This one may actually be 2 questions in one.
Studying some APIs I came across an api suggesting to have operand different from equal (=) inside the query string (http://www.salesboard.com/api/):
mycompany.salesboard.com/api/contacts?CompanyId!=5 or mycompany.salesboard.com/api/contacts?Id<=5
Is that possible?? and by "possible" I mean: is that legal according to the standards? And if yes what are the possible problems to use such a url (compatibility, browser support, etc).
Now the second part of the question is: What is the best way to parse a URL such as this in PHP, has anyone ever used it?
PS: My question is not really problem but I thought it would be nice also for others to know.