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