迭代一个角色系列

I want to iterate through all 5 character combinations of 0-9, a-z.

I worked it at to be around 52 millions combinations. How can I programatically iterate through all the possibilities in PHP? - like counting up or something?

Use base_convert($n, 10, 36) counting from 0 to 36**5-1, and pad with zeroes via sprintf().

I tried to provide an answer, but kept getting stuck with it.

So I'll post maybe the only useful portion. To get a list of all those chars easily, the following should do the trick.

$pool = range(0, 9) + range('a', 'z');