Convert array to XML format in PHP_PHP tutorial
最近公司要做一个API接口，输出格式要有JSON与XML格式， 在PHP中，输入JSON直接json_encode就可以，但输出XML没有提供函数，于是决定自己写一个。
<?php
/**
* 数组转XML类库
*
* @filesource ArrayToXML.php
* @author gentwolf
* @version 1.0 2013/08/23
*
* 使用说明：
* echo ArrayToXml::parse($array, 'root');
*/
class ArrayToXML {
//文档对象
private static $doc = NULL;
//版本号
private static $version = '1.0';
/**
* 初始化文档版本及编码
*
* @param string $version 版本号
* @param string $encoding XML编码
*/
public static function init($version, $encoding) {
self::$doc = new DomDocument($version, $encoding);
self::$doc->formatOutput = true;
}
/**
* 转换数组到XML
*
* @param array $array 要转换的数组
* @param string $rootName 要节点名称
* @param string $version 版本号
* @param string $encoding XML编码
*
* @return string
*/
public static function parse($array, $rootName = 'root', $version = '1.0', $encoding = 'UTF-8') {
self::init($version, $encoding);
//转换
$node = self::convert($array, $rootName);
self::$doc->appendChild($node);
return self::$doc->saveXML();
}
/**
* 递归转换
*
* @param array $array 数组
* @param string $nodeName 节点名称
*
* @return object (DOMElement)
*/
private static function convert($array, $nodeName) {
if (!is_array($array)) return false;
//创建父节点
$node = self::createNode($nodeName);
//循环数组
foreach ($array as $key => $value) {
$element = self::createNode($key);
//如果不是数组，则创建节点的值
if (!is_array($value)) {
$element->appendChild(self::createValue($value));
$node->appendChild($element);
} else {
//如果是数组，则递归
$node->appendChild(self::convert($value, $key, $element));
}
}
return $node;
}
private static function createNode($name) {
$node = NULL;
//如果是字符串，则创建节点
if (!is_numeric($name)) {
$node = self::$doc->createElement($name);
} else {
//如果是数字，则创建默认item节点
$node = self::$doc->createElement('item');
}
return $node;
}
/**
* 创建文本节点
*
* @param string || bool || integer $value
*
* @return object (DOMText || DOMCDATASection );
*/
private static function createValue($value) {
$textNode = NULL;
//如果是bool型，则转换为字符串
if (true === $value || false === $value) {
$textNode = self::$doc->createTextNode($value ? 'true' : 'false');
} else {
//如果含有HTML标签，则创建CDATA节点
if (strpos($value, '<') > -1) {
$textNode = self::$doc->createCDATASection($value);
} else {
$textNode = self::$doc->createTextNode($value);
}
}
return $textNode;
}
}
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