php &amp; xml

php & xml

strumer

Hey

I am writing my first xml parser. I am going through the tutorial on this site entitled "PHP and XML: using expat functions." Everything makes sense.. but i had one question.

Is there a way to limit the number of records that are parsed.. or does php force you to parse the whole xml file ?

Say for example.. we take a simple news script.. like in the example.. and i would like to parse / print out only the 2 most recent entries on the html page.

Besides using an ugly counter in the parser class.. is there any other way to do this ?

Chris

ednark

the expat functionality makes use of the
xml_parse function:

pay attention to the 2nd and third paramteres.

data

Chunk of data to parse. A document may be parsed piece-wise by calling xml_parse() several times with new data, as long as the is_final parameter is set and TRUE when the last data is parsed.

is_final (optional)

If set and TRUE, data is the last piece of data sent in this parse.

you can see an example of them used here

http://www.php.net/manual/en/ref.xml.php

you read the external file line by line, and you can just watch for the second time you find the closing tag to your element, then break out all together, or just skip any other of that tag.

is this what you were looking for or did i misunderstand?

strumer

i understand.. thanks.

strumer

I had a question about the element handler...

<i>
bool xml_set_element_handler ( resource parser, string start_element_handler, string end_element_handler)

If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
</i>

from: http://www.php.net/manual/en/function.xml-set-element-handler.php

Anyway.. when i try to set the start_element_handler to either FALSE or "" ... i get alot of warnings like this one...

Warning: Unable to call handler () in /home/picturepage/public_html/picturePage.php on line 108

Is this normal?... i guess i could just turn off the printing of the errors..

any help please ?