Need help on combo drop box validation

kof00

Hi im just starting to learn php and its taking me forever to figure out how to validate my single select courty drop box


<!-- single select -->


<font size="5" color="black" face="serif">
<BR>Country</font>
<BR><SELECT NAME="country" SIZE="1">
<OPTION VALUE="Nothing">-----Select Country-----
<OPTION VALUE="Brazil">Brazil
<OPTION VALUE="Canada">Canada
<OPTION VALUE="China">China
<OPTION VALUE="Cuba">Cuba
<OPTION VALUE="Cyprus">Cyprus
<OPTION VALUE="Japan">Japan
<OPTION VALUE="Korea">Korea
<OPTION VALUE="Philippines">Philippines
<OPTION VALUE="Spain">Spain
<OPTION VALUE="United States of America">United States of America

</SELECT>

i need a resuls page that sends an error if the user has not selected any thing

ths is what i have so far




// check list box 

echo "<BR><B>Country</B> is ";

cgraz

if your form method is set to post:

if( !isset( $_POST['country'] ) || empty( $_POST['country'] ) )
{
	echo 'Error: You must select a country.';
}
else
{
	echo 'Success: You selected a country.';
}

kof00

it doesn't seem to work even if i don't touch it says its a success

kof00

heres my code so far


<HTML>

<HEAD>
<TITLE>Anime Site Registration</TITLE>
</HEAD>

<BODY background="http://www.black-howling.com/images/wood1.gif">


<p align="center"><font size="14" color="black" face="serif">
Anime Form Sign Up</font></p>

<FORM METHOD="POST" ACTION="animeresults.php">



<BR><B>Name:</B>
<BR><INPUT TYPE="TEXT" NAME="username">
<BR>


<!-- radio button -->

<font size="5" color="black" face="serif">
<BR>Gender</font>
<BR><INPUT TYPE="RADIO" NAME="radiobutton"
   VALUE="Male">Male
<BR><INPUT TYPE="RADIO" NAME="radiobutton"
   VALUE="Female">Female
<BR>


<BR><B>Birthday</B>
<BR><INPUT TYPE="TEXT" NAME="birthday">
<BR>

<BR><B>Homeaddress</B>
<BR><INPUT TYPE="TEXT" NAME="homeaddress">
<BR>

<BR><B>City</B>
<BR><INPUT TYPE="TEXT" NAME="homecity">
<BR>

<BR><B>State</B>
<BR><INPUT TYPE="TEXT" NAME="homestate">
<BR>

<BR><B>Zip</B>
<BR><INPUT TYPE="TEXT" NAME="homezip">
<BR>



<!-- single select -->


<font size="5" color="black" face="serif">
<BR>Country</font>
<BR><SELECT NAME="country">
<OPTION VALUE="Nothing">-----Select Country-----
<OPTION VALUE="Brazil">Brazil
<OPTION VALUE="Canada">Canada
<OPTION VALUE="China">China
<OPTION VALUE="Cuba">Cuba
<OPTION VALUE="Cyprus">Cyprus
<OPTION VALUE="Japan">Japan
<OPTION VALUE="Korea">Korea
<OPTION VALUE="Philippines">Philippines
<OPTION VALUE="Spain">Spain
<OPTION VALUE="United States of America">United States of America

</SELECT>


<BR><B>House Phone</B>
<BR><INPUT TYPE="TEXT" NAME="phone">
<BR>

<BR><B>Cell Phone</B>
<BR><INPUT TYPE="TEXT" NAME="cell">
<BR>

<BR><B>Email</B>
<BR><INPUT TYPE="TEXT" NAME="email">
<BR>


<BR><B>Favorite Website</B>
<BR><INPUT TYPE="TEXT" NAME="website">
<BR>

<BR>
<BR><B>Comments</B>
<BR>
<TEXTAREA NAME="textarea" ROWS="8" COLS=50"
 WRAP="physical">
</TEXTAREA>



<!-- multiple select -->

<font size="5" color="black" face="serif">
<BR>Favorite Author</font>
<BR><SELECT MULTIPLE NAME="author[]">
<OPTION VALUE="Akamatsu Ken">Akamatsu Ken
<OPTION VALUE="Kaise Sosuke">Kaise Sousuke
<OPTION VALUE="Maki Yoko">Maki Yoko
<OPTION VALUE="Peach Pit">Peach Pit
<OPTION VALUE="Takahashi Rumiko">Takahashi Rumiko
<OPTION VALUE="Watsuki Nobuhiro">Watsuko Nobuhiro

</SELECT>

<BR>

<!-- check box -->


<font size="5" color="black" face="serif">
<BR>Favorite Anime</font>
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Clover">Clover
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Eureka 7">Eureka 7
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Evangelion">Evangelion
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Full Metal Panic">Full Metal Panic
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Kenshin">Kenshin
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Mars">Mars
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" value="Romeo X Juliet">Romeo X Juliet
<BR><INPUT TYPE="CHECKBOX" 
   NAME="show[]" vaule="Vandread">Vandread

<BR>





<INPUT TYPE=hidden NAME="martial" VALUE="Anime Form">

<?

echo "<input type=hidden name=ip value=\"$REMOTE_ADDR\">\n"; 
echo "<input type=hidden name=browser value=\"$HTTP_USER_AGENT\">\n";

?>

<BR>



<BR><INPUT TYPE="RESET" VALUE="clear all fields">
<BR>
<BR><INPUT TYPE="SUBMIT" Name="Submit" VALUE="Proccess Information">
<BR>


</FORM>
</BODY>
</HTML>

results page


<?php

 // File animeresults.php


 echo date("F j, Y, g:i a");
echo "<BR>";


     $errors=0;
     if (!trim($username))
     {
        echo "<BR><B>Username</B> is required.";
        $errors++;

     }


// Gender

echo "<BR><B>Gender</B> is ";
if (!$_REQUEST['radiobutton']) echo ("not selected."); 

switch ($_REQUEST['radiobutton']) 
{ 
case "Male" : echo "Male"; break; 

case "Female" : echo "Female"; break; 


} 



     if (!trim($birthday))
     {
        echo "<BR><B>Birthday</B> is required.";
        $errors++;

     }

 if (!trim($homeaddress))
     {
        echo "<BR><B>Home Address</B> is required.";
        $errors++;

 }

     if (!trim($homecity))
     {
        echo "<BR><B>City</B> is required.";
        $errors++;

     }


     if (!trim($homestate))
     {
        echo "<BR><B>State</B> is required.";
        $errors++;

     }


     if (!trim($homezip))
     {
        echo "<BR><B>Zip</B> is required.";
        $errors++;

     }


if ($errors > 0)
   echo "<BR><BR><BR>Please use your browser's back button ".
        "to return to the form, correct";
if ($errors == 1)
   echo "the error, ";
if ($errors > 1)
   echo "the errors, ";
if ($errors > 0)
   echo "and re-submit the form.";



?>

bradgrafelman

Since none of the OPTION's in your SELECT dropdown have the SELECTED property enabled, the default OPTION chosen will be the first one. Therefore, you need to check for the value of 'Nothing'.

Or, to get cgraz's code snippet to work, remove the value from this first OPTION element.

EDIT: Also note that the isset() bit in cgraz's code is not necessary.