$re = '/<div class="con news_content">(.*?)<\/div>/s';
$str = 'body = """234234<div class="con news_content">解决什么问题?解决人的æ€è€ƒï¼Ÿè¿˜æ˜¯è§£å†³äººçš„预测
还是解决现象?人工智能它的机ç†æ˜¯ä»€ä¹ˆï¼Œç®€å•æ¥è®²è‡³å°‘大数æ®å¯ä»¥åœ¨äººå·¥æ™ºèƒ½åšé¢„测决ç–的范畴起到促进作用。</p>
<p class="copyright"</p>
</div></div>34234"""';
preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0);
// Print the entire match result
var_dump($matches);
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php