DOM or SAX?

[wompgx]

I want use PHP and XML to deal with Web Form data.

It seemed DOM should be used in Creat and Delet Form.Because it's simple to use.Creat or Append or Delete a node is so simply.

But SAX should be used when update the data such as in Edit Form.Beacause it don't need read all xml file.So the speed will be faster.

which one should i choose.is it practical to use the two all in a same project?

which skill will u choose in your past project?

Give me some advice please!

[daveyboy]

a tricky question. for ease of use, XPath is easily the best option, which is based on DOM, i believe. it's probably the slowest of all, tho.
sax is definitely faster than DOM. nevertheless, if your data is complex, you will probably end up building a huge parser and object tree in PHP, so it may not make much difference or even be quicker if you use DOM and keep it in C, unless you are using huge files.
at any rate, you don't want to be parsing huge files with web scripts. you will only need a few visitors to bring the site to its knees.

[wompgx]

how large size the xml file is while it will affect the speed?

[daveyboy]

the larger the file is, the longer it will take to parse.