Reliability of some $_SERVER elements.

[JasonLewis]

I'm curious as to how reliable some of the $_SERVER elements are, mainly the ones related to the URI and Query String.

 

What I'm doing is building a query string using $_SERVER['QUERY_STRING'], however I'm unsure of how reliable it is

 

I am aware that a few of the elements in the predefined variable can be unreliable, but what about the QUERY_STRING element?

 

Cheers.

[ChemicalBliss]

What you see is what you get on this var. Every http server needs a request uri. Therefor it will be populated in every condition except one:

When a PHP script is run from a command line or similar. Although I'm pretty sure this variable still populates even under those circumstances.

 

-cb-

[AbraCadaver]

The $_SERVER vars are populated by the webserver, not PHP, so they are implementation dependent.  Take a look at the cgi spec.  I would assume that all of these will be implemented by modern webservers:  http://web.archive.org/web/20071018185254/http://hoohoo.ncsa.uiuc.edu/cgi/env.html

[JasonLewis]

The $_SERVER vars are populated by the webserver, not PHP, so they are implementation dependent.  Take a look at the cgi spec.  I would assume that all of these will be implemented by modern webservers:  http://web.archive.org/web/20071018185254/http://hoohoo.ncsa.uiuc.edu/cgi/env.html

 

Well, according to that page in regards to QUERY_STRING:

 

This variable should always be set when there is query information, regardless of command line decoding.

 

Very good. Thanks for that link.

 

Thanks for your time guys. Appreciate it.