Cannot modify header information error when trying to redirect page

Question

I'm following this video tutorial and have become stumped on the part where the login page redirects the user to home.php from index.php. When the user clicks login the credentials are checked and when the head function is called this error pops up:

"Warning: Cannot modify header information - headers already sent by (output started at /home/urbanas8/public_html/register/index.php:19299) in /home/urbanas8/public_html/register/inc/header.inc.php on line 22"

Line 19299 is just

<?php require_once("./inc/header.inc.php");?>

and line 22 is

header("location: home.php");

here is the header.inc.php file:

<?php 
            session_start();
            ini_set('display_errors', 1);
            error_reporting(E_ALL);
            require_once( "./inc/connect.inc.php" );


            if(isset($_POST['login'])){                 
                $user_login = strip_tags(@$_POST['user_login']);
                $password_login = strip_tags(@$_POST['login_password']);

                $password_login = md5($password_login);

                $sql = mysql_query("SELECT id FROM users WHERE email='$user_login' AND password='$password_login' LIMIT 1");
                $userCount = mysql_num_rows($sql);
                if($userCount == 1){
                    while($row = mysql_fetch_array($sql)){
                        $id = $row["id"];
                    }
                    //echo("pass");
                    //$_SESSION['user_login'] = $user_login;
                    header("location: home.php");
                    exit();
                }else {
                    echo("/invalid username/password");
                    exit();
                }
            }
    ?>
        <div id="top-bar">
            <div class="container">
                <div class="row">
                    <div class="col-sm-12">
                        <ul id="top-info">
                            <li>Phone: 703-518-4325</li>
                            <li>Email: <a href="mailto:info@urbanare.com">info@urbanare.com</a></li>
                        </ul>
                        <ul class="nav pull-right" id="top-buttons" style="line-height:10px !important;">
                            <li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown"><i class="fa fa-sign-in"></i>Log in<strong class="caret"></strong></a></a>
                                <ul id="login-dp" class="dropdown-menu" style="padding: 15px;">
                                    <form action="" method="POST" accept-charset="UTF-8">
                                        email: <input id="user_username" style="margin-bottom: 15px;" type="text" name="user_login" size="30" />
                                        password: <input id="user_password" style="margin-bottom: 15px;" type="password" name="login_password" size="30" />
                                        <input id="user_remember_me" style="float: left; margin-right: 10px;" type="checkbox" name="remember" value="1" />
                                        <label class="string optional" for="user_remember_me"> Remember me</label>
                                        <input class="btn btn-primary" style="clear: left; width: 100%; height: 32px; font-size: 13px;" type="submit" name="login" value="Sign In" />
                                    </form>
                                </ul>
                            </li>

                            <li class="divider"></li>

                            <li><a href="../register"><i class="fa fa-pencil-square-o"></i> Register</a></li>
                        </ul>
                    </div>
                </div>
            </div>
        </div>

        <div class="sticky-wrapper"><div id="nav-section">
            <div class="container">
                <div class="row">
                    <div class="col-sm-12">
                        <a href="http://comingsoon.safepropserv.com/landing/index.html" class="nav-logo"><img src="./files/logo_transparent.png" alt="UrbanaRE Logo"></a>

                        <!-- BEGIN SEARCH -->
                        <div id="sb-search" class="sb-search">
                            <form>
                                <input class="sb-search-input" placeholder="Search..." type="text" value="" name="search" id="search">
                                <input class="sb-search-submit" type="submit" value="">
                                <i class="fa fa-search sb-icon-search"></i>
                            </form>
                        </div>
                        <!-- END SEARCH -->

                        <!-- BEGIN MAIN MENU -->
                        <nav class="navbar">
                            <button id="nav-mobile-btn"><i class="fa fa-bars"></i></button>

                            <ul class="nav navbar-nav">
                                <li class="dropdown">
                                    <a href="./files/UrbanaRE -- Property Info.html" data-toggle="dropdown" data-hover="dropdown">Home<b class="caret"></b></a>
                                    <ul class="dropdown-menu">
                                        <li><a href="http://comingsoon.safepropserv.com/landing/index.html">Home Search</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/index-slider.html">Home Slider</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/index-grid.html">Home Grid</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/index-map.html">Home Map</a></li>
                                    </ul>
                                </li>

                                <li class="dropdown">
                                    <a href="./files/UrbanaRE -- Property Info.html" data-toggle="dropdown" data-hover="dropdown">Properties<b class="caret"></b></a>
                                    <ul class="dropdown-menu">
                                        <li><a href="http://comingsoon.safepropserv.com/landing/properties-detail.html">Properties Detail</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/properties-list.html">Properties List</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/properties-grid.html">Properties Grid</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/properties-grid2.html">Properties Grid 2</a></li>
                                    </ul>
                                </li>

