php中xml轉換json問題

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 string define ("EMPTY_STR", ""); // SimpleXMLElement object property name for attributes define ("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); 
 if ($simpleXmlElementObject == null) { return(EMPTY_STR); } 
 $jsonOutput = EMPTY_STR; 
 // Let us convert the XML structure into PHP array structure. $array1 = xml2json::convertSimpleXmlElementObjectIntoArray($simpleXmlElementObject); 
 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)) 
 return($jsonOutput); } // End of function transformXmlStringToJson

public static function convertSimpleXmlElementObjectIntoArray($simpleXmlElementObject, &$recursionDepth=0) { // Keep an eye on how deeply we are involved in recursion. 
 if ($recursionDepth > MAX_RECURSION_DEPTH_ALLOWED) { // Fatal error. Exit now. return(null); } 
 if ($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) { 
 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); } 
 // 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($copyOfsimpleXmlElementObject))); } 
 // Let us walk through the child elements now. foreach($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; } */ 
 // Let us recursively process the current element we just visited. // Increase the recursion depth by one. $recursionDepth++; $resultArray[$key] = xml2json::convertSimpleXmlElementObjectIntoArray($value, $recursionDepth); 
 // Decrease the recursion depth by one. $recursionDepth--; } // End of foreach($simpleXmlElementObject as $key=>$value) { 
 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()] = $tempArray; } 
 return ($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.

 // Filename from where XML contents are to be read. $testXmlFile = ""; 
 // Read the filename from the command line. if ($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 = $argv[1]; } 
 //Read the XML contents from the input file. file_exists($testXmlFile) or die('Could not find file ' . $testXmlFile); $xmlStringContents = file_get_contents($testXmlFile); 
 $jsonContents = ""; // Convert it to JSON now. // xml2json simply takes a String containing XML contents as input. $jsonContents = xml2json::transformXmlStringToJson($xmlStringContents); 
 echo("JSON formatted output generated by xml2json:\n\n"); echo($jsonContents); ?>

php -f xml2json_test.php test2.xml

    JackHerrington Manning  
   JackHerrington O'Reilly  
   JackHerrington O'Reilly  

{ "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" } ]} }