How to use $_GET with arrays?

pseudo class · October 25th, 2004, 09:43 PM

I'm on chapter 3 of the book and I just need to know how to echo variables like $enginesize[0], $enginesize[1], etc..etc.. with register_globals shut off.

Thanks in advance

Snib · October 26th, 2004, 12:16 PM

Try $_GET['enginesize'][0], etc.

HTH!

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pseudo class · November 1st, 2004, 11:32 PM

that didnt work for me either, do you mean like

echo . $_GET['enginesize'][0]
echo . $_GET['enginesize'][1]
echo . $_GET['enginesize'][2]

etc...etc

b/c that didnt work for me.

Thanks in advance

richard.york · November 2nd, 2004, 08:09 AM

$_GET works if the method of the form is the get method. I'm betting that the method of the form is probably post, whereas you should use the $_POST superglobal.

$_POST['enginesize'][0]

If you're still not getting anywhere do something like this to see if anything is being passed.

echp "<pre>";
var_dump($_POST);
echo "</pre>";

HTH!

Regards,
Rich

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Tim Gamble · November 20th, 2004, 12:56 PM

Quote:

quote:Originally posted by richard.york
$_GET works if the method of the form is the get method. I'm betting that the method of the form is probably post, whereas you should use the $_POST superglobal.

$_POST['enginesize'][0]

If you're still not getting anywhere do something like this to see if anything is being passed.

echp "<pre>";
var_dump($_POST);
echo "</pre>";

HTH!

Regards,
Rich

--
[http://www.smilingsouls.net]
[http://pear.php.net/Mail_IMAP] A PHP/C-Client/PEAR solution for webmail

Tim Gamble · November 20th, 2004, 01:10 PM

Quote:

quote:Originally posted by Tim Gamble

Quote:

quote:Originally posted by richard.york

Quote:

I'm having the same problem with the arrays in chapter 3 with the register_globals turned off. I took your suggestion and checked the method and it was set as GET but am still not able to echo more than one variable. Here is the code for listbox.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

    <head>
        <meta http-equiv="content-type" content="text/html;charset=iso-8859-1">
        <title>List Boxes</title>
    </head>

    <body bgcolor="#ffffff">
        <form id="FormName" action="listbox.php4" method="GET" name="FormName">
            What price car are you looking to buy? <select name="Price" size="4" multiple>
                <option>Under $5,000</option>
                <option>$5,000-$10,000</option>
                <option>$10,000-$25,000</option>
                <option>Over $25,000</option>
            </select><br>
            <p>What size engine would you consider? <select name="EngineSize[]" size="4" multiple>
                    <option>1.0L</option>
                    <option>1.4L</option>
                    <option>1.6L</option>
                    <option>2.0L</option>
                </select><br>
                <br>
                <input type="submit" name="submitButtonName" value="Let me know"><br>
            </p>
        </form>
    </body>

</html>

and here is the code for listbox.php4

<html>

    <head>
        <meta http-equiv="content-type" content="text/html;charset=iso-8859-1">
        <title>agl:pagetitle</title>
    </head>

    <body bgcolor="#ffffff">
        <p></p>

You chose <br>
        <?php
echo $_GET['Price'];
?>
<br>
<?php
echo $_GET['EngineSize'][0];
?>

    </body>

</html>

The code will only returrn the last item selected in the EngineSize list.

Can you suggest anything else?

Tim

richard.york · November 20th, 2004, 02:06 PM

Ok, the problem with multiple select fields is the there isn't a way to see if option 4 is checked, versus say option 1, you can only look at the value.

For this example a foreach loop is most appropriate.

Code:

<?php
echo "<strong>The values of 'enginesize' are:</strong><br />\n";

if (isset($_GET['enginesize']) && is_array($_GET['enginesize']))
{
    foreach ($_GET['enginesize'] as $value)
    {
        echo $value."<br />\n";
    }
}
else
{
    echo "You didn't enter any values for 'enginesize'!<br />\n";
}
?>

The foreach loop is designed specifically for arrays, in this case $_GET['enginesize'] is a multidimensional array, so it itereates through each value contained in it, when running this you'll see that only the selected values are output.

HTH!

Regards,
Rich

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