Efter form submit send til bestemt side
Hey jeg har her en kode jeg meget gerne vil have tilføjet en funktion til når man har submitted en besked bliver sendt tilbage til oversigtet over beskeder. lige nu viser den bare en blank side.Eller rettet sagt, det gjorde den på det andet domæne jeg havde det liggende på, nu skriver den:
Warning: Cannot modify header information - headers already sent by (output started at /var/www/www.haikumusic.dk/www/index_.php:6) in /var/www/www.haikumusic.dk/www/index_.php on line 503
Men håbede lidt at det var noget med at den ikke redirectede til den rigtige side.
Beskederne bliver oprettet selvom der kommer fejl.
<?
if ($side == "guestbook") {
?>
</span>
<table width="100%" border="0" class="Main_Text">
<tr>
<td><p>
<?php
// include the database configuration and
// open connection to database
include 'library/config.php';
include 'library/opendb.php';
// check if the form is submitted
if(isset($_POST['btnSign']))
{
// get the input from $_POST variable
// trim all input to remove extra spaces
$name = trim($_POST['txtName']);
$email = trim($_POST['txtEmail']);
$url = trim($_POST['txtUrl']);
$message = trim($_POST['mtxMessage']);
$calculate = trim($_POST['txtcalculate']);
// escape the message ( if it's not already escaped )
if(!get_magic_quotes_gpc())
{
$name = addslashes($name);
$message = addslashes($message);
$calculate = addslashes($calculate);
}
// if the visitor do not enter the url
// set $url to an empty string
if ($url == 'http://')
{
$url = '';
}
// prepare the query string
$query = "INSERT INTO guestbook (name, email, url, message, calculate, entry_date) " .
"VALUES ('$name', '$email', '$url', '$message', '$calculate', current_date)";
// execute the query to insert the input to database
// if query fail the script will terminate
mysql_query($query) or die('Error, query failed. ' . mysql_error());
// redirect to current page so if we click the refresh button
// the form won't be resubmitted ( as that would make duplicate entries )
header('Location: ' . $_SERVER['REQUEST_URI']);
// force to quite the script. if we don't call exit the script may
// continue before the page is redirected
exit;
}
?>
<script language="JavaScript">
/*
This function is called when
the 'Sign Guestbook' button is pressed
Output : true if all input are correct, false otherwise
*/
function checkForm()
{
// the variables below are assigned to each
// form input
var gname, gemail, gurl, gmessage, gcalculate;
with(window.document.guestform)
{
gname = txtName;
gemail = txtEmail;
gurl = txtUrl;
gmessage = mtxMessage;
gcalculate = txtCalculate;
}
// if name is empty alert the visitor
if(trim(gname.value) == '')
{
alert('Please enter your name');
gname.focus();
return false;
}
// alert the visitor if email is empty or the format is not correct
else if(trim(gemail.value) != '' && !isEmail(trim(gemail.value)))
{
alert('Please enter a valid email address or leave it blank');
gemail.focus();
return false;
}
// alert the visitor if message is empty
else if(trim(gmessage.value) == '')
{
alert('Please enter your message');
gmessage.focus();
return false;
}
// if calculate is empty alert the visitor
else if(trim(gcalculate.value) == '')
{
alert('Please do the calculation');
gcalculate.focus();
return false;
}
else if(trim(gcalculate.value)!="2"){
alert('The calculation was incorrect!');
gcalculate.focus();
return false;
}
else
{
// when all input are correct
// return true so the form will submit
return true;
}
}
/*
Strip whitespace from the beginning and end of a string
Input : a string
Output : the trimmed string
*/
function trim(str)
{
return str.replace(/^\s+|\s+$/g,'');
}
/*
Check if a string is in valid email format.
Input : the string to check
Output : true if the string is a valid email address, false otherwise.
