xml_set_processing_instruction_handler
Set up processing instruction (PI) handler
Description
bool xml_set_processing_instruction_handler
( resource $parser
, callable $handler
)
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.
Parameters
-
parser
-
A reference to the XML parser to set up processing instruction (PI) handler function.
-
handler
-
handler is a string containing the name of a
function that must exist when xml_parse is called
for parser.
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.
Note: Instead of a function name, an
array containing an object reference and a method name can also be
supplied.
Return Values
Returns TRUE on success or FALSE on failure.