How to Import Excel Data To MySQL Using PHP

Question

Can anyone tell me:

I have to upload the excel file and put all its data in database, but the condition is that if any of the records are existing already in the database i have to fire an update query. else fire an insert query for new records.

I am comparing the Roll No from database with Roll No from excel . It works fine with the existing data ie It Updates all the existing . But it is not inserting the new data. Please check the code from :else if($num_rows>0)

Please Help Me.

Below is the code:

if($_FILES['excelFile']['name']!="")
{
    $fileName=uploadFile($_FILES['excelFile'],array(".xls",".xlsx"),"excel_file");
    $data = new Spreadsheet_Excel_Reader();
    $data->read('excel_file/'.$fileName);
    $ans=mysql_query("SELECT * FROM StudentData");
    $num_rows = mysql_num_rows($ans);
    for($i=1;$i<=$data->sheets[0]['numRows'];$i++)
    {
        $rollno=$data->sheets[0]['cells'][$i][1];
        $firstname=$data->sheets[0]['cells'][$i][2];
        $lastname=$data->sheets[0]['cells'][$i][3];
        $mobile=$data->sheets[0]['cells'][$i][4];
        $city=$data->sheets[0]['cells'][$i][5];

        if($num_rows<=0)
        {
            echo('Inserting : '.$rollno);
            $query="INSERT INTO StudentData(RollNo,FirstName,LastName,MobileNo,City)VALUES('".$rollno."','".$firstname."','".$lastname."','".$mobile."','".$city."')";
            mysql_query($query);
        }
        else if($num_rows>0)
        {
            while($rows=mysql_fetch_array($ans))
            {
                if($rollno!=$rows['RollNo'])
                {
                    echo('<p style="color:green">Inserting : '.$rollno.'</p>');
                    $query="INSERT INTO StudentData(RollNo,FirstName,LastName,MobileNo,City)VALUES('".$rollno."','".$firstname."','".$lastname."','".$mobile."','".$city."')";
                    mysql_query($query);
                    mysql_error();
                    break;
                }
                else
                {
                    echo('<p style="color:red">Updating Roll:'.$rollno.'and DBR:'.$rows['RollNo'].'</p>');
                    $query="UPDATE StudentData SET FirstName='".$firstname."',LastName='".$lastname."',MobileNo='".$mobile."',City='".$city."' WHERE RollNo='".$rollno."'";
                    mysql_query($query);
                    break;
                }

            }   
        }
    }

} 

Answer 1

I tried putting all the existing roll's in an array!

So I made an array from existing rollno

while($rows=mysql_fetch_array($ans))
{
 $existing_rollno[]=$rows['RollNo'];
}

Then I used this php function:-

if (in_array($rollno, $existing_rollno))

and then it worked as i wanted.

Answer 2

Does the insert statement work when num_ros <=0 ? If it doesnt then your insert statement isn't working. Plus, I am not sure but don't you need a space before VALUES.

Answer 3

Ok. So your insert statement works no problem. Now check this. You have got echo after the statement if ($rollno!=$rows['RollNo']) Does it print anything at all. If it doesnt then your if statement is wrong. Try !== instead of !=