*/
function isEmail(str)
{
var regex = /^[-_.a-z0-9]+@(([-a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
return regex.test(str);
}
</script>
</p>
<form method="post" name="guestform">
<table width="755" border="0" cellpadding="2" cellspacing="1">
<tr>
<td width="71">Name *</td>
<td width="673">
<input name="txtName" type="text" id="txtName" size="30" maxlength="30"></td>
</tr>
<tr>
<td width="71">Email</td>
<td>
<input name="txtEmail" type="text" id="txtEmail" size="30" maxlength="50"></td>
</tr>
<tr>
<td width="71">Website URL</td>
<td>
<input name="txtUrl" type="text" id="txtUrl" value="http://" size="30" maxlength="50"></td>
</tr>
<tr>
<td width="71">Message *</td>
<td>
<textarea name="mtxMessage" cols="79" rows="5" id="mtxMessage"></textarea></td>
</tr>
<tr>
<td width="71"> </td>
<td><strong>Calculate this: 1+1=?</strong></td>
</tr>
<tr>
<td> </td>
<td><input name="txtCalculate" type="text" id="txtcalculate" size="30" maxlength="30" /></td>
</tr>
<tr>
<td> </td>
<td><input name="btnSign" type="submit" id="btnSign" value="Sign guestbook" onclick="return checkForm();" /></td>
</tr>
</table>
</form>
<?php
// =======================
// Show guestbook entries
// =======================
// how many guestbook entries to show per page
$rowsPerPage = 10;
// by default we show first page
$pageNum = 1;
// if $_GET['page'] defined, use the value as page number
if(isset($_GET['page']))
{
$pageNum = $_GET['page'];
}
// counting the offset ( where to start fetching the entries )
$offset = ($pageNum - 1) * $rowsPerPage;
// prepare the query string
$query = "SELECT id, name, email, url, message, DATE_FORMAT(entry_date, '%d.%m.%Y') ".
"FROM guestbook ".
"ORDER BY id DESC ". // using ORDER BY to show the most current entry first
"LIMIT $offset, $rowsPerPage"; // LIMIT is the core of paging
// execute the query
$result = mysql_query($query) or die('Error, query failed. ' . mysql_error());
// if the guestbook is empty show a message
if(mysql_num_rows($result) == 0)
{
?>
<p> Guestbook is empty </p>
<?php
}
else
{
// get all guestbook entries
while($row = mysql_fetch_array($result))
{
// list() is a convenient way of assign a list of variables
// from an array values
list($id, $name, $email, $url, $message, $date) = $row;
// change all HTML special characters,
// to prevent some nasty code injection
$name = htmlspecialchars($name);
$message = htmlspecialchars($message);
// convert newline characters ( \n OR \r OR both ) to HTML break tag ( <br> )
$message = nl2br($message);
?>
<table width="550" border="0" cellpadding="0" cellspacing="0" class="Main_Text">
<tr>
<td width="80" align="left"> <a href="mailto:<?=$email;?>" class="email">
<?=$name;?>
</a> </td>
<td align="right"><small>
<?=$date;?>
</small></td>
</tr>
<tr>
<td colspan="2">
<?=$message;?>
<?php
// if the visitor input her homepage url show it
if($url != '')
{
// make the url clickable by formatting it as HTML link
$url = "<a href='$url' target='_blank'>$url</a>";
?>
<br> <small>Homepage : <?=$url;?>
</small>
<?php
}
?>
<br />
<img src="dots.gif" /> </td>
</tr>
</table>
<br>
<?php
} // end while
// below is the code needed to show page numbers
// count how many rows we have in database
$query = "SELECT COUNT(id) AS numrows FROM guestbook";
$result = mysql_query($query) or die('Error, query failed. ' . mysql_error());
$row = mysql_fetch_array($result, MYSQL_ASSOC);
$numrows = $row['numrows'];
// how many pages we have when using paging?
$maxPage = ceil($numrows/$rowsPerPage);
$nextLink = '';
// show the link to more pages ONLY IF there are
// more than one page
if($maxPage > 1)
{
// this page's path
$self = $_SERVER['PHP_SELF'];
// we save each link in this array
$nextLink = array();
// create the link to browse from page 1 to page $maxPage
for($page = 1; $page <= $maxPage; $page++)
{
$nextLink[] = "<a href=\"$self?side=guestbook&page=$page\">$page</a>";
}
// join all the link using implode()
$nextLink = "Go to page : " . implode(' » ', $nextLink);
}
// close the database connection since
// we no longer need it
include 'library/closedb.php';
?>
<table width="550" border="0" cellpadding="2" cellspacing="0">
<tr>
<td align="right" class="text">
<?=$nextLink;?> </td>
</tr>
</table>
<?php
}
?>
</div>
<span class="style17"></span></td>
</tr>
</table>
<?
}
?>
