如何区分SHA1字符串和日期时间字符串？

Question

Basically I have two options:

$one = "fdfeb16f096983ada02db49d46a8154475d700ae";
$two = "2011-12-28 05:20:01";

I need some sort of regex, so that I can detect wether the string follows the pattern in $one, or the pattern in $two

Detect if the string is sha1 or datetime.

What would be the best way to determine this?

Thanks

Answer 1

if (preg_match($one, $string) {
    echo "$string matches $one";
} else if (preg_match($two, $string) {
    echo "$string matches $two";
}