unidentified index

[compstudent]

Hi,

I have this code

for ($i = 1; $i<4; $i++)
{
$game = "game_$i";
$radio = "radio_$i";
$col = $_POST['$radio']; //Error is here
$username = $_SESSION['username']; ........

And it goes on to save names in a database.

The form that it is from is this:

echo "<form id='predict' action='savePredict.php' method='post'>";
for ($i=1; $i<4;$i++)
{
$gameid = "game_$i";

$name = "radio_$i";
$get = mysql_query("SELECT*FROM $gameid WHERE id='1'");


$rows = mysql_fetch_assoc($get);
echo "<div class='game'>";
echo "<label class='team1'>$rows[team1] <input type='radio' name='$name' value='team1'/></label>";
echo "<label class='team2'><input type='radio' name='$name' value='team2'/>$rows[team2] </label><br/>";
$get = mysql_query("SELECT*FROM $gameid WHERE id='2'");
$rows = mysql_fetch_assoc($get);
echo "<label class='bet1'>$rows[team1]</label><label class='bet2'>$rows[team2]</label><br/><br/>";
echo "<label class='tie'>Tie<input type='radio' name='$name' value='tie'/> </label><br/>";
echo "</div>";



}

I always get the error unidentified index $radio whenever i try to submit data. I don't know too much about radio buttons and using them with $_POST in php - but I can't find where i am going wrong.

Thanks

[Amailer]

code:

$col = $_POST['$radio'];

should be

code:

$col = $_POST["$radio"];

Double quotes instead of single quotes.

http://www.php.net/manual/en/language.types.string.php#language.types.string.parsing

[compstudent]

Thanks....Good to know.

[yoursecretninja]

You only need to put the double quotes when you want to evaluate a variable inside a string. In your example with the key you can ommit the quotes.

$col = $_POST[$radio] is just fine.