Curso básico de PHP/TextColorPOST

 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                           Esta caja est&aacute;
 8                           <input type=\"text\" name=\"Caja1\" size=\"10\"
 9                                  maxlength=\"8\" value=\"ReadOnly\" 
10                                  readonly=\"readonly\" />
11                           <br />
12                           Esta caja est&aacute;
13                           <input type=\"text\" name=\"Caja2\" size=\"10\"
14                                  maxlength=\"8\" value=\"Disabled\" 
15                                  disabled=\"disabled\" />
16                           <br /><br />
17                           Que Color? ( \"Verde\", \"Rojo\" o \"Azul\" )
18                           <input type=\"text\" name=\"Color\" size=\"10\"
19                                  maxlength=\"5\" value=\"Azul\" />
20                         </p>
21                         <p>
22                           <input type=\"submit\" name=\"Submit\" 
23                                  value=\"Enviar\" />
24                           &nbsp;&nbsp;&nbsp;&nbsp;
25                           <input type=\"reset\" name=\"Reset\" 
26                                  value=\"Reset\" />
27                         </p>
28                       </form>";
29   else
30   {
31     switch( strtolower( $_POST{'Color'} ) )
32     {
33       case "azul":
34         $Color = "#0000AA";
35         break;
36       case "rojo":
37         $Color = "#AA0000";
38         break;
39       case "verde":
40         $Color = "#00AA00";
41         break;
42       default:
43         $SelectValid = 0;
44     }
45     if( $SelectValid )
46       $DisplayBlock =  "<p style=\"font:18pt helvetica; color:{$Color};\">
47                           Enviaste el color: {$_POST{'Color'}}
48                         </p>
49                         <p style=\"font:12pt helvetica; color:#050050:\">
50                           <a href=\"TextColorPOST.php\">
51                             Selecci&oacute;na otro color</a>
52                         </p>";
53     else
54       header( "Location: MensajeError.php?Errno=1003&Var={$_POST{'Color'}}" );
55   }
56   require_once( "Cabeza5.inc" );
57   print( $DisplayBlock );
58   require_once( "incPie5.php" );
59 ?>