bool xml_set_processing_instruction_handler(resource $parser, callable $handler)
Sets the processing instruction (PI) handler function for the XML 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.
TRUE on success or
FALSE on failure.
- resource $parser: A reference to the XML parser to set up processing instruction (PI) handler function.
- callable $handler:
handleris a string containing the name of a function that must exist when xml_parse() is called for
The function named by
handlermust accept three parameters: handler ( resource
parserThe first parameter, parser, is a reference to the XML parser calling the handler.
targetThe second parameter,
target, contains the PI target.
dataThe 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.
Note: Instead of a function name, an array containing an object reference and a method name can also be supplied.
- Instead of a function name, an array containing an object reference and a method name can also be supplied.