提交表单用insert into插入数据，但总是空白，没提示出错。请问那里有问题了？
@header(content-type: text/html; charset=utf-8);
require_once 'inc/site_config.php';
require_once 'inc/db_connections.php';
require_once 'inc/function.php';
mysql_query('set character set utf8');
session_start();
if($_request['action']=='postreg'){
$sql_check_usr=select * from `reguser` where `userid`='.$_session['uid'].';
$info=mysql_query($sql_check_usr);
$dingdanhao=date(ymjhis).$info[userid];
$spc=$_session[producelist];
$slc= $_session[quatity];
$shouhuoren=$_post['trusername'];
$dizhi=$_post['address'];
$youbian=$_post['phone'];
$tel=$_post['mob'];
$email=$_post['email'];
if(trim($_post['d_content'])==){
$leaveword=;
}
else{
$leaveword=$_post['d_content'];
}
$xiadanren=$_session['uid'];
$time=date(y-m-j h:i:s);
$total=$_session[total];
$sql_add_usr=insert into onlineorder (dingdanhao,spc,slc,username,address,phone,mobile,mail,yqinfo,ordertime,userid,total_price) values ('$dingdanhao','$spc','$slc','$trusername','$address','$phone','$mob','$email','$d_content','$time','$xiadanren','$total');
mysql_query($sql_add_usr);
}
php insert
------解决方案--------------------
把sql语句打印出来，然后到phpmyadmin等工具中运行sql语句看看结果如何。
这个是常用的检查sql正确性方法。
------解决方案--------------------
$info=mysql_query($sql_check_usr);
$dingdanhao=date(ymjhis).$info[userid];
$info 是个结果资源集，$info[userid] 这样用不对
mysql_query($sql_add_usr) or die(mysql_error()); //这样看看是否报错