XML DOM in PHP (11)

Source: Internet
Author: User
Tags save file
7. Create a Node

In DOM operations, adding and deleting operations must find the parent node

1, DomElement domdocument::createelement (String $name [, String $value])

Creates a node and returns a Node object

String $name: Name of the node (element name)

[, String $value]: The value of the node

2. Domnode domnode::appendchild (Domnode $newnode)

Append child nodes

Domnode $newnode: Child nodes

3, int domdocument::save (string $filename)

Saves data in the DOM to the specified file

4. DocumentElement property, representing the root node in the DOM model

 PHP Header ('content-type:text/html;charset=gb2312' ); $dom=NewDOMDocument ('1.0','Utf-8' ); $dom->load ('Demo01.xml' );//Creating a node simply means creating the node object in memory, but this object and our previous//DOM model doesn't have any connection .$person = $dom->createelement (' Person' ); $name= $dom->createelement ('name','Huangliu' ); $age= $dom->createelement (' Age',' -' );//Append name and age as child nodes to the person node$personappendchild ($name); $person-appendchild ($age);//$dom->getelementsbytagname (' persons ')->item (0)->appendchild ($newnode)//Append person to child node to root node$dom->documentelement->appendchild ($person);//Resave all data in the DOM to the Demo01.xml file$dom->save ('Demo01.xml');

Results:

 
          
  
   
    
   huangliu
  
           
  
       
 
  

8. Deleting nodes

Domnode domnode::removechild (Domnode $oldnode)

Domnode $oldnode: The node object to be deleted

Example: Remove the following blue section

 
  PHP    'content-type:text/html;charset=gb2312'  );     New ' 1.0 ' ' Utf-8 '  );    $dom'demo01.xml'  ); // first find the Node object    to delete '  Person ' 1  ); // Delete    a node $dom->documentelement->removechild ($person); // re-save the file    ' Demo01.xml ' );

9. Modify the Node

Domnode Domnode::replacechild (Domnode $newnode, Domnode $oldnode)

Domnode $newnode: New node

Domnode $oldnode: Original node

 PHP Header ('content-type:text/html;charset=gb2312' ); $dom=NewDOMDocument ('1.0','Utf-8' ); $dom->load ('Demo01.xml' );//find the node to be replaced$oldNode = $dom->getelementsbytagname (' Person')->item (2 );//Create a new node$person = $dom->createelement (' Person' ); $name= $dom->createelement ('name','Songjiang' ); $age= $dom->createelement (' Age', - ); $person-appendchild ($name); $person-appendchild ($age);//replace the original node with the new node$dom->documentelement->replacechild ($person, $oldNode);//Save File$dom->save ('Demo01.xml');

10. Save

? String Domdocument::savexml

Saving data in the DOM to a string variable

? int Domdocument::save (string $filename)

Saves data in the DOM to the specified file

11, about the attributes of the deletion and modification

1. Domattr Domelement::setattribute (String $name, String $value)

Add Property

String $name: Property name

String $value: Property value

Add the id= ' s102 ' attribute to person

 
  PHP    'content-type:text/html;charset=gb2312'  );     New ' 1.0 ' ' Utf-8 '  );    $dom'demo01.xml'  ); // Add id attribute to second person // find a second person    '  Person ' 1  ); // Add id attribute    ' ID ' ' s102 '  ); // Save File    ' Demo01.xml ' );

2. Domattr Domelement::setattribute (String $name, String $value)

modifying properties

String $name: Property name

String $value: Property value

If a node does not have this attribute, the attribute is added (note the difference from the above)

If a node already exists for this property, it indicates that the property is modified

3, bool Domelement::removeattribute (string $name)

Delete attribute (not delete node)

$name: The property to be deleted

 
  PHP    'content-type:text/html;charset=gb2312'  );     New ' 1.0 ' ' Utf-8 '  );    $dom'demo01.xml'  ); // Delete the id attribute of the 2nd person // find a second person    '  Person ' 1  ); // Delete id attribute    $person->removeattribute ('ID'); // Save File    ' Demo01.xml ' );

4. Get Properties

String Domelement::getattribute (String $name)

String $name: Property name

 
  PHP    'content-type:text/html;charset=gb2312'  );     New ' 1.0 ' ' Utf-8 '  );    $dom'demo01.xml'  ); // Query the id attribute of a 1th person // find a 1th person.    '  Person ' 0  ); // Query ID Property    echo $person->getattribute ('ID');

SimpleXML

PHP DOM: Adding and deleting changes

SimpleXML: Query

First, read the XML

1. SimpleXMLElement simplexml_load_file (String $filename)

Reading data from an XML file

String $filename: XML file name

2, Simplexmlelement::__construct (string data)

Reading data from a string

String in data:xml format

If the data is saved to a file, use Simplexml_load_file to read

If the data is saved to a string, the constructor method of the SimpleXMLElement class is used to read

The above describes the XML DOM (11) in PHP, including aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

  • Related Article

    Contact Us

    The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

    If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

    A Free Trial That Lets You Build Big!

    Start building with 50+ products and up to 12 months usage for Elastic Compute Service

    • Sales Support

      1 on 1 presale consultation

    • After-Sales Support

      24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.