data test1; RegEx_ID = PRXPARSE ('/(百度移动客服|今日头条\s?53|神马竞价\s?53|手机APP|自媒体|搜狗竞价留言)/'); set test; call prxsubstr(RegEx_ID,remarks,position,length); if position ^=0 then match=substr(remarks, position, length); run;