Assigning autonumber to HTML form entry

Question

I have searched everywhere, but nothing I find seems to help solve this. I have a html web form (in a PHP document) that writes data to a CSV file, and below the form is a table that filters the CSV data back in based on a key word. I have no problems with my existing code for that part. However, I need to have an auto-number function that assigns a number to each form. I need help on even where to start. I'm still relatively new to coding, so any help would be great. Edit: Here is the code I use to write my data to the csv file.

if($_POST['formSubmit'] == "Submit")
{
    $fs = fopen("fixturerequests.csv","a");
    fwrite($fs,$varFixNum . ", " . $varRequester . ", " . $varDept . ", " . $varSupervisor . ", " . $varDesc . ", " . $varParts . ", " . $varWC . ", " . $varAddinfo . ", " . $varDateReq . ", " . $varDateNeed . ", " .$varStatus . "\n");
    fclose($fs);

    header("Location: successfullysubmitted.php");
    exit;
}

Any guidance would be excellent. Thank you.

Answer 1

You can use this function

function next_available_form_id(){

    $rows = file('fixturerequests.csv');  //put our csv file into an array

    if(empty($rows)) return 1;            //if our csv is empty we start from 1

    $data = str_getcsv(array_pop($rows)); //array_pop gets the last row

    return $data[0]+1;            //we get first field and add 1 to it
                                  //Just use the field where you store the form number 
                                  //e.g if you store the form number in the  
                                  //4th field replace $data[0] with $data[3]

}

Based on the code you provided you can use the function I provided to get the next form_id before storing it in the csv file.Just make this modification to your code after opening the csv file :

$fs = fopen("fixturerequests.csv","a");
$form_id=next_available_form_id();  //ADD THIS to get the next available id

//And insert $form_id as the first field in your csv file  
fwrite($form_id,$fs,$varFixNum . ", " . $varRequester . ", " . $varDept . ", " . $varSupervisor . ", " . $varDesc . ", " . $varParts . ", " . $varWC . ", " . $varAddinfo . ", " . $varDateReq . ", " . $varDateNeed . ", " .$varStatus . "\n"); 

Notice: Of course since the csv you have now does not have form_id as the first field you should either create your csv file from scratch or add form numbers in your existing records.In the example I use awk to do that:

  awk '{printf "%d,%s\n", NR, $0}' < fixturerequests.csv