How to use str_split ()?

Question

I am currently working in my project and my problem starts here : I am inserting in a table and it insert correctly but the problem is it look so messy because in one id theres a lot of reference numbers they are just separated by commas , and what I want to do is use str_split to separate it...

Here is my code:

$sql = "INSERT INTO transaction_detail (`transaction_id`,`ref_number`)
          VALUES ('$transaction_id','$ref_number') ";

    $query = $conn->query($sql);

How can I do it? I also want to use while loop because I don't know the maximum number of ref_number? Can somebody help me? Thanks :)

UPDATE

id  transaction_id ref_number
1           12      12411235435
2           12      214354657
3           12      2153564657

I want that my output will look something like this because my current output look something like this.

id    transaction_id    ref_number
1     12                12411235435,214354657,2153564657

UPDATE

$ref_array = explode(',' , $ref_number);
$po_array = explode(',' , $po_number);
$inv_array = explode(',' , $inv_number);
$asn_array = explode(',' , $asn_number);
$adj_array = explode(',' , $adj_number);
$amount_array = explode(',' , $amount);

// count the number of po,invoice,asn and adj
if(count($po_array) != count($ref_array) || count($inv_array) != count($ref_array) || count($asn_array) != count($ref_array) || count($adj_array) != count($ref_array) || count($ref_array) != count($amount_array)){

    foreach ($ref_array as $i => $ref_num){
        $po_num = isset($po_array[$i]) ? $po_array[$i] : '' ; //leave blank there is no $po_array[$i]
        $inv_num = isset($inv_array[$i]) ? $invoice_array[$i] : '';
        $asn_num = isset($asn_array[$i]) ? $asn_array[$i] : '' ;
        $adj_num = isset($adj_array[$i]) ? $adj_array[$i] : '' ;
        $amount_num = isset($amount_array[$i])? $amount_array[$i] : '';



        if(intval($ref_num) != 0 ){

            $conn->query ("INSERT INTO transaction_detail (`transaction_id`,`ref_number`,`po_number`,`inv_number`,`asn_number`,`adj_number`,`amount`)
                    VALUES ('$transaction_id','$ref_num','$po_num','$inv_num','$asn_num','$adj_num','$amount_num') " );
        }
    }  
}  

Here are the errors :

[29-Jun-2015 04:20:59 Europe/Berlin] PHP Notice: Undefined offset: 1 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:20:59 Europe/Berlin] PHP Notice: Undefined offset: 2 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:21:11 Europe/Berlin] PHP Notice: Undefined offset: 1 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:21:11 Europe/Berlin] PHP Notice: Undefined offset: 2 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:21:11 Europe/Berlin] PHP Notice: Undefined offset: 3 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:21:11 Europe/Berlin] PHP Notice: Undefined offset: 4 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:21:11 Europe/Berlin] PHP Notice: Undefined offset: 5 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

[29-Jun-2015 04:21:11 Europe/Berlin] PHP Notice: Undefined offset: 6 in C:\\xampp\\htdocs\\WebService\\webservice_revised.php on line 83

Answer 1

Use explode() to split up the comma-separated reference numbers, and loop over them with a foreach .

foreach (explode(',', $ref_number) as $refnum) {
    $conn->query("INSERT INTO transaction_detail (`transaction_id`,`ref_number`)
                  VALUES ('$transaction_id','$refnum') ";
}

To include the PO number, explode that variable into another array, and use the index in the foreach loop to access it:

$transaction_id = '123456';
$po_number = '1,2';
$ref_number = '11,22,33,44,55,66';

$po_array = explode(',', $po_number);
$ref_array = explode(',', $ref_number);

foreach ($ref_array as $i => $refnum) {
    $ponum = isset($po_array[$i]) ? $po_array[$i] : '';
    if (intval($refnum) != 0) {
        $conn->query("INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`)
                      VALUES ('$transaction_id','$refnum', '$ponum') ");
    }
}

I tested the above code, it performs the following queries, with no errors or notices from PHP:

INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`) VALUES ('123456','11', '1') 
INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`) VALUES ('123456','22', '2') 
INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`) VALUES ('123456','33', '') 
INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`) VALUES ('123456','44', '') 
INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`) VALUES ('123456','55', '') 
INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`) VALUES ('123456','66', '') 

If you could also have fewer ref numbers than po numbers, you could use this code to use the longer array for the loop:

$po_array = explode(',', $po_number);
$ref_array = explode(',', $ref_number);
$limit = max(count($po_array), count($ref_array));

for ($i = 0; $i < $limit; $i++) {
    $ponum = isset($po_array[$i]) ? $po_array[$i] : '';
    $refnum = isset($ref_array[$i]) ? $ref_array[$i] : '';
    $conn->query("INSERT INTO transaction_detail (`transaction_id`,`ref_number`, `po_number`)
                    VALUES ('$transaction_id','$refnum', '$ponum') ");
}