On Jul 28, 2005, at 9:41 AM, Edward Vermillion wrote:
[snip]
I may be misunderstanding you here, but I don't see why you would
not want to use a variable to define a constant. I do it from
time to time, most common would be in a config document where I'll
check if the page is being accessed via http or https, and define
a constant based on that. I know I could use a variable for this,
but I like using the constant for it's global scope in that case.
I do the same thing. Another thing I like about using "variable"
constants in *some* cases is that they can't be reset to something
else. So if I do something boneheaded in my application, it's not
gonna screw everything up, or at least not leave me open to some
kind of unforseen attack.
[/snip]
For this, it's ok to do, but what I thought you were doing was
something along the lines of
if(3 == $bar) {
define('IAMCONSTANT',"3 bars");
} else {
define('IAMCONSTANT',"not 3 bars");
}
it should just be,
if(defined(USINGHTTPS) or not..
The above example is oversimplified on purpose, but I also don't
practice if(y == x) { define constant = value}, it's usually used to
set things true/false
but not assign a different value to constant.
variables like USINGHTTPS, are more of a "environment variable"
rather than a constant
think of it like $_SUPERGLOBALS .. are variables.. even though they
are available everywhere.. things like phpversion() are constants,
until the next time you compile and install.
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