OS:Xp, PHP4, NoDB
Objective: A Simple Poll that will keep numeric track of students who like school and who don't like school.

I am having 2 problems. The 1st problem: The program is allowing the user to choose both Yes and No questions. I thought with radio buttons only 1 choice can be made?

The 2nd problem is that I am unable to keep track of the poll using the $YES and $NO variables.

Here is the form:
<h1><center>Here Is A Simple Poll</center></h1>

<br /><h3>Do you like school?</h3>

<FORM METHOD = "POST" ACTION = "poll_results.php"
<br /><INPUT TYPE = "RADIO" NAME = "YES" VALUE = "ido"> YES
<br /><INPUT TYPE = "RADIO" NAME = "NO" VALUE = "idonot"> NO

<br /><INPUT TYPE = "SUBMIT" VALUE = "Send Your Vote">
</FORM>

Here is the PHP Script:
<?
$Yes = 0;
$NO = 0;
if ($_POST["YES"])
{
$Yes++;
echo "<br>I am glad you like school";
echo $Yes;
}
else ($_POST["NO"])
{
$NO++;
echo "<br>I am sorry you don't like school";
echo $NO;
}
?>

The first problem I see is that only 1 person at a time can like or dislike school. Your $Yes and $NO variables are both set to zero when the page is loaded. Only one of them is incremented and then the information is not saved. That means when the next person votes in your poll $Yes and $NO will be once again set to 0 and only one of them will be incremented . You must save the value in a database of some sort and retrieve it from the database.

Your second problem is that you have two radio buttons with DIFFERENT names. You must name them the same thing so only 1 option can be selected.

Wrong

<br /><INPUT TYPE = "RADIO" NAME = "YES" VALUE = "ido"> YES
<br /><INPUT TYPE = "RADIO" NAME = "NO" VALUE = "idonot"> NO

Right

<br /><INPUT TYPE = "RADIO" NAME = "school" VALUE = "ido"> YES
<br /><INPUT TYPE = "RADIO" NAME = "school" VALUE = "idonot"> NO

The way for a radio button to work with only allowing either one or the other option to to assign then the same input name. The values are what is used to determine the choice selected.

<input type="radio" name="school" value="yes" /><br />
<input type="radio" name="school" value="no" /><br />

With the php, you should check if the post form value is set, and then evaluate one or default to the other according to selection. Also you were assigning a value of "0" to both vars $YES and $NO and then increasing the amount to "1". If you want to store the values in a flat text file instead of a database, first you would need to read the current values of each and then increment that number.

PHP Code:

<?php
  
  $YES = ''; // Value from text file
  $NO  = ''; // Value from text file
  
  if (isset($_POST['school'])) {
    
    if ($_POST['school'] == 'yes') {
      
      $YES++;
      echo '<br />I am glad you like school ' . $YES;
      
    } else {
      
      $NO++;
      echo '<br />I am sorry you don\'t like school ' . $NO;
    }
  }
  
?>

hey friend,
that's what u wrote, but it's wrong:

<br /><INPUT TYPE = "RADIO" NAME = "YES" VALUE = "ido"> YES
<br /><INPUT TYPE = "RADIO" NAME = "NO" VALUE = "idonot"> NO

in fact what u need to write is that:

<br /><INPUT TYPE = "RADIO" NAME = "TEST" VALUE = "ido"> YES
<br /><INPUT TYPE = "RADIO" NAME = "TEST" VALUE = "idonot"> NO

both radio have the same name

Well I personally would go for a simpler way

<INPUT TYPE = "RADIO" NAME = "YES" VALUE = "ido">
<INPUT TYPE = "RADIO" NAME = "NO" VALUE = "idonot">
should be

<INPUT TYPE = "RADIO" NAME = "poll" VALUE = "1">
<INPUT TYPE = "RADIO" NAME = "poll" VALUE = "0">

Then you can quite easily keep counting this by

switch($_GET['poll']){
case 1:
$sql = "update poll set yes=yes+1";
break;
case 0:
$sql = "update poll set no=no+1";
break;
}

This now allows you to retrive a simple value for yes and no and you can easily build a graph upon these yes and no values.

Ibbo

May be you need online poll builder?
You can see it here Online Survey Research..

If you want to develop vote script, you need some storage like a text file or database (mysql). If you will use text file, don't forget to use file locking mechanizm