PHP XML read-write creation

One, XML read

1.1. First define the good one XML file with the directory:

Book.xml

<?XML version= "1.0" encoding= "Utf-8"?><Books>  < Book>    <ID>1</ID>    <name>Book 001</name>  </ Book>    < Book>    <ID>2</ID>    <name>Book 002</name>  </ Book>    < Book>    <ID>3</ID>        <name>Book 003</name>  </ Book>    <title>This is the title</title></Books>

1.2 Reading XML via getElementsByTagName

$xml=NewDOMDocument ();$xml->load ("Book.xml");//Read through getElementsByTagNameforeach($xml->getelementsbytagname (' book ') as $book){    $id=$book->getelementsbytagname ("id"); $name=$book->getelementsbytagname ("name"); Echo"ID:".$id->item (0)->nodevalue. ", Name:".$name->item (0)->nodevalue. " <br/> ";}

1.3 Direct Read Properties via Simplexml_import_dom

//   directly read the attribute $simplexmlsimplexml_import_dom($xml) via simplexml_import_dom; Echo "Sid->title:". $simplexml->title;

Echo  "The ID is:". $simplexml->book[0]->id;
Echo  "The ID is:". $simplexml->title;

Ii. creation of XML

2.1. Creating an XML document element from a string

$xmlString=<<<XML<?xml version= "1.0" encoding= "Utf-8"?><books>  < book>    <id>1</id>    <name> book 001</name>  </book>    <book>    <id>2</id>    <name> book 002</name>  </book>    <book>    <id>3 </id>        <name> book 003</name>  </book>    <title> This is the title </title></ Books>XML; $dom=new  DomDocument; $dom->loadxml ($xmlString);

2.2 Creating XML objects through the DOMDocument API (child nodes, node properties, CDATA attribute value tags)

classbuildxml{/** Create an XML element **/    Private functionCreatexml () {$dom=NewDOMDocument ("1.0"); $books=$dom->createelement ("Books");  for($i= 0;$i< 4;$i++) {            $book=$dom->createelement ("book");//add a property to the book node            $price=$dom->createattribute ("Price"); $priceValue=$dom->createtextnode ($i* 10); $price->appendchild ($priceValue); $book->appendchild ($price);//add an ID contact element and assign a value            $id=$dom->createelement ("id"); $idValue=$dom->createtextnode ($i); $id->appendchild ($idValue); $book->appendchild ($id);//add a content to be CDATA identified            $title=$dom->createelement ("title"); $titleValue=$dom->createcdatasection ("This is a content with a CDATA label"); $title->appendchild ($titleValue); $book->appendchild ($title); $books->appendchild ($book); }        $dom->appendchild ($books); return $dom-SaveXML (); }    //Output XML     Public functionPrintxml () {Header("Content-type:text/xml"); Echo $this-Createxml (); }    //Save XML     Public functionSaveXML () {$result=false; Try {            //Open the file you want to write XML data to            $fp=fopen("Newxml.xml", "W"); //Writing XML Data            fwrite($fp,$this-createxml ()); //Close File            fclose($fp); $result=true; } Catch(Exception $e) {            Print $e-GetMessage (); Exit(); }        return $result; }}

2.3 HTTP Output XML

Require_once "buildxml.php";

$xml New  echo$xml->printxml ();

2.4 Saved XML in file form

require_once "buildxml.php"; $xml New buildXML; $xml->savexml ();

PHP XML read-write creation