/**
 *  文章內容提取圖片(多張)自定義輸出
 *    網 
 * @access    public
 * @param     string  $string  文檔內容
 * @param     string  $num  輸出幾張
 * @return    string
 */
if(!function_exists('getBodypics'))
{
function getBodypics($string, $num)
{
global $cfg_basehost;
preg_match_all("/<img([^>]*)\s*src=('|\")([^'\"]+)('|\")/",$string,$matches);
$imgsrc_arr = array_unique($matches[3]);
$count = count($imgsrc_arr);
$i = 0;
$result = '';
foreach($imgsrc_arr as $imgsrc)
{
if($i == $num) break;
$result .= ($result=='' ? '"'.$cfg_basehost.$imgsrc.'"' : ','.'"'.$cfg_basehost.$imgsrc.'"');
$i++;
}
return $result;
}
}

<link rel="canonical" href="{dede:global.cfg_basehost/}{dede:field.id runphp=yes}$result=GetOneArchive(@me);@me=$result['arcurl'];{/dede:field.id}">
<script src="//msite.baidu.com/sdk/c.js?appid=1608633444348086"></script>
<script type="application/ld+json">
{
"@context": "https://ziyuan.baidu.com/contexts/cambrian.jsonld",
"@id": "{dede:global.cfg_basehost/}{dede:field.id runphp=yes}$result=GetOneArchive(@me);@me=$result['arcurl'];{/dede:field.id}",
"appid": "1608633444348086",
"title": "{dede:field.title/}",
"images": [{dede:field.body function=getBodypics(@me,3)/}],
"description": "{dede:field.description function=html2text(@me)/}",
"pubDate": "{dede:field.pubdate function="MyDate('Y-m-d\TH:i:s',@me)"/}"
}
</script>