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<?php $a = range(1, 10); $b = range('a', 'f'); $c = range('A', 'B'); $output = []; foreach ([$a, $b, $c] as $i => $array) { foreach ($array as $k => $v) { $output[$k][$i] = $v; } } var_export(implode(array_merge(...$output)));
Output for git.master, git.master_jit, rfc.property-hooks
'1aA2bB3c4d5e6f78910'

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