I'm aware of how to drill down into the nodes of an xml document as described here:
http://www.php.net/manual/en/simplexml.examples-basic.php
but am at a loss on how to extract the value in the following example
$xmlStr = '<Error>Hello world. There is an Error</Error>';
$xml = simplexml_load_string($xmlStr);
simplexml_load_string returns an object of type SimpleXMLElement whose properties will have the data of the XML string.
In your case there is no opening <xml> and closing </xml> tags, which every valid XML should have.
If these were present then to get the data between <Error> tags you can do:
$xmlStr = '<xml><Error>Hello world. There is an Error</Error></xml>';
$xml = simplexml_load_string($xmlStr);
echo $xml->Error; // prints "Hello world. There is an Error"
What do you know. The value of the tag is just:
$error = $xml;
Thanks for looking :)
Related
I want to generate xml by using php simplexml.
$xml = new SimpleXMLElement('<xml/>');
$output = $xml->addChild('child1');
$output->addChild('child2', "value");
$output->addChild('noValue', '');
Header('Content-type: text/xml');
print($xml->asXML());
The output is
<xml>
<child1>
<child2>value</child2>
<noValue/>
</child1>
</xml>
What I want is if the tag has no value it should display like this
<noValue></noValue>
I've tried using LIBXML_NOEMPTYTAG from Turn OFF self-closing tags in SimpleXML for PHP?
I've tried $xml = new SimpleXMLElement('<xml/>', LIBXML_NOEMPTYTAG); and it doesn't work. So I don't know where to put the LIBXML_NOEMPTYTAG
LIBXML_NOEMPTYTAG does not work with simplexml, per the spec:
This option is currently just available in the DOMDocument::save and DOMDocument::saveXML functions.
To achieve what you're after, you need to convert the simplexml object to a DOMDocument object:
$xml = new SimpleXMLElement('<xml/>');
$child1 = $xml->addChild('child1');
$child1->addChild('child2', "value");
$child1->addChild('noValue', '');
$dom_sxe = dom_import_simplexml($xml); // Returns a DomElement object
$dom_output = new DOMDocument('1.0');
$dom_output->formatOutput = true;
$dom_sxe = $dom_output->importNode($dom_sxe, true);
$dom_sxe = $dom_output->appendChild($dom_sxe);
echo $dom_output->saveXML($dom_output, LIBXML_NOEMPTYTAG);
which returns:
<?xml version="1.0" encoding="UTF-8"?>
<xml>
<child1>
<child2>value</child2>
<noValue></noValue>
</child1>
</xml>
Something worth pointing out... the likely reason that the NOEMPTYTAG option is available for DOMDocument and not simplexml is that empty elements are not considered valid XML, while the DOM specification allows for them. You are banging your head against the wall to get invalid XML, which may suggest that the valid self-closing empty element would work just as well.
Despite the quite lengthy answers already given - which are not particularly wrong and do shed some light into some libxml library internals and it's PHP binding - you're most likely looking for:
$output->noValue = '';
To add an open tag, empty node-value and end tag (beautified, demo is here: http://3v4l.org/S2PKc):
<?xml version="1.0"?>
<xml>
<child1>
<child2>value</child2>
<noValue></noValue>
</child1>
</xml>
Just noting as it seems it has been overlooked with the existing answers.
Since Simple XML is proving troublesome, perhaps XMLWriter could do what you want.
Here's a fiddle
<?php
$oXMLWriter = new XMLWriter;
$oXMLWriter->openMemory();
$oXMLWriter->startDocument('1.0', 'UTF-8');
$oXMLWriter->startElement('xml');
$oXMLWriter->writeElement('child1', 'Hello world!!');
$oXMLWriter->writeElement('noValue', '');
$oXMLWriter->endElement();
$oXMLWriter->endDocument();
echo htmlentities($oXMLWriter->outputMemory(TRUE));
?>
Output:
<?xml version="1.0" encoding="UTF-8"?>
<xml>
<child1>Hello world!!</child1>
<noValue></noValue>
</xml>
Extending from my comments (some got deleted):
The behavior depends on your environment. This same code:
$xml = new SimpleXMLElement('<xml/>', LIBXML_NOEMPTYTAG);
$output = $xml->addChild('child1');
$output->addChild('child2', "value");
$output->addChild('noValue', '');
echo $xml->asXML();
In 3v4l.org and Ideone.com, it produces self-closing tag;
In eval.in, codepad.org and on my localhost (PHP 5.3/5.4, libXML 2.7, Windows), it produces empty tag.
