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<?php function gen($first, $last) { for($i = $first; $i < $last + 1; ++$i) { yield $i; } } echo '5 -> 10:' . PHP_EOL; foreach (gen(5, 10) as $val) { echo $val . PHP_EOL; } $g = gen(1, 5); xdebug_zval('g');
Output for git.master, git.master_jit, rfc.property-hooks
5 -> 10: 5 6 7 8 9 10 Fatal error: Uncaught Error: Call to undefined function xdebug_zval() in /in/fKOBM:13 Stack trace: #0 {main} thrown in /in/fKOBM on line 13
Process exited with code 255.

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