What's the best way to create large XML files using PHP MySQL.


Need a quick answer...

I'm coding an end of day batch in PHP that loads all payments for specific products made via the website and bundles them up into XML files, for transmission to a third party for payment.

I just would like ideas as to the best way to do this...

I was about to launch into building arrays and then translating them into XML at the end of the loop?

Ideas? Experience?  Best practice?


Who is Participating?
Ray PaseurConnect With a Mentor Commented:
Here's what I might do (and if you want to show us the data, we can get more specific).

1. Throughout the data gathering period, I would add the data to a MySQL data base table (or maybe more than one table, depending on the data set).
2. At the time the data gathering period ends, I would stop adding data to the MySQL data base.  This stabilization could be achieved by LOCK or by disabling a script, or the process could continue data gathering using a new table.  The idea is to have a stable data set for the creating of the XML.
3. With the stable data set, I would SELECT all of the rows and fields that are needed in the XML document.  I would probably retrieve these with a fetch_object() method.
4. Build the subsets (nodes) of the XML document by using HEREDOC notation and string concatenation.
5. Wrap the XML document in the appropriate wrapper tags and write the document into a directory of the file system to save a copy.  Probably this XML document will be named in a way that will associate it with the date of the transactions.

The method of transmission to the 3rd party will be defined by the 3rd party.

If you can give us some more details (what is "large", who is the 3rd party, what is the format of the SQL tables and the XML document, how will you be transmitting the XML, etc.) maybe we can offer more specific guidance.

Best regards, ~Ray
InsoftserviceConnect With a Mentor Commented:

1> Get data from your respective tables
select * from users
2> Create an array for the same with fetch_object()
3> create xml using array_xml or create an customize one


$xml="<?xml version="1.0"?><rootNode>";

foreach($arr as $key=>$val)
   $xml .= "<text>".$val.</text>;
$xml .="</rootNode></xml>";

echo $xml;
CrisThompsonUKAuthor Commented:
Thanks guys.  The answer is really 'just do it.'

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