[es] - Problem sa anketom

KumRusvelt
Božidar Mirković
Beograd, Srbija

Član broj: 248295
Poruke: 18
*.dynamic.isp.telekom.rs.

Profil

^{24.12.2010. u 18:04 - pre 162 meseci}

Pozdrav svima, pre nekoliko dana skinuo sam tutorijal koji obrađuje anketu, urađen je u kombinaciji sa jqueri
plug in-om i pratećom js skriptom što daje prilično dobru animaciju anketnog rezultata, ali kada simuliram prosleđivanje
upita javlja mi upozorenje ovoga tipa: Warning: Cannot modify header information - headers already sent by
(output started at C:\xampp\htdocs\mysite\poll.php:2) in C:\xampp\htdocs\mysite\poll.php on line 42
poll.php skripta izgleda ovako:

Code:
<?php
//Update database information according to your server settings
$conn=mysql_connect('localhost', 'root', '') or die("Can't connect to mysql host");
//Select the database to use
mysql_select_db('mysite') or die("Can't connect to DB");
if(!$_POST['poll'] || !$_POST['pollid']){
    $query=mysql_query("SELECT id, ques FROM questions ORDER BY id DESC LIMIT 1");
    while($row=mysql_fetch_assoc($query)){
        //display question
        echo "<p class=\"pollques\" >".$row['ques']."</p>";
        $poll_id=$row['id'];
    }
    if($_GET["result"]==1 || $_COOKIE["voted".$poll_id]=='yes'){
        //if already voted or asked for result
        showresults($poll_id);
        exit;
    }
    else{
    //display options with radio buttons
        $query=mysql_query("SELECT id, value FROM options WHERE ques_id=$poll_id");
        if(mysql_num_rows($query)){
            echo '<div id="formcontainer" ><form method="post" id="pollform" action="'.$_SERVER['PHP_SELF'].'" >';
            echo '<input type="hidden" name="pollid" value="'.$poll_id.'" />';
            while($row=mysql_fetch_assoc($query)){
                echo '<p><input type="radio" name="poll" value="'.$row['id'].'" id="option-'.$row['id'].'" />
                <label for="option-'.$row['id'].'" >'.$row['value'].'</label></p>';
            }
            echo '<p><input type="submit"  value="Submit" /></p></form>';
            echo '<p><a href="'.$_SERVER['PHP_SELF'].'?result=1" id="viewresult">View result</a></p></div>';
        }
    }
}
else{
    if($_COOKIE["voted".$_POST['pollid']]!='yes'){

        //Check if selected option value is there in database?
        $query=mysql_query("SELECT * FROM options WHERE id='".intval($_POST["poll"])."'");
        if(mysql_num_rows($query)){
            $query="INSERT INTO votes(option_id, voted_on, ip) VALUES('".$_POST["poll"]."', '".date('Y-m-d H:i:s')."', '".$_SERVER['REMOTE_ADDR']."')";
            if(mysql_query($query))
            {
                //Vote added to database
                setcookie("voted".$_POST['pollid'], 'yes', time()+86400*300);
            }
            else
                echo "There was some error processing the query: ".mysql_error();
        }
    }
    showresults(intval($_POST['pollid']));
}
function showresults($poll_id){
    global $conn;
    $query=mysql_query("SELECT COUNT(*) as totalvotes FROM votes WHERE option_id IN(SELECT id FROM options WHERE ques_id='$poll_id')");
    while($row=mysql_fetch_assoc($query))
        $total=$row['totalvotes'];
    $query=mysql_query("SELECT options.id, options.value, COUNT(*) as votes FROM votes, options WHERE votes.option_id=options.id AND votes.option_id IN(SELECT id FROM options WHERE ques_id='$poll_id') GROUP BY votes.option_id");
    while($row=mysql_fetch_assoc($query)){
        $percent=round(($row['votes']*100)/$total);
        echo '<div class="option" ><p>'.$row['value'].' (<em>'.$percent.'%, '.$row['votes'].' votes</em>)</p>';
        echo '<div class="bar ';
        if($_POST['poll']==$row['id']) echo ' yourvote';
        echo '" style="width: '.$percent.'%; " ></div></div>';
    }
    echo '<p>Total Votes: '.$total.'</p>';
}
?>

Napomenuo bih da je linija 42 poll.php
setcookie("voted".$_POST['pollid'], 'yes', time()+86400*300);
A izdvojio sam iz left_template.php deo vezan za anketu

Code:
<link rel="stylesheet" type="text/css" href="styles.css" />
<script type="text/javascript" src="js/jquery-1.3.2.js" ></script>
<script type="text/javascript" >
$(function(){
    var loader=$('#loader');
    var pollcontainer=$('#pollcontainer');
    loader.fadeIn();
    //Load the poll form
    $.get('poll.php', '', function(data, status){
        pollcontainer.html(data);
        animateResults(pollcontainer);
        pollcontainer.find('#viewresult').click(function(){
            //if user wants to see result
            loader.fadeIn();
            $.get('poll.php', 'result=1', function(data,status){
                pollcontainer.fadeOut(1000, function(){
                    $(this).html(data);
                    animateResults(this);
                });
                loader.fadeOut();
            });
            //prevent default behavior
            return false;
        }).end()
        .find('#pollform').submit(function(){
            var selected_val=$(this).find('input[name=poll]:checked').val();
            if(selected_val!=''){
                //post data only if a value is selected
                loader.fadeIn();
                $.post('poll.php', $(this).serialize(), function(data, status){
                    $('#formcontainer').fadeOut(100, function(){
                        $(this).html(data);
                        animateResults(this);
                        loader.fadeOut();
                    });
                });
            }
            //prevent form default behavior
            return false;
        });
        loader.fadeOut();
    });

    function animateResults(data){
        $(data).find('.bar').hide().end().fadeIn('slow', function(){
                            $(this).find('.bar').each(function(){
                                var bar_width=$(this).css('width');
                                $(this).css('width', '0').animate({ width: bar_width }, 1000);
                            });
                        });
    }

});
</script>

    <div id="container" >
        <h1>User Poll</h1>
        <div id="pollcontainer" >
        </div>
        <p id="loader" >Loading...</p>
    </div>

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