Since according to PHP document, LIBXML_NOEMPTYTAG only (guarenteed to) work in DOM, you may want to try DOM for ensurance:
$dom=new DOMDocument("1.0","UTF-8");
$dom->formatOutput=true;
$root=$dom->createElement("xml");
$dom->appendChild($root);
$child1=$dom->createElement("child1");
$root->appendChild($child1);
$node=$dom->createElement("child2");
$node->appendChild($dom->createTextNode("value"));
$child1->appendChild($node);
$node=$dom->createElement("noValue");
$child1->appendChild($node);
echo $dom->saveXML($dom,LIBXML_NOEMPTYTAG);
3v4l.org demo.
Edit:
All the above online demo site uses Content-Type: text/plain by default. If you want to directly output XML to browser as a standalone resource, you can specify the header before output:
header("Content-Type: text/xml");
echo $dom->saveXML($dom,LIBXML_NOEMPTYTAG);
I had to get the child node and asign to the nodeValue property an empty string, and the xml close tag appears.
$output->childNodes[1]->nodeValue = '';
Greetings.
If I use the following php code to convert an xml to json:
<?php
header("Content-Type:text/json");
$resultXML = "
<QUERY>
<Company>fcsf</Company>
<Details>
fgrtgrthtyfgvb
</Details>
</QUERY>
";
$sxml = simplexml_load_string($resultXML);
echo json_encode($sxml);
?>
I get
{"Company":"fcsf","Details":"\n fgrtgrthtyfgvb\n "}
However, If I use CDATA in the Details element as follows:
<?php
header("Content-Type:text/json");
$resultXML = "
<QUERY>
<Company>fcsf</Company>
<Details><![CDATA[
fgrtgrthtyfgvb]]>
</Details>
</QUERY>
";
$sxml = simplexml_load_string($resultXML);
echo json_encode($sxml);
?>
I get the following
{"Company":"fcsf","Details":{}}
In this case the Details element is blank. Any idea why Details is blank and how to correct this?
This is not a problem with the JSON encoding – var_dump($sxml->Details) shows you that SimpleXML already messed it up before, as you will only get
object(SimpleXMLElement)#2 (0) {
}
– an “empty” SimpleXMLElement, the CDATA content is already missing there.
And after we figured that out, googling for “simplexml cdata” leads us straight to the first user comment on the manual page on SimpleXML Functions, that has the solution:
If you are having trouble accessing CDATA in your simplexml document, you don't need to str_replace/preg_replace the CDATA out before loading it with simplexml.
You can do this instead, and all your CDATA contents will be merged into the element contents as strings.
$xml = simplexml_load_file($xmlfile, 'SimpleXMLElement', LIBXML_NOCDATA);
So, use
$sxml = simplexml_load_string($resultXML, 'SimpleXMLElement', LIBXML_NOCDATA);
in your code, and you’ll get
{"Company":"fcsf","Details":"\n fgrtgrthtyfgvb\n "}
after JSON-encoding it.
I want to generate xml by using php simplexml.
$xml = new SimpleXMLElement('<xml/>');
$output = $xml->addChild('child1');
$output->addChild('child2', "value");
$output->addChild('noValue', '');
Header('Content-type: text/xml');
print($xml->asXML());
The output is
<xml>
<child1>
<child2>value</child2>
<noValue/>
</child1>
</xml>
What I want is if the tag has no value it should display like this
<noValue></noValue>
I've tried using LIBXML_NOEMPTYTAG from Turn OFF self-closing tags in SimpleXML for PHP?
