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Re: PHP to dynamically generate XML

From: Andy Dingley <dingbat@----------.--->
To: NULL
Date: 7/5/2005 12:19:00 AM
On 4 Jul 2005 12:10:31 -0700, petermichaux@y... wrote:

>I am interested in critisim of how I implemented each method. 

In the second (correct) one you use a DOM and append various elements to
it.

In the first one you generate XML as a string (bad) and then get the DOM
to parse it (super bad).  This is ugly, non-robust and slow.  Don't
duplicate in your application code things that the DOM should be doing.


>For example, one php function queries a database table for a list of CD
>titles. A second php function loops through this CD title list and gets
>the track listing for each CD from another table in the database. 

That's very bad database querying technique. Rather than one query with
a join in it, it's separate queries for the two steps - and the second
step is repeated. If you want long discussions of why this is just so
bad performance-wise, search for "round tripping".


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