Declaring Variable Runs Variable - php

Question

I am trying to create a functioning search field using ProductID, then using this to display the row in the product table where the ProductID exists. The problem I am having is that if I have the code as follows: The submit button below executes the $deleteprod and $deltesale code which all it should (from my understanding) is submit the ProductID variable.
<form action="delete.php" method="post">
<input value="" placeholder="Product ID" name="ProductID" type="text"/> <br>
<input type="submit" onclick="" value="Search"/
</form>
<?php
$ProductID = $_POST['ProductID'];
$db = mysql_connect("localhost:3307", "root", "usbw");
$deleteprod = mysql_query("DELETE FROM gameshop.product WHERE (product.ProductID = '$ProductID')");
$deletesale = mysql_query("DELETE FROM gameshop.sale WHERE (sale.ProductID = '$ProductID')");
$deletebutton = "<button onclick=\"$deletesale; $deleteprod; location.href='database.php'\" style='width:200px; background-color:red;'>Delete Row</button>";
mysql_select_db("gameshop",$db);
$result = mysql_query("SELECT product.*, sale.Price
FROM gameshop.product, gameshop.sale
WHERE (product.ProductID = '$ProductID' AND sale.ProductID = '$ProductID')",$db);
if (!$result){
print mysql_rror();
}
elseif ($myrow = mysql_fetch_array($result)){
echo "<table style='text-align:center;' border=1>\n";
echo "<tr><td>Product ID</td><td>Product Name</td>", "<td>Publisher</td><td>Developer</td>", "<td>Release Date</td><td>Stock</td>", "<td>Console</td> <td>Rank</td><td>Price</td><td>Delete?</td></tr>\n";
do{
printf("<tr><td>%4d</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%1d</td><td>%s</td><td>%1d</td><td>%2d</td><td>%s</td></tr>\n", // %s are syntax (string)
$myrow["ProductID"], $myrow["ProductName"], $myrow["Publisher"], $myrow["Developer"], $myrow["ReleaseDate"], $myrow["Stock"], $myrow["Console"], $myrow["Rank"], $myrow["Price"], $deletebutton);
}
while ($myrow = mysql_fetch_array($result));
echo "</table>\n";
}
mysql_close($db);
?>
If I were to move the $db = MySQL_connect("localhost:3307", "root", "usbw"); to below the $delete variables, this problem does not occur and it creates the single row table. However when attempting to click on the $deletebutton, the code does not execute and no row is deleted.
What am I doing wrong?

Answer 1

the problem is, when you click the button you call JavaScript, not PHP.
I think you could solve it making another PHP page with your deletesale and deleteprod which takes Product_ID with post.
so this file would have a php script like this:
$ProductID = $_POST['ProductID'];
$db = mysql_connect("localhost:3307", "root", "usbw");
mysql_select_db("gameshop",$db);
$result = mysql_query("SELECT product.*, sale.Price
FROM gameshop.product, gameshop.sale
WHERE (product.ProductID = '$ProductID' AND sale.ProductID = '$ProductID')",$db);
if (!$result){
print mysql_error();
}
elseif ($myrow = mysql_fetch_array($result)){
echo "<table style='text-align:center;' border=1>\n";
echo "<tr><td>Product ID</td><td>Product Name</td>", "<td>Publisher</td> <td>Developer</td>", "<td>Release Date</td><td>Stock</td>", "<td>Console</td> <td>Rank</td><td>Price</td><td>Delete?</td></tr>\n";
do{
printf("<tr><td>%4d</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%1d</td><td>%s</td><td>%1d</td><td>%2d</td><td>",$myrow["ProductID"], $myrow["ProductName"], $myrow["Publisher"], $myrow["Developer"], $myrow["ReleaseDate"], $myrow["Stock"], $myrow["Console"], $myrow["Rank"], $myrow["Price"]);
printf "<form method=\"post\" action=\"delete_page.php\"><input type=\"text\" style=\"display:none\" name=\"ProductID\" value=\"$ProductID\"/><input type=\"submit\" value=\"delete product\"/></form>"
printf "</td></tr>"
}
while ($myrow = mysql_fetch_array($result));
echo "</table>\n";
}
mysql_close($db);
and then you would have delete_page.php with
$ProductID = $_POST['ProductID'];
$db = mysql_connect("localhost:3307", "root", "usbw");
mysql_select_db("gameshop",$db);
mysql_query("DELETE FROM gameshop.product WHERE (product.ProductID = '$ProductID')");
mysql_query("DELETE FROM gameshop.sale WHERE (sale.ProductID = '$ProductID')");
mysql_close($db);
then you can add a link back to the main page.
Be sure to check for typos :)