wordpress to blogger 转换代码，基于php,将wordpress后台导出的xml数据,转换成blogger可直接导入的格式。

<?php
/**
 * WordPress to Blogger Converter (Final Fix for Import Overwrite)
 * 修复重点：生成纯数字 ID，防止 Blogger 导入时因 ID 格式错误而覆盖文章
 */
$inputFile = 'wordpress.xml'; // 你的源文件
$outputPrefix = 'blogger_final_'; 
$postsPerFile = 50; 
if (!file_exists($inputFile)) {
    die("错误: 找不到输入文件 '{$inputFile}'。\n");
}
echo "正在读取 WordPress 文件...\n";
libxml_use_internal_errors(true);
$wpXml = simplexml_load_file($inputFile);
if ($wpXml === false) {
    die("错误: 无法解析 XML 文件。\n");
}
// 获取命名空间
$ns = $wpXml->getNamespaces(true);
// 补全可能缺失的命名空间
if (!isset($ns['wp'])) $ns['wp'] = 'http://wordpress.org/export/1.2/';
if (!isset($ns['content'])) $ns['content'] = 'http://purl.org/rss/1.0/modules/content/';
if (!isset($ns['dc'])) $ns['dc'] = 'http://purl.org/dc/elements/1.1/';
$items = [];
// 1. 提取有效文章
if (isset($wpXml->channel->item)) {
    foreach ($wpXml->channel->item as $item) {
        $wpData = $item->children($ns['wp']);
        $postType = (string)$wpData->post_type;
        $status = (string)$wpData->status;
        if (!in_array($postType, ['post', 'page'])) continue;
        if ($status === 'trash' || $status === 'auto-draft') continue;
        $items[] = $item;
    }
}
$totalPosts = count($items);
echo "共找到 {$totalPosts} 篇有效文章。\n";
// 2. 分批处理
$fileIndex = 1;
$chunkedItems = array_chunk($items, $postsPerFile);
// 基准时间戳，用于生成唯一的纯数字 ID
$baseId = time(); 
$globalCounter = 0; 
foreach ($chunkedItems as $chunk) {
    $dom = new DOMDocument('1.0', 'UTF-8');
    $dom->formatOutput = true;
    // 创建根节点，并添加完整的 Google/Blogger 命名空间
    $feed = $dom->createElementNS('http://www.w3.org/2005/Atom', 'feed');
    $feed->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:app', 'http://purl.org/atom/app#');
    $feed->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:gd', 'http://schemas.google.com/g/2005'); // 关键：添加 gd 命名空间
    $dom->appendChild($feed);
    $generator = $dom->createElement('generator', 'Blogger');
    $generator->setAttribute('version', '7.00');
    $feed->appendChild($generator);
    
    $feed->appendChild($dom->createElement('updated', date('Y-m-d\TH:i:s\+00:00')));
    foreach ($chunk as $item) {
        $globalCounter++; 
        $wpData = $item->children($ns['wp']);
        $contentData = $item->children($ns['content']);
        $dcData = $item->children($ns['dc']);
        
        $postType = (string)$wpData->post_type;
        $status = (string)$wpData->status;
        $postDate = (string)$wpData->post_date;
        $entry = $dom->createElement('entry');
        // ========================================================
        // [核心修复] 生成纯数字 ID
        // ========================================================
        // 格式：tag:blogger.com,1999:blog-1.post-[纯数字]
        // 我们使用 (基准时间 + 计数器) 确保它是唯一的整数
        // 例如：17172345671, 17172345672...
        $pureNumericId = $baseId . sprintf('%04d', $globalCounter);
        
        // 注意这里 blog-1 是个虚拟的 Blog ID，只要 post- 后面的数字唯一即可
        $idUri = 'tag:blogger.com,1999:blog-1.post-' . $pureNumericId;
        
        $entry->appendChild($dom->createElement('id', $idUri));
        // ========================================================
        // 标题
        $title = (string)$item->title;
        $titleNode = $dom->createElement('title');
        $titleNode->setAttribute('type', 'html');
        if (trim($title) === '') { $title = "Untitled"; }
        $titleNode->appendChild($dom->createTextNode($title));
        $entry->appendChild($titleNode);
        // 内容
        $content = (string)$contentData->encoded;
        if (!empty($content)) {
            $content = nl2br($content); 
        }
        $contentNode = $dom->createElement('content');
        $contentNode->setAttribute('type', 'html');
        $contentNode->appendChild($dom->createCDATASection($content));
        $entry->appendChild($contentNode);
        // 时间
        try {
            $dateTime = new DateTime($postDate);
            $isoDate = $dateTime->format('Y-m-d\TH:i:s\+00:00');
        } catch (Exception $e) {
            $isoDate = date('Y-m-d\TH:i:s\+00:00');
        }
        $entry->appendChild($dom->createElement('published', $isoDate));
        $entry->appendChild($dom->createElement('updated', $isoDate));
        // 分类定义 (Page vs Post)
        $typeCategory = $dom->createElement('category');
        $typeCategory->setAttribute('scheme', 'http://schemas.google.com/g/2005#kind');
        if ($postType === 'page') {
            $typeCategory->setAttribute('term', 'http://schemas.google.com/blogger/2008/kind#page');
        } else {
            $typeCategory->setAttribute('term', 'http://schemas.google.com/blogger/2008/kind#post');
        }
        $entry->appendChild($typeCategory);
        // 标签/分类
        if (isset($item->category)) {
            foreach ($item->category as $cat) {
                $catName = (string)$cat;
                if ($catName !== 'Uncategorized' && trim($catName) !== '') {
                    $tagNode = $dom->createElement('category');
                    $tagNode->setAttribute('scheme', 'http://www.blogger.com/atom/ns#');
                    $tagNode->setAttribute('term', $catName);
                    $entry->appendChild($tagNode);
                }
            }
        }
        // 作者
        $authorNode = $dom->createElement('author');
        $creator = (string)$dcData->creator;
        $nameNode = $dom->createElement('name', $creator ? $creator : 'Admin');
        $authorNode->appendChild($nameNode);
        $entry->appendChild($authorNode);
        // 草稿状态
        if ($status !== 'publish') {
            $control = $dom->createElementNS('http://purl.org/atom/app#', 'app:control');
            $draft = $dom->createElementNS('http://purl.org/atom/app#', 'app:draft', 'yes');
            $control->appendChild($draft);
            $entry->appendChild($control);
        }
        $feed->appendChild($entry);
    }
    $filename = $outputPrefix . $fileIndex . '.xml';
    $dom->save($filename);
    echo "已生成文件: {$filename} (包含 " . count($chunk) . " 篇文章)\n";
    $fileIndex++;
}
echo "全部完成！请尝试删除 Blogger 中已导入的错误文章，然后重新导入新文件。\n";
?>