sha512有哪些可能的输出字符？

Question

有哪些可能的字符$code:

$randStr = "some random string that contains only: [a-zA-Z0-9_]";
$code = hash('sha512', $randStr);

Answer 1

SHA512将生成128个字符的小写十六进制字符(0到f),例如

a9046c73e00331af68917d3804f70655a9046c73e00331af68917d3804f70655a9046c73e00331af68917d3804f70655

有关更多信息,请参阅文档hash().