(PHP 3>= 3.0.6, PHP 4 )
xml_set_processing_instruction_handler -- Set up processing instruction (PI) handlerSets the processing instruction (PI) handler function for the XML parser parser. handler is a string containing the name of a function that must exist when xml_parse() is called for parser.
A processing instruction has the following format:
You can put PHP code into such a tag, but be aware of one limitation: in an XML PI, the PI end tag (?>) can not be quoted, so this character sequence should not appear in the PHP code you embed with PIs in XML documents. If it does, the rest of the PHP code, as well as the "real" PI end tag, will be treated as character data.The function named by handler must accept three parameters:
The first parameter, parser, is a reference to the XML parser calling the handler.
The second parameter, target, contains the PI target.
The third parameter, data, contains the PI data.
If a handler function is set to an empty string, or false, the handler in question is disabled.
True is returned if the handler is set up, false if parser is not a parser.
There is currently no support for object/method handlers. See xml_set_object() for using the XML parser within an object.
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