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<?php /* * yield expression: what is evaluated first: key or value? */ function genkey($key) { echo "(key) $key\n"; return $key; } function value($value) { echo "(value) $value\n"; return $value; } $gen = function() { foreach(range(0, 2) as $i) { yield genkey(chr(65+$i)) => value($i); } }; iterator_to_array($gen());
Output for git.master, git.master_jit, rfc.property-hooks
(key) A (value) 0 (key) B (value) 1 (key) C (value) 2

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