unable to insert records in database - php

Question

starting query to display result:
$at = array();
$num=array();
$i=0;
while($rw=mysql_fetch_array($r))
{
echo $rw['c_number']
$number=$rw['c_number'];
$num[$i]=$number;
$i++;
echo $rw['total'];
$at[] = $rw['total'];
}
// the result of this query is like:
Mobile numbers bills
03455919448 34
03215350700 56
03474738923 678
03573987932 344
03187438979 1324
// now want to insert it in database
$d= 'november';
foreach($num as $num1){
$sql = "insert into billing details(bill,month/year,c_number) values ('$at','$d','$num')";
mysql_error();
$result = mysql_query($sql);
}
// the insertion query at end is not working and gives me error:
MySQL returned an empty result set (i.e. zero rows). ( Query took 0.0004 sec )

Answer 1

I think you need to replace num with num1 like
$sql = "INSERT INTO `billing details`(bill,`month/year`,c_number) VALES ('$at','$d','$num1')";
And dont use mysql_* functions due to they are depricated,instead you use mysqli_* functions or PDO statements
AND put your table name in '`' it seems like two different names and for the column name month/year also

Answer 2

i dont know what exactly want to insert $num or $num1 ? and check your table name ,column names
$d= 'november';
int i=0; // you are saying that $at has all bills
foreach($num as $num1){
$sql = "insert into billing details(bill,month/year,c_number) values ('$at[i]','$d','$num1[mobile_number]')";
$result = mysql_query($sql);
if (mysql_error()) die('Error, insert query failed');
i++;
}