[nycphp-talk] define variables versus assigned variables
vtbludgeon at gmail.com
Tue Jan 5 09:50:21 EST 2010
On Sun, Jan 3, 2010 at 7:48 AM, <webmaster at vbplusme.com> wrote:
> Hello Eddie,
> Sunday, January 3, 2010, 3:25:22 PM, you wrote:
> > The primary difference between a variable and a constant is
> > mutability. If your database authorization details are not going to
> > change, make them constants. If your database details DO change
> > throughout the execution of a script, make them variables. In regards
> > to the performance of constants in PHP, that's an incredibly minor
> > improvement (a microoptimization, really) and it's my opinion that you
> > ought to be writing software to be good code and not have to hack
> > around considerations like how many microseconds your database
> > username declaration takes.[...]
Though you might also want to consider loading the values from a config
file, which is easy to change when you move your app from place to place,
e.g., from development to production.
Zend_Config makes this especially easy. You set a default configuration
environment and define other flavors that inherit from it.
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