Xml.php
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<?php
/**
*返回码定义
*/
/* 扩展内部错误 */
define("INTERNAL_ERR", -1);
/* 当前模式下不允许执行该函数 */
define("WRONG_MODE", 0);
/* 成功 */
define("SUCESS", 1);
/**
* 模式定义
*/
define("READMODE", 0);
define("WRITEMODE", 1);
/**
* @desc LtXml用于解析和生成XML文件
* 使用前调用 init() 方法对类进行初始化
*
* LtXml提供两个公共方法 getArray() 和 getString
*
* getArray() 方法要求传入一个规范的xml字符串,
* 返回一个格式化的数组
*
* getString() 方法要求传入一个格式化的数组,反
* 回一个规范的xml字符串
* 在使用getString() 方法时,传入的格式化数组可
* 通过 createTag() 方法获得。
*
*/
class LtXml {
/**
* 只支持 ISO-8859-1, UTF-8 和 US-ASCII三种编码
*/
private $_supportedEncoding = array("ISO-8859-1", "UTF-8", "US-ASCII");
/**
* XMLParser 操作句柄
*/
private $_handler;
/**
* READMODE 0:读模式,encoding参数不生效,通过输入的string获取version和encoding(getString方法不可用)
* WRITEMODE 1:写模式,按照制定的encoding和array生成string(getArray方法不可用)
*/
public $mode;
/**
* 该 XML 对象的编码,ISO-8859-1, UTF-8(默认) 或 US-ASCII
*/
public $encoding;
/**
* 该 XML 对象的版本,1.0(默认)
*/
public $version;
public function init($mode = 0, $encoding = "UTF-8", $version = "1.0") {
$this->mode = $mode;
$this->encoding = $encoding;
$this->version = $version;
$this->_getParser($encoding);
}
public function getArray($xmlString) {
if (READMODE !== $this->mode) {
trigger_error("LtXml is on WRITEMODE, and cannot convert XML string to array.");
return WRONG_MODE;
}
if (0 === preg_match("/version=[\"|\']([1-9]\d*\.\d*)[\"|\']/", $xmlString, $res)) {
trigger_error("Cannot find the version in this XML document.");
return INTERNAL_ERR;
}
else {
$this->version = $res[1];
}
if (0 === preg_match("/encoding=[\"|\'](.*?)[\"|\']/", $xmlString, $res)) {
$this->encoding = "UTF-8";
}
else {
$this->encoding = strtoupper($res[1]);
}
$_array = $this->_stringToArray($xmlString);
if (NULL === $_array) {
trigger_error("Fail to get the tag template.");
return INTERNAL_ERR;
}
$currentArray = NULL;
$openingTags = array();
$array = $this->_getArrayTemplate();
foreach ($_array as $tag) {
$tag["tag"] = strtolower($tag["tag"]);
if (isset($tag["type"]) && "close" == $tag["type"]
&& isset($tag["tag"]) && ! empty($tag["tag"])) {
if ($openingTags[count($openingTags) - 1]["tag"] == $tag["tag"]) {
unset($openingTags[count($openingTags) - 1]);
}
else {
return -1;
}
}
else if ((isset($tag["type"]) && "complete" == $tag["type"])
|| (isset($tag["type"]) && "open" == $tag["type"])
&& isset($tag["tag"]) && ! empty($tag["tag"])){
$currentArray = $this->_getArrayTemplate();
$currentArray["tag"] = $tag["tag"];
$cdata = $tag["value"];
$cdata = preg_replace("/^\s*/", "", $cdata);
$cdata = preg_replace("/\s*$/", "", $cdata);
$currentArray["cdata"] = $cdata;
if (isset($tag["attributes"]) && is_array($tag["attributes"])) {
foreach($tag["attributes"] as $k => $v) {
$currentArray["attributes"][strtolower($k)] = $v;
}
}
if (0 == count($openingTags)) {
$openingTags[] = &$array;
$openingTags[0] = $currentArray;
}
else {
$subCount = count($openingTags[count($openingTags) - 1]["sub"]);
$openingTags[count($openingTags) - 1]["sub"][$subCount] = $currentArray;
$openingTags[count($openingTags)] = &$openingTags[count($openingTags) - 1]["sub"][$subCount];
}
if ("complete" == $tag["type"]) {
unset($openingTags[count($openingTags) - 1]);
}
}
else if (isset($tag["type"]) && "cdata" == $tag["type"]
&& isset($tag["tag"]) && ! empty($tag["tag"])) {
if ($tag["tag"] == $openingTags[count($openingTags) - 1]["tag"]) {
$cdata = $tag["value"];
$cdata = preg_replace("/^\s*/", "", $cdata);
$cdata = preg_replace("/\s*$/", "", $cdata);
