哪个老哥能帮忙写一句代码,如果txopenid=txopenid且openid不等于openid那么更新openid
 $D = db('');                    $user = $D ->setbiao('user')-> where( array( "txopenid" => $txopenid ) ) -> find();


                    if (is_array($user)) {                    $_SESSION['uid'] = $user['uid'];                    $key = md5('wuwei'.$_SESSION['uid']);

                  $data = ['uidw'=>$_SESSION['uid'],'key'=>$key];                    $sHtml = "<form id='alipaysubmit' name='alipaysubmit' action='".$_SESSION['backurl']."' method='post'>";                    while ( list ( $key, $val ) = each ( $data ) ) {                        $sHtml.= "<input type='hidden' name='".$key."' value='".$val."'/>";                    }                    $sHtml = $sHtml."<input type='submit' style='display:none'></form>";                    $sHtml = $sHtml."<script>document.forms['alipaysubmit'].submit();</script>";                    echo  $sHtml;
exit();