sprintf(), hash(), uniqid();
header("Content-Type: text/html; charset=UTF-8");$data = sprintf("%04d%02d%02d",2017,8,02);echo $data;echo "";echo "";echo "";echo hash('MD5','test')."";echo hash('SHA256','test')."";echo hash('SHA256',uniqid(rand(),1))."";echo "";echo "";echo "";echo uniqid()."";echo uniqid("",1)."";echo uniqid(rand())."";echo uniqid(rand(),1)."";?>
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