I've tried $xml = new SimpleXMLElement('<xml/>', LIBXML_NOEMPTYTAG); and it doesn't work. So I don't know where to put the LIBXML_NOEMPTYTAG
LIBXML_NOEMPTYTAG does not work with simplexml, per the spec:
This option is currently just available in the DOMDocument::save and DOMDocument::saveXML functions.
To achieve what you're after, you need to convert the simplexml object to a DOMDocument object:
$xml = new SimpleXMLElement('<xml/>');
$child1 = $xml->addChild('child1');
$child1->addChild('child2', "value");
$child1->addChild('noValue', '');
$dom_sxe = dom_import_simplexml($xml); // Returns a DomElement object
$dom_output = new DOMDocument('1.0');
$dom_output->formatOutput = true;
$dom_sxe = $dom_output->importNode($dom_sxe, true);
$dom_sxe = $dom_output->appendChild($dom_sxe);
echo $dom_output->saveXML($dom_output, LIBXML_NOEMPTYTAG);
which returns:
<?xml version="1.0" encoding="UTF-8"?>
<xml>
<child1>
<child2>value</child2>
<noValue></noValue>
</child1>
</xml>
Something worth pointing out... the likely reason that the NOEMPTYTAG option is available for DOMDocument and not simplexml is that empty elements are not considered valid XML, while the DOM specification allows for them. You are banging your head against the wall to get invalid XML, which may suggest that the valid self-closing empty element would work just as well.
Despite the quite lengthy answers already given - which are not particularly wrong and do shed some light into some libxml library internals and it's PHP binding - you're most likely looking for:
$output->noValue = '';
To add an open tag, empty node-value and end tag (beautified, demo is here: http://3v4l.org/S2PKc):
<?xml version="1.0"?>
<xml>
<child1>
<child2>value</child2>
<noValue></noValue>
</child1>
</xml>
Just noting as it seems it has been overlooked with the existing answers.
Since Simple XML is proving troublesome, perhaps XMLWriter could do what you want.
Here's a fiddle
<?php
$oXMLWriter = new XMLWriter;
$oXMLWriter->openMemory();
$oXMLWriter->startDocument('1.0', 'UTF-8');
$oXMLWriter->startElement('xml');
$oXMLWriter->writeElement('child1', 'Hello world!!');
$oXMLWriter->writeElement('noValue', '');
$oXMLWriter->endElement();
$oXMLWriter->endDocument();
echo htmlentities($oXMLWriter->outputMemory(TRUE));
?>
Output:
<?xml version="1.0" encoding="UTF-8"?>
<xml>
<child1>Hello world!!</child1>
<noValue></noValue>
</xml>
Extending from my comments (some got deleted):
The behavior depends on your environment. This same code:
$xml = new SimpleXMLElement('<xml/>', LIBXML_NOEMPTYTAG);
$output = $xml->addChild('child1');
$output->addChild('child2', "value");
$output->addChild('noValue', '');
echo $xml->asXML();
In 3v4l.org and Ideone.com, it produces self-closing tag;
In eval.in, codepad.org and on my localhost (PHP 5.3/5.4, libXML 2.7, Windows), it produces empty tag.
Since according to PHP document, LIBXML_NOEMPTYTAG only (guarenteed to) work in DOM, you may want to try DOM for ensurance:
$dom=new DOMDocument("1.0","UTF-8");
$dom->formatOutput=true;
$root=$dom->createElement("xml");
$dom->appendChild($root);
$child1=$dom->createElement("child1");
$root->appendChild($child1);
$node=$dom->createElement("child2");
$node->appendChild($dom->createTextNode("value"));
$child1->appendChild($node);
$node=$dom->createElement("noValue");
$child1->appendChild($node);
echo $dom->saveXML($dom,LIBXML_NOEMPTYTAG);
3v4l.org demo.
Edit:
All the above online demo site uses Content-Type: text/plain by default. If you want to directly output XML to browser as a standalone resource, you can specify the header before output:
header("Content-Type: text/xml");
echo $dom->saveXML($dom,LIBXML_NOEMPTYTAG);
I had to get the child node and asign to the nodeValue property an empty string, and the xml close tag appears.
