Three methods for php to read xml files

This article introduces three methods to read xml files: newDOMDocument (), regular expression parsing xml, and parser function to read xml data. these methods are feasible, but the first one is better than the last one. newDOMDo... this article introduces three methods to read xml files: new DOMDocument (), regular expression parsing xml, and parser function to read xml data. these methods are feasible, but the first one is better than the last one.

The new DOMDocument () instance code is as follows:

 load('books.xml');$books = $doc->getElementsByTagName("book");foreach ($books as $book) {    $authors = $book->getElementsByTagName("author");    $author = $authors->item(0)->nodeValue;    $publishers = $book->getElementsByTagName("publisher");    $publisher = $publishers->item(0)->nodeValue;    $titles = $book->getElementsByTagName("title");    $title = $titles->item(0)->nodeValue;    echo "$title - $author - $publisher/n";}?>

The code for regular expression parsing is as follows:

 (.*?)/
 /s", $xml, $bookblocks);foreach ($bookblocks[1] as $block) {    preg_match_all("//(.*?)/
 /", $block, $author);    preg_match_all("//(.*?)/
 /", $block, $title);    preg_match_all("//
 (.*?)/
 /", $block, $publisher);    echo ($title[1][0] . " - " . $author[1][0] . " - " . $publisher[1][0] . "/n");}?>

The books. xml file is as follows:

    
  
      Jack Herrington   
   PHP Hacks   
   
    O'Reilly
      
     
  
      Jack Herrington   
   Podcasting Hacks   
   
    O'Reilly
      
   
 

The following is an example of using the parser function to read xml data. the code is as follows:

 "; If ($ name) echo $ xml_data ."
";} Function endElement ($ parser_instance, $ element_name) // function for ending a tag event {global $ name, $ position; $ name = false; $ position = false;}?>

The xml file code is as follows:

  
  
  
   
Zhang San
   
  
   
Manager
   
  
  
   
   
    
Li Si
    
   
    
Assistant
    
   
 

Parser is a php built-in parser used to process xml. its work consists of three events: start tag, read data, and end tag.

That is to say, when processing xml, the function performs the corresponding action to convert xml data whenever the start tag, data, and end tag are encountered.

Tutorial link:

Reprint at will ~ However, please keep the tutorial address★