Parsing XML using PHP4
By Burhan Khalid2005-08-16
Creating our Parser
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The first step is to create and setup our parser. The xml_parser_create() function will create the parser for us, and return us a handle to that parser. We will then have to setup the different handlers so that the parser knows what to do with each type of information (be it an opening tag, a closing tag, stuff between the tag, etc). Lets first check to make sure that we can create our parser, which is perhaps the least confusing line of code :
PHP:
- if (! ($xmlparser = xml_parser_create()) )
- {
- die ("Cannot create parser");
- }
Once we have created our parser, it is time to configure it to handle our XML file. The xml_set_element_handler() function takes three arguments. The first one is a handle to our xml_parser (which is $xmlparser). The next argument is the name of a function that the parser will call when it finds an open tag, and the last argument is the name of a function that the parser will call when it reaches an ending tag. We are going to write the functions that will be called for each open and close tag. Sounds scary, but it really is very straightforward.
Tutorial Pages:
» Parsing XML using PHP4
» XML File Structure
» Creating our XML File
» Parsing with PHP
» Creating our Parser
» Setting up tag handlers
» Setting up content (data) handlers
» Starting up the parser
» Creating the gallery
© 2004-2005 Burhan Khalid
