XML DOM in PHP (10)

1.PHP DOM (1)

Dom in PHP is not the same as JavaScript, and attributes do not have to add another node

2. Main classes

DOMDocument: Document class

Domnodelist: Node List class

Domnode: Node class

DomElement: Element class

3. DOMDocument class

3.1 Creating a Document object

Domdocument::__construct ([String $version [, String $encoding])

[String $version: Version number

[, String $encoding]] : Character Set

3.2. Loading the XML file

Mixed Domdocument::load (string $filename)

String $filename: The name of the XML file to load

3.3. Get the Node

Domnodelist domdocument::getelementsbytagname (string name)

String Name: The name of the node to get

Example: demo.php

 PHP Header ('content-type:text/html;charset=gb2312' );//parsing demo01.xml with PHP//instantiating a DOM object$dom =NewDOMDocument ();//loading an XML file$dom->load ('Demo01.xml' );//get the person node through the DOM object, note: Here The return value is a Domnodelist class object$persons = $dom->getelementsbytagname (' Person' );//There are several personEcho'Total'. $persons->length.'Personal
';//output total of two people//Select Person with index 0, which is the first one$person = $persons->item (0 );//Gets the name node under this person, and the return is still a Domnodelist class object$names = $person->getelementsbytagname ('name' ); //Output NameEcho $names->item (0)->nodevalue.'
';//output ' Zhang San 'Why do we have to take the nodelist two times? Please refer to because there are two nodes

Demo.xml

 
  "1.0" encoding="UTF-8"?>
 
      
  
   
    
   "
   
     S101
   
    "        
   
     > Zhangsan    
  
    
   
    
       
  
           
   
     wangwu    
  
    
   
    
   
 
  

4. Domnodelist class (The person above is the nodelist node)

1. Length

There are several nodes in the current node list

2, domelement domnodelist::item (int $index)

Select the node indexed as index

int $index: Index

5, Domnode class

1, the value of the NodeValue node

6, about the property read

1, bool Domelement::hasattribute (string $name)

Determine if there is a property (only one property is judged to have one)

String $name: Property name

2, bool Domnode::hasattributes (void)

Determine if there is a property (as long as the property returns True)

3, String Domelement::getattribute (String $name)

Gets the property value of the specified property

String $name: Property name

Example 2. Output with coherent operation

 
  PHP    new'1.0'utf-8'  );    $dom'demo01.xml'  ); // want the name    of the first person '  Person ' 0 )    'name'0 ,nodevalue; output: Zhang San

Example3:

 PHP Header ('content-type:text/html;charset=gb2312' ); $dom=NewDOMDocument ('1.0','Utf-8' ); $dom->load ('Demo01.xml' ); $person= $dom->getelementsbytagname (' Person')->item (0 );//To determine if a node has an id attribute    if($person->hasattribute ('ID') {echo'with id attribute'; } Else{echo'No id attribute'; } Echo'
';//determine if a node has attributes    if($personhasattributes ()) {echo'has attributes'; } Else{echo'does not have any attributes'; } Echo'
';//Gets the id attribute value of the first personEcho $person->getattribute ('ID');

The previous example can only get a single piece of data, now I want to get all the full information, how to achieve?

Example 4:

What if this property has to be traversed?

 PHP Header ('content-type:text/html;charset=gb2312' ); $dom=NewDOMDocument ('1.0','Utf-8' ); $dom->load ('Demo01.xml' );//Get all person nodes$persons = $dom->getelementsbytagname (' Person' );//total number of persons received$count = $personslength;  for($i =0; $i < $count; $i + +) {    //$person represents the first person$person = $personsitem ($i); Echo'Section'. ($i +1) .'Individual's'; if($person->hasattribute ('ID') {echo'School Number:'. $person->getattribute ('ID' ); } Echo'Name:'. $person->getelementsbytagname ('name')->item (0),NodeValue; Echo'Age:'. $person->getelementsbytagname (' Age')->item (0),NodeValue; Echo'
'; }?>

The above describes the XML DOM (10) in PHP, including aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

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