问题
I've got a string that contains UUID v4
$uuid = 'http://domain.com/images/123/b85066fc-248f-4ea9-b13d-0858dbf4efc1_small.jpg';
How would i get the b85066fc-248f-4ea9-b13d-0858dbf4efc1 value from the above using preg_match()?
More info on UUID v4 can be be found here
回答1:
$uuid = 'http://domain.com/images/123/b85066fc-248f-4ea9-b13d-0858dbf4efc1_small.jpg';
preg_match('!/images/\d+/([a-z0-9\-]*)_!i', $uuid, $m);
And
preg_match('/[a-f0-9]{8}\-[a-f0-9]{4}\-4[a-f0-9]{3}\-(8|9|a|b)[a-f0-9]{3}\-[a-f0-9]{12}/', $uuid, $m);
works too. Taken from here, but I don't know if we can rely on that.
回答2:
You can try this simple pattern for uuids
preg_match('/\w{8}-\w{4}-\w{4}-\w{4}-\w{12}/',$uuid,$matches);
来源：https://stackoverflow.com/questions/6223185/php-preg-match-uuid-v4