Curso básico de PHP/PasswordColorPOST

 1 <?php
 2   $SelectValid = 1;
 3 
 4   if( !isset( $_POST{'Color'} ) )
 5     $DisplayBlock =  "<form action=\"{$_SERVER{'PHP_SELF'}}\" method=\"post\">
 6                         <p style=\"font:18pt helvetica; color:#050050;\">
 7                           Que Color? ( \"Verde\", \"Rojo\" o \"Azul\" )
 8                           <input type=\"password\" name=\"Color\" size=\"10\"
 9                                  maxlength=\"5\" />
10                         </p>
11                         <p>
12                           <input type=\"submit\" name=\"Submit\" 
13                                  value=\"Enviar\" />
14                         </p>
15                       </form>";
16   else
17   {
18     switch( $_POST{'Color'} )
19     {
20       case "Azul":
21         $Color = "#0000AA";
22         break;
23       case "Rojo":
24         $Color = "#AA0000";
25         break;
26       case "Verde":
27         $Color = "#00AA00";
28         break;
29       default:
30         $SelectValid = 0;
31     }
32     if( $SelectValid )
33       $DisplayBlock =  "<p style=\"font:18pt helvetica; color:{$Color};\">
34                           Enviaste el color: {$_POST{'Color'}}
35                         </p>
36                         <p style=\"font:12pt helvetica; color:#050050:\">
37                           <a href=\"PasswordColorPOST.php\">
38                             Seleccióna otro color</a>
39                         </p>";
40     else
41       $DisplayBlock =  "<p style=\"font:28pt helvetica; color:#AA0000;
42                                  text-decoration: blink;\">
43                           &iexcl;Color INVALIDO!
44                         </p>
45                         <p style=\"font:14pt helvetica; color:#000000;\">
46                           &iquest;Olvidaste que PHP es sensible a MAYUSCULAS y 
47                           minusculas?
48                         </p>
49                         <p style=\"font:12pt helvetica; color:#050050:\">
50                           <a href=\"PasswordColorPOST.php\">
51                             Selecci&oacute;na otra color</a>
52                         </p>";
53   }
54   require_once( "Cabeza5.inc" );
55   print( $DisplayBlock );
56   require_once( "incPie5.php" );
57 ?>