PHP - Array Values To Insert In Db

When i click my submit button i am posting the following.

		Array
(
    [submitStaffOrder] => 
    [staffMember] => Array
        (
            [0] => 2
            [1] => ANYCHEF1
        )

    [date] => Array
        (
            [0] => 2020-02-18
            [1] => 2020-02-18
        )

    [startTime] => Array
        (
            [0] => 11:01
            [1] => 10:10
        )

    [finishTime] => Array
        (
            [0] => 11:01
            [1] => 10:01
        )

    [delExisting] => Array
        (
            [0] => 
            [1] => toDel
        )

)

I would like to update/insert if delExisting is blank and delete if it has toDel in there.

I have the following but i am pretty sure the if is not working.

$date = $_POST['date'];
	$stime = $_POST['startTime'];
	$ftime = $_POST['finishTime'];
	$del = $_POST['delExisting'];
	$staff = $_POST['staffMember'];

$stmt = $conn -> prepare("
	                         INSERT IGNORE INTO ssm_staff_order (job_id, staff_id, staff_start_time, staff_finish_time, staff_start_date, staff_finish_date) 
	                         VALUES (?,?,?,?,?,?)
	                         ON DUPLICATE KEY 
	                         UPDATE 
	                         staff_start_time = VALUES(staff_start_time),
	                         staff_finish_time = VALUES(staff_finish_time);
	                         ");

	$delstmt = $conn -> prepare("
		                         DELETE FROM ssm_staff_order
		                         WHERE staff_id = ?
		                         AND job_id = ?
		                         AND staff_start_date = ?
		                         ");

	foreach ($staff as $key => $staffId) {
		if ($del == '') {
			$start = $date[$key].' '.$stime[$key];
			$finish = $date[$key].' '.$ftime[$key];
			$stmt -> bind_param('isssss', $jid, $staffId, $start, $finish, $date[$key], $date[$key]);
			$stmt -> execute();
		}
		

		
		if ($del == 'toDel') {
			$delstmt -> bind_param('sis', $staffId, $jid, $date[$key]);
			$delstmt -> execute();
		}
	}
	
}

Can i do what i am trying to do or am i way off here?

I struggle with arrays

Dear All Members

here is my table data..

(4 Columns/1row in mysql table)

id                 order_no               order_date                  miles
310                001                   02-15-2020                MI,108.53
                                                                                     Oh,194.57
                                                                                     PA,182.22
                                                                                     WA,238.57

How to split(miles) single column into (state, miles) two columns and output like following 5 columns /4rows in mysql using php code.

(5 Columns in mysql table)
------------------------------------------------------------------------------------

id                  order_no              order_date              state      miles

310                001                   02-15-2020               MI          108.53

310                001                   02-15-2020              Oh          194.57

310                001                   02-15-2020              PA          182.22

310                001                   02-15-2020             WA          238.57
 

------------------my php code -----------

<?php
//invoice.php  
include('../includes/config.php');

if(isset($_POST["add"]))
{
$order_no=$_GET['order_no'];
$order_date=$_GET['order_date'];
$miles=$_POST['miles'];

$miles = explode("\r\n", $_POST["miles"]);
$newdata = "'" . implode("','", $_POST["miles"]) . "'";
$sql ="INSERT INTO tble_states_miles(order_no,order_date, miles) VALUES(:order_no, :order_date, :newdata)";

$query = $dbh->prepare($sql);
$query-> bindParam(':order_no', $order_no, PDO::PARAM_STR);
$query-> bindParam(':order_date', $order_date, PDO::PARAM_STR);
$query-> bindParam(':miles', $newdata, PDO::PARAM_STR);

$lastInsertId = $dbh->lastInsertId();
if($lastInsertId)
{
echo "<script type='text/javascript'>alert('Added Sucessfull!');</script>";
echo "<script type='text/javascript'> document.location = 'ifta_miles_calculationlist_added.php'; </script>";
}
else 
{
$error="Something went wrong. Please try again";
}

if($query->execute()) {

$sql = "update tis_invoice set flag='1' where order_no=:order_no";
$query = $dbh->prepare($sql);
$query-> bindParam(':order_no', $order_no, PDO::PARAM_STR);

$query->execute();

}
}
?>

----------------- my form code ------------------

 <?php
                   $order_no=$_GET['order_no'];
        $sql = "SELECT * from tis_invoice where order_no = :order_no";
        $query = $dbh -> prepare($sql);
        $query->execute(
  array(
   ':order_no'       =>  $_GET["order_no"]
  )
 );
        $result = $query->fetchAll();
        foreach($result as $row)
?>
    
                    <form method="post">
                        <table align="center" style="width: 55%">
                        <tr><td>Invoice Number</td></tr>
                        <tr><td><input type="text" name="order_no" value="<?php echo $row["order_no"]; ?>" readonly=""></td></tr>
                        <tr><td>Invoice Date</td></tr>
                        <tr><td><input type="text" name="order_no" value="<?php echo $row["order_date"]; ?>" readonly=""></td></tr>
                        <tr><td>
                               <textarea name="miles" class="form-control" rows="10" placeholder="" required></textarea>
                           </td></tr>
                           <tr><td>
                         
                            <input type="submit" name="add" class="btn btn-primary" value="Add" />
                       </td></tr></table>
                    </form>

-- Can any one help how to correct my code..present nothing inserted on table

Thank You