THis is add.php

prepare$($$sql$))\{$

$$ $stmt$->$bind$\_$param$("$sddds$",$ $productname, $availablequantity, $costperitem$,$ $productdescription, $revenue$)$;

$//$ Execute the statement

$$ if $($$stmt$->$execute$())\{$

$$ $message $=$ "Product added successfully!";

$\}$ else $\{$

$$ $errorMessage $=$ "Error: $".$ $stmt$->$error;$\}$

$//$ Close the statement

$$ $stmt$->$close$()$;

$\}$ else $\{$

$$ $errorMessage $=$ "Error preparing statement: $".$ $conn$->$error;

$\}$

$\}$

$\}$

$?>$