(PHP 4, PHP 5, PHP 7)
xml_set_processing_instruction_handler — Set up processing instruction (PI) handler
xml_set_processing_instruction_handler ( XMLParser $parser , callable $handler ) : bool
Sets the processing instruction (PI) handler function for the XML parser parser.
A processing instruction has the following format:
<?
?>
?>) 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. 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 ( XMLParser $parser , string $target , string $data )
parser
target
target, contains the PI target. data
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.
Returns true on success or false on failure.
| Version | Description |
|---|---|
| 8.0.0 | parser expects an XMLParser instance now; previously, a resource was expected. |
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https://www.php.net/manual/en/function.xml-set-processing-instruction-handler.php