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<?php function genmer($gens) { foreach($gens as $gen) { while($gen->valid()) { yield $gen->current(); $gen->next(); } } } function gen_one_to_three() { for ($i = 1; $i <= 3; $i++) { // Note that $i is preserved between yields. yield $i; } } $merged = [$on, $two, $three]; foreach($merged as $m) { foreach($m as $g) { var_dump($g); } }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $on in /in/PbNrl on line 20 Warning: Undefined variable $two in /in/PbNrl on line 20 Warning: Undefined variable $three in /in/PbNrl on line 20 Warning: foreach() argument must be of type array|object, null given in /in/PbNrl on line 23 Warning: foreach() argument must be of type array|object, null given in /in/PbNrl on line 23 Warning: foreach() argument must be of type array|object, null given in /in/PbNrl on line 23

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