$openingTags[count($openingTags) - 1]["cdata"] .= $cdata;
}
else {
return -2;
}
}
}
if (0 < count($openingTags)) {
return -3;
}
return $array;
}
public function getString($xmlArray) {
if (WRITEMODE !== $this->mode) {
trigger_error("LtXml is on READMODE, and cannot convert array to string.");
return WRONG_MODE;
}
$header = "<?xml version=\"{$this->version}\" encoding=\"{$this->encoding}\"". " ?" . ">\n";
$xmlString = $header;
$processingTags = array($xmlArray);
while (! empty($processingTags)) {
if (! isset($processingTags[count($processingTags) -1]["close"])) {
$tagArray = $processingTags[count($processingTags) - 1];
if (0 === $this->_isTag($tagArray)) {
trigger_error("The array do not match the format.");
return INTERNAL_ERR;
}
$processingTags[count($processingTags) -1]["close"] = "YES";
$tagName = $tagArray["tag"];
$tag = "<{$tagName}";
foreach ($tagArray["attributes"] as $key => $value) {
$tag .= " {$key}=\"{$value}\"";
}
if (! empty($tagArray["sub"]) || ! empty($tagArray["cdata"])) {
$cdata = $this->_convertEntity($tagArray["cdata"]);
$tag .= ">\n{$cdata}\n";
for ($i=count($tagArray["sub"]) - 1; $i>=0; $i--) {
$subArray = $tagArray["sub"][$i];
$processingTags[count($processingTags)] = $subArray;
}
}
else {
$processingTags[count($processingTags) - 1]["complete"] = "YES";
}
}
else {
$tag = (isset($processingTags[count($processingTags) - 1]["complete"]))
? "/>\n"
: "</{$processingTags[count($processingTags) - 1]["tag"]}>\n";
unset($processingTags[count($processingTags) - 1]);
}
$xmlString .= $tag;
}
$xmlString = preg_replace("/\n\s*/", "\n", $xmlString);
return $xmlString;
}
/**
* 生成一个xml节点
* @param string tag 标签名
* @param string cdata 数据
* @param array attr 属性列表
* @param array sub 子标签列表
*/
public function createTag($tag, $cdata = "", $attr = array(), $sub = array()) {
$newTag = $this->_getArrayTemplate();
if (! is_string($tag)) {
trigger_error("Cannot read the tag name.");
return INTERNAL_ERR;
}
$newTag["tag"] = $tag;
$newTag["cdata"] = $cdata;
$newTag["attributes"] = $attr;
$newTag["sub"] = $sub;
return $newTag;
}
/**
* 释放xml_parser
*/
public function free() {
xml_parser_free($this->_handler);
}
private function _getParser($encoding) {
if (in_array($encoding, $this->_supportedEncoding))
$this->_handler = xml_parser_create($encoding);
else
$this->_handler = NULL;
}
private function _stringToArray($xmlString) {
$res = xml_parse_into_struct($this->_handler, $xmlString, $array);
if (1 === $res)
return $array;
else
return NULL;
}
private function _convertEntity($string) {
$patterns = array("/</", "/</", "/&/", "/'/", "/\"/");
$replacement = array("<", ">", "&", "'", """);
return preg_replace($patterns, $replacement, $string);
}
private function _rConvertEntity($string) {
$patterns = array("/</", "/>/", "/&/", "/'/", "/"/");
$replacement = array("<", "<", "&", "'", "\"");
return preg_replace($patterns, $replacement, $string);
}
private function _getArrayTemplate() {
return array("tag" => "", "attributes" => array(), "sub" => array(), "cdata" => "");
}
/**
* 检测传入的参数是否是一个合法的tag数组
* @return 0 非法
* @return 1 合法
*/
private function _isTag($tag) {
if (! is_array($tag)) {
return 0;
}
if (! isset($tag["tag"]) || ! is_string($tag["tag"]) || empty($tag["tag"])) {
return 0;
}
if (! isset($tag["attributes"]) || ! is_array($tag["attributes"])) {
return 0;
}
if (! isset($tag["sub"]) || ! is_array($tag["sub"])) {
return 0;
}
if (! isset($tag["cdata"]) || ! is_string($tag["cdata"])) {
return 0;
}
return 1;
}
}