Password hashes in url

I know the topic seems similar to another post, but the topic is on a different matter than that. Basically, through my practice I've noticed that I'm going to need to use urls that have the password hash in it - i.e. using items and such. Is the password has available somehow that I can use to assemble my string. Like for using a seal tooth it would be:
Code:
[url]http://127.0.0.1:60080/inv_use.php?pwd=*PASSWORDHASHHERE*&which=3&whichitem=2[/url]

I don't quite understand the use of encode and decode URL but they were mentioned in a previous topic just not for this subject.
 
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