(PHP 3 = 3.0.6, PHP 4 )
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:
The function named by
handler must accept three parameters: handler
( resource parser, string target, string data)
The first parameter,
parser, is a reference to the XML parser
calling the handler.
The second parameter,
target, contains the PI target.
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.
注: 除了函數名稱, 也提供一個包含物件參考的陣列和一個方法名稱。