Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

You need to double evaluate.
$$errortype resolves to $invalid
evaluating resolves to the string containing $number.
That has to be evaluated as well.

Also why not use foreach and you can use eval()\'s
return value. See below:

<?php
$errormessage = \"\";

$error[\"1231\"] = \"invalid\";
$error[\"1255\"] = \"invalid_max\";

$invalid     = \'You did not choose a valid quantity for item number $item.\\n\';
$invalid_min = \'You did not order the minimum amount for item $item.\\n\';
$invalid_max = \'You ordered more than you were permitted for item $item.\\n\';

//while (list($item, $errortype) = each($error)) {
foreach($error as $item=>$errortype) {
   	$errormessage .= eval(\"echo eval(\\\"echo \\\\\\\"$$errortype\\\\\\\";\\\");\");
}

echo $errormessage;
?

Send further questions please php-general@lists.php.net

CAUTION: The input field scrambled my input!

You have to use 
- 3 slashes where it shows 7
- 1 slash where it shows 3
- 0 slash where it shows 1

This doesn't work as expected.  ($errormessage never actually gets set for some reason.)  But the double eval appears to work like it should.

I also tried:
eval("\$errormessage .= eval(\"echo \\\"$$errortype\\\";\";"); and it still didn't work.

meant to type:
eval("\$errormessage .= eval(\"echo \\\"$$errortype\\\";\");");
in the above example.