PHP Forum

**NJBS-COM** · 11-02-2004, 12:42 AM

I'm learning PHP and i'm having trouble. How would pass the variables from a form with register_globals turned off?

<html>
<body>
<form method=POST Action="listbox.php">
What price of car are you looking for?
<select name="price">
<option>Under $5,000</option>
<option>$5,000-$10,000</option>
<option>$10,000-$25,000</option>
<option>Over $25,000</option>
</select>
<br>
<br>
What size engine would you consider?
<select name="enginesize[]"multiple >
<option>1.0L</option>
<option>1.4L</option>
<option>1.6L</option>
<option>2.0L</option>
</select>
<br>
<br>
<input type=submit value="Enter">
</form>
</body>
</html>

**foobar** · 11-02-2004, 01:30 AM

To retrieve the variables in the page specified in the action attribute of your form (in your case, listbox.php) use:

PHP Code:


			
$_POST['field_name'];

For a form passed using the POST method, or:

PHP Code:


			
$_GET['field_name'];

For a form passed using GET.

In both cases, 'field_name' is the name of the field for which you want to get the value. IN your case, you have two: price and enginesize.

However, if you use the same form you posted, you'll run into problems: notably, no value will ever be passed, since you must specify, in each option tag, the value attribute, which is the value to pass if that specific radio button was selected.

Whereas textboxes (input type="text") pass their contents, for radio buttons and checkboxes, you must specify each controls' value. The text you insert between the start and closing tags are only for display purposes.

Hope that helps.

**NJBS-COM** · 11-02-2004, 02:09 AM

Thanks for you help, how would i use the $_POST['field_name']; for the multiple enginesize options?

Code:

<?php

echo $_POST['price'];
echo  dunno what to do here  

?>

**NJBS-COM** · 11-03-2004, 08:28 PM

**vivekar** · 11-03-2004, 09:34 PM

PHP Code:


			
$sizes = $_POST['enginesize'];

The $sizes will hold an array. You need to use a foreach loop to use the values of the array.

You can print the $sizes array like this...

PHP Code:


			
print "<pre>";

print_r ($sizes);

print "</pre>";