                                <li class="dropdown">
                                    <a class="dropdown" href="./files/UrbanaRE -- Property Info.html" data-toggle="dropdown" data-hover="dropdown">Pages<b class="caret"></b></a>
                                    <ul class="dropdown-menu">
                                        <li><a href="http://comingsoon.safepropserv.com/landing/about.html">About Us</a></li>
                                        <li class="dropdown-submenu">
                                            <a href="./filse/UrbanaRE -- Property Info.html">Agency</a>
                                            <ul class="dropdown-menu">
                                                <li><a href="http://comingsoon.safepropserv.com/landing/agency-detail.html">Agency Detail</a></li>
                                                <li><a href="http://comingsoon.safepropserv.com/landing/agency-listing.html">Agency Listing</a></li>
                                            </ul>
                                        </li>
                                        <li class="dropdown-submenu">
                                            <a href="./files/UrbanaRE -- Property Info.html">Agent</a>
                                            <ul class="dropdown-menu">
                                                <li><a href="http://comingsoon.safepropserv.com/landing/agent-detail.html">Agent Detail</a></li>
                                                <li><a href="http://comingsoon.safepropserv.com/landing/agent-listing.html">Agent Listing</a></li>
                                            </ul>
                                        </li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/pricing-tables.html">Pricing Tables</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/login.html">Login</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/register.html">Register</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/faq.html">FAQ</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/404.html">404</a></li>

                                        <li class="divider"></li>
                                        <li><a tabindex="-1" href="./files/UrbanaRE -- Property Info.html"> Separated link </a></li>
                                    </ul>
                                </li>

                                <li class="dropdown">
                                    <a href="./files/UrbanaRE -- Property Info.html" data-toggle="dropdown" data-hover="dropdown">Blog<b class="caret"></b></a>
                                    <ul class="dropdown-menu">
                                        <li><a href="http://comingsoon.safepropserv.com/landing/blog-detail.html">Blog Detail</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/blog-listing1.html">Blog Listing 1</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/blog-listing2.html">Blog Listing 2</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/blog-listing3.html">Blog Listing 3</a></li>
                                        <li><a href="http://comingsoon.safepropserv.com/landing/blog-listing4.html">Blog Listing 4</a></li>
                                    </ul>
                                </li>

                                <li><a href="http://comingsoon.safepropserv.com/landing/contacts.html">Contacts</a></li>
                            </ul>

                        </nav>
                        <!-- END MAIN MENU -->

                    </div>
                </div>
            </div>
        </div></div>

    <!-- END HEADER -->

did you try with two dots... I am not confirmed about this but i think it would be like — habib ul haq, Jun 19 '15 at 05:58
try to use `mysqli` instead of `mysql` to prevent hijacking... — Bruce, Jun 19 '15 at 06:00
kindly remove unwanted spaces from your code (insed the ``) and try again. — Ambal Mani, Jun 19 '15 at 06:06
it is referencing the right directory. When I add another dot the page doesnt even load. — Michael Collins, Jun 19 '15 at 06:08
just put `ob_start()` at very first line of `header.inc.php` — Shravan Sharma, Jun 19 '15 at 06:11
possible duplicate of [Reference - What does this error mean in PHP?](http://stackoverflow.com/questions/12769982/reference-what-does-this-error-mean-in-php) — rnevius, Jun 19 '15 at 06:12
dupe http://stackoverflow.com/questions/11384416/cant-use-ini-set-because-session-is-active you can't change ini settings after starting the session. — bassxzero, Jun 19 '15 at 06:13

Tufan Barış Yıldırım · Answer 1 · 2015-06-19T06:19:57.963

1

According to the error message you shared.

The output is started at "index.php:19299" (before including header.inc.php)

if you dont have any space (before ob_start(); at first line of your index.php file.

<?php ob_start();

edited Jun 19 '15 at 06:19

answered Jun 19 '15 at 06:10

Tufan Barış Yıldırım

3,832
24
34

are you sure that index.php is your first running file? if so, read this answer : http://stackoverflow.com/questions/8028957/how-to-fix-headers-already-sent-error-in-php – Tufan Barış Yıldırım Jun 19 '15 at 07:31

score 1 · Answer 2 · answered Jun 19 '15 at 06:12

1

You should try comment below lines:

  //       ini_set('display_errors', 1);
     //       error_reporting(E_ALL);

Or you should check there should nothing echo in header. because this error mostly occurs when something is echoing before the header redirect.

answered Jun 19 '15 at 06:12

Vishal J

328
3
9

Ok it is showing blank because you have disable showing error. Please check in this file require_once( "./inc/connect.inc.php" ); if something is being echo there. if it is then comment that echo and try. – Vishal J Jun 19 '15 at 07:54

score 0 · Answer 3 · answered Jun 19 '15 at 06:49

0

Removed session_start(); from the header and put it at the top of the index file... 3 hours later.

answered Jun 19 '15 at 06:49

Michael Collins

308
1
2
17

Cannot modify header information error when trying to redirect page

3 Answers3