PHP - Php Script Query

Good Afternoon Team,

Am sitting with something simple using the language below. If I copy the echo output of my query as included below it works perfectly in phpmyadmin but doesn't work on a website. Variables all seem to echo consistently/correctly and POST checks seem to verify this is working correctly as well. I worry the error comes with the syntax I used in combining the sql queries. That, or perhaps LAST_INSERT_ID does not work in the php script as well as it does in phpmyadmin. All help appreciated.

if(isset($_POST[`region_id`])) {
    $competition_id = htmlentities($_POST[`competition_id`],ENT_QUOTES,`UTF-8`);
    $division_name = htmlentities($_POST[`division_name`],ENT_QUOTES,`UTF-8`);
    $region_id = htmlentities($_POST[`region_id`],ENT_QUOTES,`UTF-8`);
    $division_edit_submit = "INSERT INTO division_table (competition_id,division_name) VALUES (`$competition_id`,`$division_name`);
    INSERT INTO region_assignment_table (division_id,region_id) VALUES ((LAST_INSERT_ID()),`1`)";    
    mysqli_query($connection,$division_edit_submit);
    echo $division_edit_submit;
    }

I have a php script that I've been running that seems to have been working but now I'm wondering if some of my logic is potentially off.

I select records from a db table within a date range which I put into an array called ```$validCount```

If that array is not empty, that means I have valid records to update with my values, and if it's empty I just insert. The trick with the insert is that if the ```STORES```  is less than the ```Quantity``` then it only inserts as many as the ```STORES``` otherwise it inserts as many as ```Quantity```.

So if a record being inserted with had 

    Stores: 14 Quantity:12

Then it would only insert 12 records but if it had
  
    Stores:1  Quantity:20

It would only insert 1 record.

In short, for each customer I should only ever have as many valid records (within a valid date range) as they have stores. If they have 20 stores, I can have 1 or 2 records but should never have 30.

It seems like updating works fine but I'm not sure if it's updating the proper records, though it seems like in some instances it's just inserting too many and not accounting for past updated records.

This is the logic I have been working with:

  if(!empty($validCount)){
            for($i=0; $i<$row2['QUANTITY']; $i++){
                try{
                    $updateRslt = $update->execute($updateParams);
                }catch(PDOException $ex){
                    $out[] = $failedUpdate;
                }
            }
    }else{    
        if($row2["QUANTITY"] >= $row2["STORES"]){
            for($i=0; $i<$row2["STORES"]; $i++){     
                try{
                    $insertRslt = $insert->execute($insertParams);
                }catch(PDOException $ex){
                    $out[] = $failedInsertStore;
                }
            }
        }elseif($row2["QUANTITY"] < $row2["STORES"]){
            for($i=0; $i<$row2["QUANTITY"]; $i++){     
                try{
                    $insertRslt = $insert->execute($insertParams);
                }catch(PDOException $ex){
                    $out[] = $failedInsertQuantity;
                }
            }
        }
    }

Let's say customer 123 bought 4 of product A and they have 10 locations

    customerNumber  |  product  |  category  |  startDate  |  expireDate  | stores
    ----------------------------------------------------------------------------------
    123                 1           A           2018-08-01    2019-03-01      10
    123                 1           A           2018-08-01    2019-03-01      10
    123                 1           A           2018-08-01    2019-03-01      10
    123                 1           A           2018-08-01    2019-03-01      10

Because they purchased less than their store count, I insert 4 records. Now if my ```$validCheck``` query selects all 4 of those records (since they fall in a valid date range) and my loop sees that the array isn't empty, it knows it needs to update those or insert. Let's say they bought 15 this time. Then I would need to insert 6 records, and then update the expiration date of the other 9 records. 

    customerNumber  |  product  |  category  |  startDate  |  expireDate  | stores
    ----------------------------------------------------------------------------------
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10
    123                 1           A           2018-08-01    2019-03-11      10

There can only ever be a maximum of 10 (store count) records for that customer and product within the valid date range. As soon as the row count for that customer/product reaches the equivalent of stores, it needs to now go through and update equal to the quantity

so now I'm running this but it's not running and no errors, but it just returns back to the command line   

$total = $row2['QUANTITY'] + $validCheck;
    if ($total < $row2['STORES']) {
        $insert_count = $row2['QUANTITY'];
        $update_count = 0;
    } else {
        $insert_count = $row2['STORES'] - $validCheck; // insert enough to fill all stores
        $update_count = ($total - $insert_count); // update remainder
    }

        
    for($i=0; $i<$row2['QUANTITY']; $i++){
        try{
            $updateRslt = $update->execute($updateParams);
        }catch(PDOException $ex){
            $failedUpdate = "UPDATE_FAILED";
            print_r($failedUpdate);
            $out[] = $failedUpdate;
        }
    }
    
        
    for($i=0; $i<$insert_count; $i++){
        try{
            $insertRslt = $insert->execute($insertParams);
        }catch(PDOException $ex){
            $failedInsertStore = "INSERT_STORE_FAILED!!!: " . $ex->getMessage();
            print_r($failedInsertStore);
            $out[] = $failedInsertStore;
        }
    }```

case "update-delete":
	if(isset($_POST['highlight-purchased'])) 
		{
			// ****** Setup customized query to obtain only items that are checked ******
			$sql = "SELECT * FROM shoplist WHERE";
					for($i=0; $i < count($_POST['checkboxes']); $i++)
						{
							$sql=$sql . " idnumber=" . $_POST['checkboxes'][$i] . " or";
						}
					$sql= rtrim($sql, "or");
											
			$statement = $conn->prepare($sql);
			$statement->execute();
																						
			// *** fetch results for all checked items (1st query) *** //
			$result = $statement->fetchAll();

			$statement->closeCursor();
											
			// Setup query that will change the purchased flag to "N", if it's currently set to "Y"
			$sqlSetToN = "UPDATE shoplist SET purchased = 'N' WHERE purchased = 'Y'";
											
			// Setup query that will change the purchased flag to "Y", if it's currently set to "N", "", or NULL
			$sqlSetToY = "UPDATE shoplist SET purchased = 'Y' WHERE purchased = 'N' OR purchased = '' OR purchased IS NULL";

			$statementSetToN = $conn->prepare($sqlSetToN);
			$statementSetToY = $conn->prepare($sqlSetToY);
											
			/*** loop through the results/collection of checked items ***/
			foreach($result as $row)
				{
					if ($row["purchased"] != "Y")
						{
							// *** fetch one row at a time pertaining to the 2nd query *** //
							$resultSetToY = $statementSetToY->fetch();
															
							foreach($resultSetToY as $row)
								{															
									$statementSetToY->execute();																
								}
						}
					else
						{
							// *** fetch one row at a time pertaining to the 2nd query *** //
							$resultSetToN = $statementSetToN->fetch();
															
							foreach($resultSetToN as $row)
								{															
									$statementSetToN->execute();																
								}
						}
				}
				break;
		}