PhpDOM parses xml documents and adds, deletes, modifies, and queries nodes.

PhpDOM is a tree-based parser. you need to regard the xml document as a tree structure (xml document introduction). let's take a look at the following simple xml document: & amp; lt ;? Xmlversion = & quot; 1.0 & quot; encoding = & quot; UT

Php DOM is a tree-based parser, which requires you to regard the xml document as a tree structure (xml document introduction). let's take a look at the following simple xml document:

  
   
   
    
   
    
James
      
   
    
Male
   11   
    
    
   
    
Xiaohong
      
   
    
Female
   21   
    
 

The following operations are performed on the nodes in the class. xml document above:

Php DOM to traverse nodes:

 Load ("class. xml "); $ stus = $ xmldoc-> getElementsByTagName (" stu "); // The value of the access name Node echo $ stus-> item (1) -> getElementsByTagName ("name")-> item (0)-> nodeValue;?>

Add node operation:

 Load ("class. xml "); $ root = $ xmldoc-> getElementsByTagName (" classes ")-> item (0); $ stu_node = $ xmldoc-> createElement (" stu "); // add an attribute $ stu_node-> setAttribute ("intro", "This is a good student") to the student; $ name_node = $ xmldoc-> createElement ("name "); $ name_node-> nodeValue = "www.phpddt.com"; $ stu_node-> appendChild ($ name_node); $ sex_node = $ xmldoc-> createElement ("sex "); $ sex_node-> nodeValue = "male"; $ stu_node-> appendChild ($ sex_node); $ age_node = $ Xmldoc-> createElement ("age"); $ age_node-> nodeValue = 23; $ stu_node-> appendChild ($ age_node); $ root-> appendChild ($ stu_node ); $ xmldoc-> save ("new_class.xml");?>

Delete a node:

 Load ("new_class.xml"); // to delete a file, you must find it $ stus = $ xmldoc-> getElementsByTagName ("stu"); $ stu1 = $ stus-> item (0 ); $ stu1-> parentNode-> removeChild ($ stu1); $ xmldoc-> save ("delete_class.xml");?>

Update node operation:

 Load ("new_class.xml"); // you can update it only when you find it. $ stus = $ xmldoc-> getElementsByTagName ("stu "); // retrieve the first student $ stu1 = $ stus-> item (0); // change the age to 100 $ stutesage = $ stu1-> getElementsByTagName ("age ") -> item (0); $ stutesage-> nodeValue = 100; $ xmldoc-> save ("new_class.xml");?>