Curso básico de PHP/RadioColorPOST

 1 <?php
 2   if( !isset( $_POST{'Color'} ) )
 3     $DisplayBlock =  "<form action=\"{$_SERVER{'PHP_SELF'}}\" method=\"post\">
 4                         <p style=\"font:18pt helvetica; color:#050050;\">
 5                           Selectiona un Color:
 6                           <input type=\"radio\" name=\"Color\" 
 7                                  value=\"Rojo\" />Rojo
 8                           <input type=\"radio\" name=\"Color\" 
 9                                  value=\"Verde\" />Verde
10                           <input type=\"radio\" name=\"Color\" 
11                                  value=\"Azul\" checked=\"checked\" />Azul
12                           <input type=\"radio\" name=\"Color\" 
13                                  value=\"Marron\" />Marr&oacute;n
14                         </p>
15                         <p>
16                           <input type=\"submit\" name=\"Submit\" 
17                                  value=\"Enviar\" />
18                         </p>
19                       </form>";
20   else
21   {
22     switch( $_POST{'Color'} )
23     {
24       case "Azul":
25         $Color = "#0000AA";
26         break;
27       case "Rojo":
28         $Color = "#AA0000";
29         break;
30       case "Verde":
31         $Color = "#00AA00";
32         break;
33       case "Marron":
34         $Color = "#930222";
35         break;
36       default:
37         $Color = "#000000";
38     }
39     $DisplayBlock =  "<p style=\"font:18pt helvetica; color:{$Color};\">
40                         Enviaste el color: {$_POST{'Color'}}
41                       </p>
42                       <p style=\"font:12pt helvetica; color:#050050:\">
43                         <a href=\"RadioColorPOST.php\">
44                           Selecci&oacute;na otro color</a>
45                       </p>";
46   }
47   require_once( "Cabeza5.inc" );
48   print( $DisplayBlock );
49   require_once( "incPie5.php" );
50 ?>