Description:
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When using input id instead of name as per xhtml spec, $_POST doesn't retrieve the variable.

Reproduce code:
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<?php

echo "POST:".$_POST['feedback'];

echo "<form name=\"form1\" method=\"post\" action=\"".$_SERVER['PHP_SELF']."\">\n";

echo "<p><textarea id=\"feedback\" cols=\"50\" rows=\"5\"></textarea></p>\n";

echo "<p><input type=\"submit\" name=\"Submit\" value=\"Submit\" /></p>\n";

echo "</form>\n";

?>

Expected result:
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POST:feedback text

Actual result:
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POST: