PHP绝对独特，随机字符串

Question

Is there any php function in our time, which generates absolutely unique, random string? Or rephrase the question, how to make absolutely unique and random string in php in our time? Is it enough to combine couple of randomizing functions?

Answer 1

Just to be nitpicky... If it has to be unique then it's not really "random". Randomness includes the possibility of duplication, since generating a random state doesn't depend on (or refer to) previous states.

Do you just want to create a GUID? PHP has a couple methods for generating random IDs:

• The uniquid() function
• The com_create_guid() function

Some other people have also found ways to do this, it seems.