xml_set_processing_instruction_handler
(PHP 4, PHP 5)
xml_set_processing_instruction_handler —
Set up processing instruction (PI) handler
說明
bool xml_set_processing_instruction_handler
( resource $parser
, callback $handler
)
Sets the processing instruction (PI) handler function for the XML parser
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.
參數
-
parser
-
-
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: 除了函式名稱,還可以用一個包含物件參照和方法名稱的陣列作參數。
Return值
如果成功則回傳 TRUE,失敗則回傳 FALSE。