Predefined Constants
Instead of using <?php eval($code) ?>
you can use this method,
<?php
$node = "node";
$XML = simplexml_load_file($file);
$text = (string)$XML->nodes->{$node}; // works
// or
$text2 = (string)$XML->{$node}->child; // also works fine
?>
I think it is much more easier instead of eval().
add a note
User Contributed NotesExamples
info at accountr dot eu
06-May-2009 12:35
06-May-2009 12:35
Edward Rudd
15-Nov-2008 01:46
15-Nov-2008 01:46
If you need to updated the content of a node selected via Xpath use [0]. Example.
<?php
$x = new SimpleXMLElement(<<<EOXML
<root>
<node>Some Text</node>
</root>
EOXML
);
$nodes = $x->xpath('/root/node');
// This does not work
// $nodes[0] = "My New Text";
$nodes[0][0] = "My New Text";
echo $x->asXML();
?>
Note that this for some reason doesn't work.
<?php
$node = $nodes[0];
$nodes[0] = "My New Text";
?>
It throw an exception "Object ($node) don't support array access operators"
Kari P.
15-Aug-2008 06:17
15-Aug-2008 06:17
To take care of proper error checking, one must use try-catch blocks:
<?php
try {
$sxe = new SimpleXMLElement($xmlstring);
} catch (Exception $e) {
echo "bad xml";
}
?>
To get rid of warnings, use @ in front of new:
<?php
try {
$sxe = @new SimpleXMLElement($xmlstring);
} catch (Exception $e) {
echo "bad xml";
}
?>
dipl dot paed dot thomas dot schaefer at web dot de
04-May-2008 01:57
04-May-2008 01:57
<?php
class QXML {
...
protected function _toXML(
$xmlArray,
$elmName='graph',
$elmCloseTag="",
$level=0)
{
$xmlString = "";
if(is_array($xmlArray)){
$strXmlAttributes = "";
$key_xml = "";
$keysXmlArray = array_keys($xmlArray);
$curLevel = $level + 1;
if(in_array(self::attribute,$keysXmlArray)){
if(isset($xmlArray[self::attribute])){
if(is_array($xmlArray[self::attribute])){
foreach($xmlArray[self::attribute]
as $xmlArrayKey => $xmlArrayValue)
{
$strXmlAttributes .= sprintf(' %s="%s"',
$xmlArrayKey,
addslashes($xmlArrayValue));
}
}
}
unset($xmlArray[self::attribute]);
}
if(in_array(self::textNode,$keysXmlArray)){
if(isset($xmlArray[self::textNode])){
if($xmlArray[self::textNode]){
$key_xml = $xmlArray[self::textNode];
}
if(strlen($ky_xml)){
$key_xml = sprintf("<![CDATA[%s]]>",$key_xml);
} else {
$key_xml = "";
}
}
unset($xmlArray[self::textNode]);
}
$keysXmlArray=array_keys($xmlArray);
if($elmCloseTag){
$indent=str_repeat(" ",$level * 5);
$xmlString .="\n".$indent.
"<".$elmCloseTag.$strXmlAttributes.">".
$key_xml;
}
if(is_array($xmlArray) && count($xmlArray)>0
&& count($keysXmlArray)>0)
{
reset($xmlArray);
foreach($keysXmlArray as $key){
$altKey = $altKeyXml = $xmlArray[$key];
$check = false;
foreach(array_keys($altKeyXml) as $j=>$p){
if(is_numeric($j)){
$check=true;
$xmlString.= $this->_toXML(
$altKeyXml[$j],
"",
$key,
$curLevel
);
unset($altKeyXml[$j]);
}
}
if($check){
$altKey = $altKeyXml;
}
if($altKey){
$xmlString .= $this->_toXML($altKey,"",$key,$curLevel);
}
}
}
if($elmCloseTag){
$xmlString.= (count($xmlArray)>0?"\n".$indent:"").
"</".$elmCloseTag.">";
}
}
if($elmName) {
$xmlString = "<?xml version='1.0' encoding='UTF-8'?>\n$xmlString\n";
}
return $xmlString;
}
...
}
?>
Honeymonster
30-Apr-2008 10:52
30-Apr-2008 10:52
@david b
@Fabi W
Why can't you use the ->{} operators?
e.g
$xml->{$node}
I've not tested this, but see no reason why it would not work.
Fabi W
24-Apr-2008 04:34
24-Apr-2008 04:34
@david b's approach of dynamically accessing xml-elements:
You can explode the dynamic var with '->' as seperator and thus build a simple function to get the element
function simplexml_get_node_by_query($sxml_obj, $query)
{
$nodes = explode("->", $query);
$currTree = $sxml_obj;
foreach($nodes as $node)
{
$currTree = $currTree->$node;
}
return $currTree;
}
mike at mike-griffiths dot co dot uk
19-Apr-2008 01:11
19-Apr-2008 01:11
It is important that you select the correct method of loading the XML in depending on the format of your XML file.
If you use the wrong function to load it in you will get some strange errors.
david b
13-Apr-2008 07:04
13-Apr-2008 07:04
Use eval() when using variable variables to access SimpleXML nodes.
e.g.
<?php
include 'example.php';
$xml = new SimpleXMLElement($xmlstr);
$s = 'movie[0]->plot' ;
echo "\n1: OK " . $xml->movie[0]->plot ; // OK
echo "\n2: FAIL " . $xml->$s ; // FAIL
echo "\n3: OK " . eval( "return \$xml->$s ;" ) ; // OK
?>