Question

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Robust, Mature HTML Parser for PHP
Help coding an HTML Form

This is a mockup of design that I have in mind – https://i.stack.imgur.com/NgoeS.jpg

From each set of options, only 1 must be checked and depending on the combination of checked boxes the ‘submit’ button directs to a webpage.

The two features will be

Price(Please choose one)

1-99 100-249 250-499

Manufacturer(Please choose one)

A B C

[SUBMIT BUTTON]

The coding that I can understand which is definitely wrong is:

//search page
...
<form action='search.php' method='post'>
<input type=radio name=product value='a'>A?</input>
<input type=radio name=product value='b'>B?</input>
<input type=radio name=product value='c'>C?</input>
<br>
<input type=radio name=price value='5'>5-10?</input>
<input type=radio name=price value='10'>11-15?</input>
<input type=radio name=price value='other'>15+?</input>
... </form>

And in search.php, something like …

<?php
$product = $_POST("product");
$price = $_POST("price");
...
if (($product == "A") && ($price == "5")) {
 Location("a-5-10.html"); // Products matching A, price 5-10 etc
elseif (($product == "B") && ($price == "5")) {
 Location("b-5-10.html"); //Products matching b, price 5-10 etc
....
endif
?>

EDIT as per OP’s comments,
the request is not being redirected to “b-5-10.html” or “a-5-10.html” etc.

Answer 1

$_POST is an array, not a function, you want $_POST['product'];

$product = $_POST["product"]; //note [ and ] instead of ( and )
$price = $_POST["price"];

Also Location is not a function that I am aware of as @erisco pointed out you need to use header

if (($product == "A") && ($price == "5")) {
  header("Location: a-5-10.html"); // Products matching A, price 5-10 etc
} //also note the closing brace
elseif (($product == "B") && ($price == "5")) 
{ 
  header("Location: b-5-10.html"); //Products matching b, price 5-10 etc
} //again, closing brace, not "endif"