这是一个简单的方法，其实是两种方法的其中一种：xml2array 和 array2xml 中的一种啦。
但因为array2xml的时候，没有办法做到更好的把attributes做到更好，因此，就折腾了一些简单的处理方法：
array2xml是hightman的方法的简版。我自己改了一些：
function array2xml($var, $type = 'root', $tag = '') {
$ret = '';
if (!is_int($type)) {
if ($tag)
return array2xml(array($tag => $var), 0, $type); else {
$tag .= $type;
$type = 0;
}
}
$level = $type;
$indent = str_repeat("\t", $level);
if (!is_array($var)) {
$ret .= $indent . '<' . $tag;
$var = strval($var);
if ($var == '') {
$ret .= ' />';
} else if (!preg_match('/[^0-9a-zA-Z@\._:\/-]/', $var)) {
$ret .= '>' . $var . '</' . $tag . '>';
} else {
$ret .= "><![CDATA[{$var}]]></{$tag}>";
}
// if (strpos($var, "\n") === false){
// $ret .= '><![CDATA[' . $var . ']]></' . $tag . '>';
// } else
$ret .= "\n";
} else if (!(is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) && !emptyempty($var)) {
foreach ($var as $tmp)
$ret .= array2xml($tmp, $level, $tag);
} else {
$ret .= $indent . '<' . $tag;
if ($level == 0)
$ret .= '';
if (isset($var['@attributes'])) {
foreach ($var['@attributes'] as $k => $v) {
if (!is_array($v)) {
$ret .= sprintf(' %s="%s"', $k, $v);
}
}
unset($var['@attributes']);
}
$ret .= ">\n";
foreach ($var as $key => $val) {
$ret .= array2xml($val, $level + 1, $key);
}
$ret .= "{$indent}</{$tag}>\n";
}
return $ret;在其中强加了attributes。比较恶心的方法啦。。
然后xml2array，其实以前写过，但写的不太好，所以我这次抄的是ibm的网站上的xml2json中的代码：
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");
/**
* @static
* @param $simpleXmlElementObject
* @param int $recursionDepth
* @return array|null|string
*/
public static function xml2array($simpleXmlElementObject, $getAttributes = false , &$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)) {
// Initialize the result array.
$resultArray = array();
// Is the input array size 0? Then, we reached the rare CDATA text if any.
if (count($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 => $value) {
// When this block of code is commented, XML attributes will be
// added to the result array.
// Uncomment the following block of code if XML attributes are
// NOT required to be returned as part of the result array.
/*
if((is_string($key)) && ($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.
$recursionDepth++;
if($key == '@attributes' && $getAttributes == true){
foreach(self::xml2array($value,$getAttributes, $recursionDepth) as $k=>$v){
$resultArray[$k]=$v;
}
}else{
$resultArray[$key] = self::xml2array($value,$getAttributes, $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
}改过其中的几行代码，否则会报错，改了哪几行我忘了。。官网地址是：http://www.ibm.com/developerworks/xml/library/x-xml2jsonphp/
这里还有一个：http://www.zenme.org/?action=show&id=270,可以参考一下
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