require_once 'json/JSON.php';// Internal program-specific Debug option.define ("DEBUG", false);// Maximum Recursion Depth that we can allow.define ("MAX_RECURSION_DEPTH_ALLOWED", 25);// An empty stringdefine ("EMPTY_STR", "");// SimpleXMLElement object property name for attributesdefine ("SIMPLE_XML_ELEMENT_OBJECT_PROPERTY_FOR_ATTRIBUTES", "@attributes");// SimpleXMLElement object name.define ("SIMPLE_XML_ELEMENT_PHP_CLASS", "SimpleXMLElement");

public static function transformXmlStringToJson($xmlStringContents) { $simpleXmlElementObject = simplexml_load_string($xmlStringContents); <br>if ($simpleXmlElementObject == null) { return(EMPTY_STR); }<br>$jsonOutput = EMPTY_STR; <br>// Let us convert the XML structure into PHP array structure. $array1 = xml2json::convertSimpleXmlElementObjectIntoArray($simpleXmlElementObject);<br>if (($array1 != null) && (sizeof($array1) > 0)) {// Create a new instance of Services_JSON $json = new Services_JSON(); // Let us now convert it to JSON formatted data. $jsonOutput = $json->encode($array1); } // End of if (($array1 != null) && (sizeof($array1) > 0))<br>return($jsonOutput); } // End of function transformXmlStringToJson

public static function convertSimpleXmlElementObjectIntoArray($simpleXmlElementObject,&$recursionDepth=0) { // Keep an eye on how deeply we are involved in recursion.<br>if ($recursionDepth > MAX_RECURSION_DEPTH_ALLOWED) { // Fatal error. Exit now. return(null); }<br>if ($recursionDepth == 0) { if (get_class($simpleXmlElementObject) != SIMPLE_XML_ELEMENT_PHP_CLASS) { // If the external caller doesn't call this function initially // with a SimpleXMLElement object, return now. return(null); } else { // Store the original SimpleXmlElementObject sent by the caller. // We will need it at the very end when we return from here for good. $callerProvidedSimpleXmlElementObject = $simpleXmlElementObject; } } // End of if ($recursionDepth == 0) {<br>if (get_class($simpleXmlElementObject) == SIMPLE_XML_ELEMENT_PHP_CLASS) {// Get a copy of the simpleXmlElementObject$copyOfsimpleXmlElementObject = $simpleXmlElementObject;// Get the object variables in the SimpleXmlElement object for us to iterate.$simpleXmlElementObject = get_object_vars($simpleXmlElementObject);}<br>// It needs to be an array of object variables.if (is_array($simpleXmlElementObject)) {// Is the array size 0? Then, we reached the rare CDATA text if any.if (count($simpleXmlElementObject) <= 0) {// Let us return the lonely CDATA. It could even be// an empty element or just filled with whitespaces.return (trim(strval($copyOfsimpleXmlElementObject)));}<br>// Let us walk through the child elements now.foreach($simpleXmlElementObject as $key=>$value) {// When this block of code is commented, XML attributes will be// added to the result array.// Uncomment the following block of code if XML attributes are// NOT required to be returned as part of the result array./*if($key == SIMPLE_XML_ELEMENT_OBJECT_PROPERTY_FOR_ATTRIBUTES) {continue;}*/<br>// Let us recursively process the current element we just visited.// Increase the recursion depth by one.$recursionDepth++;$resultArray[$key] =xml2json::convertSimpleXmlElementObjectIntoArray($value, $recursionDepth);<br>// Decrease the recursion depth by one.$recursionDepth--;} // End of foreach($simpleXmlElementObject as $key=>$value) {<br>if ($recursionDepth == 0) {// That is it. We are heading to the exit now.// Set the XML root element name as the root [top-level] key of// the associative array that we are going to return to the caller of this// recursive function.$tempArray = $resultArray;$resultArray = array();$resultArray[$callerProvidedSimpleXmlElementObject->getName()] = $tempArray;}<br>return ($resultArray);} else {// We are now looking at either the XML attribute text or// the text between the XML tags.return (trim(strval($simpleXmlElementObject)));} // End of else} // End of function convertSimpleXmlElementObjectIntoArray.

<?phprequire_once("xml2json.php");<br>// Filename from where XML contents are to be read.$testXmlFile = "";<br>// Read the filename from the command line.if ($argc <= 1) {print("Please provide the XML filename as a command-line argument:\n");print("\tphp -f xml2json_test.php test1.xml\n");return;} else {$testXmlFile = $argv[1];}<br>//Read the XML contents from the input file.file_exists($testXmlFile) or die('Could not find file ' . $testXmlFile);$xmlStringContents = file_get_contents($testXmlFile);<br>$jsonContents = "";// Convert it to JSON now.// xml2json simply takes a String containing XML contents as input.$jsonContents = xml2json::transformXmlStringToJson($xmlStringContents);<br>echo("JSON formatted output generated by xml2json:\n\n");echo($jsonContents);?>

php -f xml2json_test.php test2.xml

<?xml version="1.0" encoding="UTF-8"?><books><book id="1"><title>Code Generation in Action</title><author><first>Jack</first><last>Herrington</last></author><publisher>Manning</publisher></book><br><book id="2"><title>PHP Hacks</title><author><first>Jack</first><last>Herrington</last></author><publisher>O'Reilly</publisher></book><br><book id="3"><title>Podcasting Hacks</title><author><first>Jack</first><last>Herrington</last></author><publisher>O'Reilly</publisher></book></books>

{ "books" : { "book" : [ { "@attributes" : { "id" : "1" },"title" : "Code Generation in Action","author" : { "first" : "Jack", "last" : "Herrington" },"publisher" : "Manning" }, { "@attributes" : { "id" : "2" },"title" : "PHP Hacks", "author" : { "first" : "Jack", "last" : "Herrington" },"publisher" : "O'Reilly" }, { "@attributes" : { "id" : "3" },"title" : "Podcasting Hacks", "author" : { "first" : "Jack", "last" : "Herrington" },"publisher" : "O'Reilly" } ]}}