xml_set_processing_instruction_handler
Set up processing instruction (PI) handler
Description
true xml_set_processing_instruction_handler(XMLParser $parser, callable $handler)
A processing instruction has the following format:
Caution
PHP code is delimited by the <?php
processing instruction.
As such it is possible to have PHP code within an XML document.
However, the PI end tag (?>) must not be part of
the data.
If a PI end tag exists as part of the embedded PHP code,
the rest of the PHP code and the "real" PI end tag, will be treated
as character data.
Parameters
-
parser
-
The XML parser.
-
handler
-
If null or an empty string is passed, the handler is reset to its default state.
If handler is a callable,
the callable is set as the handler.
If handler is a string,
it can be the name of a method of an object set with
xml_set_object.
The signature of the handler must be:
void handler(XMLParser $parser, string $target, string $data)
-
parser
-
The XML parser calling the handler.
-
target
-
The processing instruction target.
-
data
-
The processing instruction data.
Return Values
Always returns true.