PHP XML Expat Parser _php Tutorial

There are two basic types of XML parsers:

Tree-based parser: This parser transforms an XML document into a tree structure. It parses the entire document and provides an API to access the elements of the tree, such as the Document Object Model (DOM).

Event-based parser: treats an XML document as a series of events. When a specific event occurs, the parser invokes the function to process it.

The Expat parser is an event-based parser.

The XML Expat parser is part of the PHP core. These functions can be used without installation.

XML file:

 
  
 
  
  
   
    
   George
  
   
  
   
    
   John
  
   
  
   
    
   Reminder
  
   Don ' t forget the meeting!
 
  

Initialize the XML parser:

 ";     Break    Case ' to ': Echo ' to: ';     Break    Case ' from ': Echo ' from: ';     Break    Case "HEADING": Echo "HEADING:";     Break    Case "BODY": Echo "Message:"; }//function to use at the end of an elementfunction stop ($parser, $element _name) {echo "
";  }//function to use when finding character datafunction char ($parser, $data) {echo $data; }//specify element Handlerxml_set_element_handler ($parser, "Start", "Stop"),//specify data handlerxml_set_character_ Data_handler ($parser, "char"),//open XML File$fp=fopen ("Test.xml", "R"),//read Datawhile ($data =fread ($fp, 4096)) {XML _parse ($parser, $data, feof ($fp)) or Die (sprintf ("XML Error:%s @ line%d", Xml_error_string (Xml_get_error_code ($parse  R)), Xml_get_current_line_number ($parser))); }//free the XML parserxml_parser_free ($parser);? >

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