(PHP 3 >= 3.0.6, PHP 4, PHP 5)
xml_set_processing_instruction_handler --
Set up processing instruction (PI) handler
Description
bool
xml_set_processing_instruction_handler ( resource parser, callback handler )
Sets 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:
handler ( resource parser, string target, string data )
- parser
The first parameter, parser, is a
reference to the XML parser calling the handler.
- target
The second parameter, target, contains the PI
target.
- data
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.
Note: Instead of a function name, an
array containing an object reference and a method name can also be
supplied.
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