Cannot modify header information - headers already sent by
Posted: Sat Apr 09, 2011 2:54 am
hi,i face some error..that is Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\nagels\saveComment.php:18) in C:\xampp\htdocs\nagels\saveComment.php on line 19
when the user is not the member,it pop out message to register a member but after i click ok button,it show the error above..isnt i use echo function,so get the error??
can anyone help me to check and correct it??tthanks in advance..
the one is saveComment.php
same problem i get that are Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\nagels\deleteComment.php:2) in C:\xampp\htdocs\nagels\application.php on line 2
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\nagels\deleteComment.php:2) in C:\xampp\htdocs\nagels\application.php on line 50
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\nagels\deleteComment.php:2) in C:\xampp\htdocs\nagels\application.php on line 51
before that i use like that,everything is ok..but recently i get this problem again..i already change and correct many time still same error.
what wrong wif my code??
the one is application.php
the one is deleteComment.php
when the user is not the member,it pop out message to register a member but after i click ok button,it show the error above..isnt i use echo function,so get the error??
can anyone help me to check and correct it??tthanks in advance..
the one is saveComment.php
Code: Select all
<?php
require_once 'config.php' ;
$id = $_REQUEST['id'];
$username = $_REQUEST["username"];
$comment = $_POST["comment"];
if ($id = $_REQUEST['id'])
{
$query = 'INSERT INTO comment set id = "' . mysql_real_escape_string($id) . '",
username = "' . mysql_real_escape_string($username) . '",
comment = "' . mysql_real_escape_string($comment) . '",date = "' . date('Y-m-d H:i:s') . '"';
$result = mysql_query($query);
header("Location:comment2.php");
}
else{
echo"<script>alert(\"Please register as member to comment\")</script>";
header("Location: register.php");
}
?>Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\nagels\deleteComment.php:2) in C:\xampp\htdocs\nagels\application.php on line 50
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\nagels\deleteComment.php:2) in C:\xampp\htdocs\nagels\application.php on line 51
before that i use like that,everything is ok..but recently i get this problem again..i already change and correct many time still same error.
what wrong wif my code??
the one is application.php
Code: Select all
<?php
session_start();
require_once 'config.php' ;
function redirect($url, $num = 307) {
static $http = array (
100 => "HTTP/1.1 100 Continue",
101 => "HTTP/1.1 101 Switching Protocols",
200 => "HTTP/1.1 200 OK",
201 => "HTTP/1.1 201 Created",
202 => "HTTP/1.1 202 Accepted",
203 => "HTTP/1.1 203 Non-Authoritative Information",
204 => "HTTP/1.1 204 No Content",
205 => "HTTP/1.1 205 Reset Content",
206 => "HTTP/1.1 206 Partial Content",
300 => "HTTP/1.1 300 Multiple Choices",
301 => "HTTP/1.1 301 Moved Permanently",
302 => "HTTP/1.1 302 Found",
303 => "HTTP/1.1 303 See Other",
304 => "HTTP/1.1 304 Not Modified",
305 => "HTTP/1.1 305 Use Proxy",
307 => "HTTP/1.1 307 Temporary Redirect",
400 => "HTTP/1.1 400 Bad Request",
401 => "HTTP/1.1 401 Unauthorized",
402 => "HTTP/1.1 402 Payment Required",
403 => "HTTP/1.1 403 Forbidden",
404 => "HTTP/1.1 404 Not Found",
405 => "HTTP/1.1 405 Method Not Allowed",
406 => "HTTP/1.1 406 Not Acceptable",
407 => "HTTP/1.1 407 Proxy Authentication Required",
408 => "HTTP/1.1 408 Request Time-out",
409 => "HTTP/1.1 409 Conflict",
410 => "HTTP/1.1 410 Gone",
411 => "HTTP/1.1 411 Length Required",
412 => "HTTP/1.1 412 Precondition Failed",
413 => "HTTP/1.1 413 Request Entity Too Large",
414 => "HTTP/1.1 414 Request-URI Too Large",
415 => "HTTP/1.1 415 Unsupported Media Type",
416 => "HTTP/1.1 416 Requested range not satisfiable",
417 => "HTTP/1.1 417 Expectation Failed",
500 => "HTTP/1.1 500 Internal Server Error",
501 => "HTTP/1.1 501 Not Implemented",
502 => "HTTP/1.1 502 Bad Gateway",
503 => "HTTP/1.1 503 Service Unavailable",
504 => "HTTP/1.1 504 Gateway Time-out"
);
header($http[$num]);
header("Location: $url");
exit;
}
//SELECT SQL_CALC_FOUND_ROWS name, email FROM users WHERE name LIKE 'a%' LIMIT 10;
//SELECT FOUND_ROWS();
function db_query_with_size($query)
{
#add SQL_CALC_FOUND_ROWS
$query = str_replace("SELECT", "SELECT SQL_CALC_FOUND_ROWS", strtoupper($query));
$results = db_query($query);
$result = db_query("SELECT FOUND_ROWS()");
$result = mysql_fetch_row($result);
return array("result" => $results, "size" => $result[0]);
}
function set_flash_note($message)
{
$_SESSION["flash_note"] = $message;
}
function get_flash_note()
{
$note = $_SESSION['flash_note'];
unset($_SESSION['flash_note']);
return $note;
}
function get_id()
{
return mysql_insert_id();
}
function findexts($filename)
{
$filename = strtolower($filename) ;
$exts = explode(".", $filename) ;
$n = count($exts)-1;
$exts = $exts[$n];
return $exts;
}
function is_login()
{
if(array_key_exists('login',$_SESSION) && $_SESSION['login'] )
return true;
return false;
}
?>Code: Select all
<?php
session_start();
require_once 'config.php';
require_once 'application.php' ;
$comment_id=$_REQUEST['comment_id'];
$id=$_SESSION['id'];
$sql = 'DELETE * FROM comment WHERE comment_id="$comment_id", id="$id"';
mysql_query( $sql);
redirect("comment2.php");
?>