(PHP 4, PHP 5)
xml_set_processing_instruction_handler — Set up processing instruction (PI) 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.
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:
If a handler function is set to an empty string, or FALSE, the handler in question is disabled.
Informacja: Zamiast nazwy funkcji może zostać przekazana tablica zawierająca referencję do obiektu i nazwę metody
Zwraca TRUE w przypadku powodzenia, FALSE w przypadku błędu.