmd == 'stop') { echo 'Stopped the generator during iteration ',$times,"\n"; return; } } } $gen = nums(); $times = 1; foreach ($gen as $value) { echo "$value at iteration $times","\n"; $times++; if ($value == 28) { // don't let it get to 32 $gen->send('stop'); } }
Output for git.master, git.master_jit, rfc.property-hooks
24 at iteration 1 26 at iteration 2 28 at iteration 3 Stopped the generator during iteration Warning: Undefined variable $times in /in/tngG6 on line 8

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