XML Processing

XML processing in PHP allows manipulation and interpretation of XML documents. PHP's XML Parser extension helps to parse XML data from strings and files, providing event-driven processing capabilities. This is especially useful during large XML parsing. To process XML in PHP, you first create an XML parser, set functionality through handler functions for the start and end of elements, character data, etc., and then parse the XML data. The xml_parser_create(), xml_set_element_handler(), xml_parse(), and xml_parser_free() functions come into play here. Here's a brief snippet showing XML parsing in PHP:

$parser = xml_parser_create();
xml_set_element_handler($parser, "startElement", "endElement");
xml_parse($parser, $xml_data);
xml_parser_free($parser);