RREERREEinclude("connect/connect.php");RREERREEERREERREEERREEERREEERREEERREEERREEERREEERREEERREEERREEERREERREEERRREERREEERREERREEERREEERREEERREEERREEERREEERREEERREEERREEERREEERREEERREEE$xh=$_GET['xh'];RREEERREEERREEERREEERREEERREEERREEE$sql="select xh,xm,xb,zymc from xsjbxxb where xh=".$xh;/lect host,user from userRREEE$result=mysqli_query($conn,$sql);RREEERREEERREEERREEERREERREEEREERREEERREEERREERREEERREEERREEERREEERREEES
xh 필드가 기본 키인가요?