PHP xml数据的创建与读取

<?php
/*
 * 1. 创建xml数据并写入xml文件
 * 2. 读取xml文件为数组
 * 写入的数据只能是“一维数组”，如果是多维，请转为1为数组
 */

$XML = new XML();

$dataArr = [
    'id'      => 1,
    'name'    => 'test',
    'key'     => 'this is key',
    'content' => 'this is content'
];

//创建xml文件
$xml_data = $XML->xmlData($dataArr);

//根据xml文件读取xml数据为数组
$getXmlData = $XML->xml_data_load();
var_dump($getXmlData);

class XML
{

    const FILEDIR = __DIR__.DIRECTORY_SEPARATOR."test.xml";

    /**
     * @param $dataArr  数组数据
     * @param $is_file  是否创建xml文件
     *
     * @return void
     */
    public function xmlData($dataArr = [], $is_file = true)
    {
        $xml = new SimpleXMLExtended('<?xml version="1.0" encoding="UTF-8"?><item></item>');
        $xml->addChild('pubDate', date('Y-m-d H:i:s'));

        foreach ($dataArr as $key => $v) {
            $note = $xml->addChild($key);
            $note->addCData($v);
        }
        $data = @$xml->asXML();
        $xml  = $this->formatXmlString($data);
        if ($is_file) {
            $status = $this->XMLsave($xml, self::FILEDIR);
            if ($status) {
                print_r("创建成功<br>");
            } else {
                print_r("创失败啦<br>");
            }
        } else {
            var_dump($xml);
        }

    }

    /**
     * 保存为xml文件
     *
     * @param $xml
     *
     * @return bool
     */
    private function XMLsave($xml)
    {
        $data    = $this->exec_filter('xmlsave', $xml);
        $success = file_put_contents(self::FILEDIR, $data); // LOCK_EX ?

        return $success && chmod(self::FILEDIR, 0755);
    }

    /**
     * 根据xml文件，解析xml数据为数组
     * @return array|mixed|stdClass|void
     */
    public function xml_data_load()
    {
        $file = self::FILEDIR;
        if (file_exists($file)) {
            $data      = $this->getXML($file);
            $xml_json  = json_encode($data);//转换为json数据
            $xml_array = json_decode($xml_json, true);//转换成数组

            return $xml_array;
        }

    }

    /**
     * 删除xml文件
     *
     * @param $id
     *
     * @return true
     */
    public function delete_file($file)
    {
        $filepath = GSDATAPAGESPATH;
        if ($this->filepath_is_safe($file, $filepath)) {
            unlink($file);
        }

        return true;
    }

    function formatXmlString($data)
    {
        if (gettype($data) === 'object') {
            $data = $data->asXML();
        }
        $dom                     = new DOMDocument('1.0');
        $dom->preserveWhiteSpace = false;
        $dom->formatOutput       = true;
        $dom->loadXML($data);

        $ret = $dom->saveXML();

        return $ret;
    }

    function getXML($file)
    {
        $xml = @file_get_contents($file);
        if ($xml) {
            $data = simplexml_load_string($xml, 'SimpleXMLExtended', LIBXML_NOCDATA);

            return $data;
        }
    }

    function exec_filter($script, $data = [])
    {
        return $data;
    }

    function filepath_is_safe($path, $pathmatch, $subdir = true)
    {
        $realpath      = realpath($path);
        $realpathmatch = realpath($pathmatch);
        if ($subdir) {
            return strpos(dirname($realpath), $realpathmatch) === 0;
        }

        return dirname($realpath) == $realpathmatch;
    }
}

class SimpleXMLExtended extends SimpleXMLElement
{

    public function addCData($cdata_text)
    {
        $node = dom_import_simplexml($this);
        $no   = $node->ownerDocument;
        $node->appendChild($no->createCDATASection($cdata_text));
    }
}