Why is the quantity not saving when i run my save.php$.$ Whenever i submit or press enter it doesn't submit to the database.

prepare$("$SELECT user$\_$id$,$ branch FROM users WHERE username $=?")$;

$userQuery$->$bind$\_$param$("$s$",$ $username$)$;

$userQuery$->$execute$()$;

$userResult $=$ $userQuery$->$get$\_$result$()$;

$userRow $=$ $userResult$->$fetch$\_$assoc$()$;

$userId $=$ $userRow$[\text{'}$user$\_$id$\text{'}]$;

$userBranch $=$ $userRow$[\text{'}$branch$\text{'}]$;

$userLevel $=$ $$\_$SESSION$[\text{'}$level$\text{'}]$; $//$ Fetch user level from session

foreach $($$ids as $id$)\{$

$sizes $=$ $$\_$POST$[\text{'}$size$\text{'}][$$id$]??[]$;

$sizesString $=$ implode$(\text{'},\text{'},$ $sizes$)$;

$quantity $=$ $$\_$POST$[\text{'}$quantity$\text{'}][$$id$]??0$;

$branch $=$ $userBranch; $//$ Use the branch from the user info

if $($$userLevel $==\text{'}2\text{'}||$ $userLevel $==\text{'}3\text{'})\{$

$//$ Update only the quantity

$orderStmt $=$ $conn$->$prepare$("$

INSERT INTO $`$order$`($branch$,$ user$\_$id$,$ item$\_$id$,$ quantity, size$)$

VALUES $(?,?,?,?,?)$

ON DUPLICATE KEY UPDATE

quantity $=$ VALUES$($quantity$)$

$")$;

$\}$ elseif $($$userLevel $==\text{'}1\text{'})\{$

$//$ Update only the size

$orderStmt $=$ $conn$->$prepare$("$

INSERT INTO $`$order$`($branch$,$ user$\_$id$,$ item$\_$id$,$ quantity, size$)$

VALUES $(?,?,?,?,?)$

ON DUPLICATE KEY UPDATE

size $=$ VALUES$($size$)$

$")$;

$\}$ else $\{$

$//$ If user level is not $1,2,$ or $3,$ skip the operation

continue;

$\}$

$orderStmt$->$bind$\_$param$("$siiis$",$ $branch, $userId, $id$,$ $quantity, $sizesString$)$;

$orderStmt$->$execute$()$;

$\}$

header$("$Location: order.php$")$;

exit$()$;

$\}$ else $\{$

header$("$Location: order.php$")$;

exit$()$;

$\}$

$?>$

Note: The $59$ was manually inputted through mysql$.\backslash$table$[[$Day$,$Meal Type,Type,Item,Size,Color,Site,Quantity$],[$Monday$,$Lunch,Fried,Fried German Franks,Small,Large,XL$,$Brown,On Site,$59],[$Monday$,$Breakfast,Fried,Hungarian Sausage,Small No Fry,Medium No Fry,Large,Brown,On Site,$0],[$Monday$,$Breakfast,Fried,Fried Luncheon Meat,Small,Brown,On Site,$0]]$