1 个正则表达式怎么够。。。
根据左侧 srcid 分成 3 大分类，我用了 6 个正则表达式判断。

preg_match_all("/(?<=<div class\=\"result c\-container\" id\=\")(\d{1,2})(\" srcid\=\")(\d{1,5})(?=\"  tpl\=\")/", $baiduserp, $matchsrcid)

preg_match_all("/(?<=<div class\=\"result\-op c\-container result\-zxl\"  srcid\=\")(\d{1,5})(\"  fk=\")(\d{0,5})(_?)([\.\d\w]+)(\" id\=\"zxl_)(\d{1,2})(?=\" tpl=\")/", $baiduserp, $matchzxl)

preg_match_all("/(?<=\"  srcid\=\")(\d{1,5})(\"  fk=\")(\d{0,5})(_?)(.+)(\" id\=\")(\d{1,2})(?=\" tpl\=\")/", $baiduserp, $matchfk)

preg_match("/(?<=\"  srcid=\")(\d{1,5})(\" fk=\"\"  id=\")(\d{1,2})(?=\" )/", $baiduserp, $matchAPP)

preg_match_all("/(?<=\"  srcid\=\")(\d{1,5})(.+)(id\=\"zxl_)(\d{1,2})(?=\" tpl\=\")/", $baiduserp, $matchzxlrt)

preg_match_all("/(?<=\"  srcid\=\")(\d{1,5})(\"  id\=\")(\d{1,2})(?=\" tpl\=\")/", $baiduserp, $matchsp)


这个不用正则那么麻烦，且效率不高。
直接使用dom解析方式获取更方便准确

jquery 可以，无需正则表达式