Re: PHP - require or include

On 10/3/07, Simon Cockayne <simon.cockayne@xxxxxxxxx> wrote:

Hi Larry, Jim, Joel,

*** In addition to echo you can also use: include, include_once, require
or
require_once, to bring in the contents of another file...which could
contain
straight HTML or code to produce HTML.

See http://devzone.zend.com/manual/function.require.html.


This is an excellent way to modularise your code...i.e. a change to the
included/required file is rippled throughout all files that
include/require
it, e.g:

By and far my favorite feature of PHP. All my websites are designed with
this modular approach. It allows me to have a single file for updating the
banner, another for the footer, another for the navigation, etc. etc. I can
change the entire site by updating a single file. Very handy. In fact, for
you to take advantage of reusable OO PHP code, this is necessary (I
recommend require_once for OO includes).

BUT: let's not confuse things and say it is a replacement for echo(),
because it isn't. They serve two distinct functions: echo outputs to
standard out (in PHP's case, this is back to the browser). All the include
functions do is bring the contents of another file into the current code,
kind of like a /copy in RPG. They bring them in at the exact placement of
the statement and they may or may not contain code that gets directly
outputted to the browser. As I mentioned above, they may simply include
class definitions or functions.

I just felt it was an important distinction.