$output->childNodes[1]->nodeValue = '';
Greetings.
I've come across a weird but apparently valid XML string that I'm being returned by an API. I've been parsing XML with SimpleXML because it's really easy to pass it to a function and convert it into a handy array.
The following is parsed incorrectly by SimpleXML:
<?xml version="1.0" standalone="yes"?>
<Response>
<CustomsID>010912-1
<IsApproved>NO</IsApproved>
<ErrorMsg>Electronic refunds...</ErrorMsg>
</CustomsID>
</Response>
Simple XML results in:
SimpleXMLElement Object ( [CustomsID] => 010912-1 )
Is there a way to parse this in XML? Or another XML library that returns an object that reflects the XML structure?
That is an odd response with the text along with other nodes. If you manually traverse it (not as an array, but as an object) you should be able to get inside:
<?php
$xml = '<?xml version="1.0" standalone="yes"?>
<Response>
<CustomsID>010912-1
<IsApproved>NO</IsApproved>
<ErrorMsg>Electronic refunds...</ErrorMsg>
</CustomsID>
</Response>';
$sObj = new SimpleXMLElement( $xml );
var_dump( $sObj->CustomsID );
exit;
?>
Results in second object:
object(SimpleXMLElement)#2 (2) {
["IsApproved"]=>
string(2) "NO"
["ErrorMsg"]=>
string(21) "Electronic refunds..."
}
You already parse the XML with SimpleXML. I guess you want to parse it into a handy array which you not further define.
The problem with the XML you have is that it's structure is not very distinct. In case it does not change much, you can convert it into an array using a SimpleXMLIterator instead of a SimpleXMLElement:
$it = new SimpleXMLIterator($xml);
$mode = RecursiveIteratorIterator::SELF_FIRST;
$rit = new RecursiveIteratorIterator($it, $mode);
$array = array_map('trim', iterator_to_array($rit));
print_r($array);
For the XML-string in question this gives:
Array
(
[CustomsID] => 010912-1
[IsApproved] => NO
[ErrorMsg] => Electronic refunds...
)
See as well the online demo and How to parse and process HTML/XML with PHP?.
I was tesing with a simple example of how to display XML in browser using PHP and found this example which works good
<?php
$xml = new DOMDocument("1.0");
$root = $xml->createElement("data");
$xml->appendChild($root);
$id = $xml->createElement("id");
$idText = $xml->createTextNode('1');
$id->appendChild($idText);
$title = $xml->createElement("title");
$titleText = $xml->createTextNode('Valid');
$title->appendChild($titleText);
$book = $xml->createElement("book");
$book->appendChild($id);
$book->appendChild($title);
$root->appendChild($book);
$xml->formatOutput = true;
echo "<xmp>". $xml->saveXML() ."</xmp>";
$xml->save("mybooks.xml") or die("Error");
?>
It produces the following output:
<?xml version="1.0"?>
<data>
<book>
<id>1</id>
<title>Valid</title>
</book>
</data>
Now I have got two questions regarding how the output should look like.
The first line in the xml file '', should not be displayed, that is it should be hidden
How can I display the TextNode in the next line. In total I am exepecting an output in this fashion
<data>
<book>
<id>1</id>
<title>
Valid
</title>
</book>
</data>
Is that possible to get the desired output, if so how can I accomplish that.
Thanks
To skip the XML declaration you can use the result of saveXML on the root node:
$xml_content = $xml->saveXML($root);
file_put_contents("mybooks.xml", $xml_content) or die("cannot save XML");
Please note that saveXML(node) has a different output from saveXML().
First question:
here is my post where all usable threads with answers are listed: How do you exclude the XML prolog from output?
Second question:
I don't know of any PHP function that outputs text nodes like that.
You could:
read xml using DomDocument and save each node as string
iterate trough nodes
detect text nodes and add new lines to xml string manually
At the end you would have the same XML with text node values in new line:
<node>
some text data
</node>