XML Functions
As of Version 3.0.6, PHP has XML support built on top of James Clark’s expat library (see http://www.guardian.no/~ssb/phpxml.html).
XML Event Handlers
PHP’s XML support is event-driven. This means you can set up functions that can handle different types of data from the parser. Here are the different types of handlers.
- Element handlers
Called when the parser encounters start and end elements (tags)
- Character data handler
Called when nonmarkup character data is found
- Processing instruction (PI) handler
Called for processing instruction information; PHP code, among other things, can be embedded into such markup
- Notation declaration handler
Called for notation definitions (notations are a way of declaring data formats)
- External entity reference handler and unparsed entity declaration handler
Called for entity references and declarations
- Default handler
Called for data that is not covered by any other handler
Character Encoding
The XML extension supports three character sets: US-ASCII, ISO-8859-1, and UTF-8 encoded Unicode. Input (source) and output (target) encoding can be controlled separately. UTF-16 is not supported.
Function Reference
Here are the XML functions provided by PHP:
- string utf8_decode(string data)
Convert a UTF-8 encoded string to ISO-8859-1
- string utf8_encode(string data)
Encode an ISO-8859-1 string to UTF-8
- string xml_error_string(int code)
Get XML parser error string
- int xml_get_current_byte_index(int parser)
Get the current byte index for the XML ...
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