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<?php function md5Reverse($hash) : Generator { $stringGenerator = stringGenerator(); foreach($stringGenerator as $string) { if(md5($string) === $hash){ yield $string; } } } function stringGenerator(): Generator { $state = ''; yield $state; } echo md5('');
Output for git.master, git.master_jit, rfc.property-hooks
d41d8cd98f00b204e9800998ecf8427e

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