I. Using the DOM to generate and read XML files
Example one:
Copy Code code as follows:
<?php
Creates XML string and XML document using the DOM
$dom = new DOMDocument (' 1.0 ');
Add Root-<books>
$books = $dom->appendchild ($dom->createelement_x_x (' books '));
Add <book> element to <books>
$book = $books->appendchild ($dom->createelement_x_x (' book '));
Add <title> element to <book>
$title = $book->appendchild ($dom->createelement_x_x (' title '));
Add <title> text node element to <title>
$title->appendchild ($dom->createtextnode (' Great American Novel '));
Generate XML
$dom->formatoutput = true; Set the formatoutput of DOMDocument to True
Save XML As String or file
$test 1 = $dom->savexml (); Put string in Test1
$dom-> Save (' Test1.xml '); Save As File
?>
Example two:
Copy Code code as follows:
$AA = "111";
$xmlstr = <<<xml
<?xml version= ' 1.0 '?>
<document>
<title>{$aa}</title>
<from>Joe</from>
<to>Jane</to>
<body>
I know that ' s the answer--but what ' s question?
</body>
</document>
XML;
$dom = new DOMDocument;
$dom->loadxml ($XMLSTR);
$test 1 = $dom->savexml ();
$dom->save (' test1.xml ');
Example three:
Test1.xml:
Copy Code code as follows:
<?xml version= "1.0"?>
<books>
<book>
<author>jack herrington</author>
<title>php hacks</title>
<publisher>o ' reilly</publisher>
</book>
<book>
<author>jack herrington</author>
<title>podcasting hacks</title>
<publisher>o ' reilly</publisher>
</book>
</books>
example.php:
Copy Code code as follows:
$doc = new DOMDocument ();
$doc->load (' test1.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";
}
Two. Using simple to generate and read XML files
Example one:
Copy Code code as follows:
?
$xmlstr = <<<xml
<?xml version= ' 1.0 ' standalone= ' yes '?>
<books>
<book>
<title>great American novel</title>
<characters>
<character>
<name>Cliff</name>
<desc>really Great guy</desc>
</character>
<character>
<name>lovely woman</name>
<desc>matchless beauty</desc>
</character>
<character>
<name>loyal dog</name>
<desc>sleepy</desc>
</character>
</characters>
<plot>
Cliff meets lovely Woman. Loyal Dog sleeps, but wakes up to bark
At mailman.
</plot>
<success type= ' bestseller ' >4</success>
<success type= ' bookclubs ' >9</success>
</book>
</books>
XML;
Extract node Content
$xml = new SimpleXMLElement ($XMLSTR);
foreach ($xml->book[0]->success as $success) {
Switch ((string) $success [' type ']) {//Get attributes as element indices
Case ' bestseller ':
Echo $success. ' Months on bestseller list<br> ';
Break
Case ' bookclubs ':
Echo $success. ' Bookclub listings ';
Break
}
}
Modify Text node contents
$xml = new SimpleXMLElement ($XMLSTR);
$xml->book[0]->characters->character[0]->name = ' big Cliff ';
echo $xml->asxml ();
Add a text node for a child element
$xml = new SimpleXMLElement ($XMLSTR);
$character = $xml->book[0]->characters->addchild (' character ');
$character->addchild (' name ', ' Yellow Cat ');
$character->addchild (' desc ', ' aloof ');
$success = $xml->book[0]->addchild (' Success ', ' 2 ');
$success->addattribute (' type ', ' reprints ');
echo $xml->asxml ();
?>
Example two:
Copy Code code as follows:
if (file_exists (' Test1.xml ')) {//Read XML file
$xml = simplexml_load_file (' Test1.xml ');
Var_dump (XML);
} else {
Exit (' Failed to open test1.xml. ');
}
Three. Dom and simple Interop
Dom Import SimpleXML:
Copy Code code as follows:
<?php
$sxe = simplexml_load_string (' <books><book><title>great American
Novel</title></book></books> ');
if ($sxe = = False) {
Echo ' Error while parsing the document ';
Exit
}
$dom _sxe = Dom_import_simplexml ($SXE);
if (! $dom _sxe) {
Echo ' Error while converting XML ';
Exit
}
$dom = new DOMDocument (' 1.0 ');
$dom _sxe = $dom->importnode ($dom _sxe, true);
$dom _sxe = $dom->appendchild ($dom _sxe);
$test 2 = $dom->savexml (); Put string in Test2
$dom-> Save (' Test2.xml '); Save As File
?>
SimpleXML Import DOM:
Copy Code code as follows:
<?php
$dom = new DOMDocument;
$dom->loadxml (' <books><book><title>great American
Novel</title></book> </books> ');
if (! $dom) {
echo ' Error while parsing the document ';
Exit;
}
$s = Simplexml_import_dom ($dom);
Echo $s->book[0]->title;//Great American novel
?>
