PHP Read and write xml_php instance

What is XML?
XML is a data storage format. It does not define what data is saved, nor does it define the format of the data. XML simply defines the tags and the attributes of those tags. Well-Formed XML tags look like this:

Copy Code code as follows:

<name>jack herrington</name>

Dom reads XML

Copy Code code as follows:

<?php
$doc = new DOMDocument ();
$doc->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";
}
?>

Writing XML with DOM

Copy Code code as follows:

<?php
$books = Array ();
$books [] = Array (
' title ' => ' PHP Hacks ',
' Author ' => ' Jack Herrington ',
);
$doc = new DOMDocument (); Creating a DOM Object
$doc->formatoutput = true;

$r = $doc->createelement ("books");//Create label
$doc->appendchild ($R); Add the label to the XML format.

foreach ($books as $book)
{
$b = $doc->createelement ("book"); Creating labels
$author = $doc->createelement ("author");
$author->appendchild ($doc->createtextnode ($book [' author '])); Add content to a label
$b->appendchild ($author); Add a child label to a parent tag


$r->appendchild ($b); Join the parent Tag!
}

echo $doc->savexml ();
?>

The above is the 2 paragraphs read and write the XML DOM code, the small partners understand no, have any questions can give me a message