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I have encountering a problem..

It outputted an error : Cannot modify header information..

What would be the cause? And how could i fix it.. Thanks for the help.. I've check all, but then still I cannot fix it. What would be the problem?

Here is my code below: 

<!DOCTYPE html>
<html dir="ltr" lang="en-US"><head><!-- Created by Artisteer v4.3.0.60747 -->
    <meta charset="utf-8">
    <title>Home</title>
    <meta name="viewport" content="initial-scale = 1.0, maximum-scale = 1.0, user-scalable = no, width = device-width">

    <link rel="stylesheet" href="style.css" media="screen">
    <link rel="stylesheet" href="style.responsive.css" media="all">
<link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Salsa|PT+Sans&amp;subset=latin">

    <script src="jquery.js"></script>
    <script src="script.js"></script>
    <script src="script.responsive.js"></script>


<script>jQuery(function ($) {
    'use strict';
    if ($.fn.themeSlider) {
        $(".art-slidecontainera65d557e889141cb8638b82feda1c335").each(function () {
            var slideContainer = $(this), tmp;
            var inner = $(".art-slider-inner", slideContainer);
            inner.children().filter("script").remove();
            var helper = null;

            if ($.support.themeTransition) {
                helper = new BackgroundHelper();
                helper.init("fade", "next", $(".art-slide-item", inner).first().css($.support.themeTransition.prefix + "transition-duration"));
                inner.children().each(function () {
                    helper.processSlide($(this));
                });


            } else if (browser.ie && browser.version <= 8) {
                var slidesInfo = {
".art-slidea65d557e889141cb8638b82feda1c3350": {
    "bgimage" : "url('images/slidea65d557e889141cb8638b82feda1c3350.jpg')",
    "bgposition": "0 0",
    "images": "",
    "positions": ""
},
".art-slidea65d557e889141cb8638b82feda1c3351": {
    "bgimage" : "url('images/slidea65d557e889141cb8638b82feda1c3351.jpg')",
    "bgposition": "0 0",
    "images": "",
    "positions": ""
}
                };
                $.each(slidesInfo, function(selector, info) {
                    processElementMultiplyBg(slideContainer.find(selector), info);
                });
            }

            inner.children().eq(0).addClass("active");
            slideContainer.themeSlider({
                pause: 2600,
                speed: 600,
                repeat: true,
                animation: "fade",
                direction: "next",
                navigator: slideContainer.siblings(".art-slidenavigatora65d557e889141cb8638b82feda1c335"),
                helper: helper
            });


        });
    }
});
</script></head>
<body>
<div id="art-main">
<header class="art-header">

    <div class="art-shapes">

            </div>

<h1 class="art-headline">
    <a href="index.php">FPES</a>
</h1>
<h2 class="art-slogan">Faculty Performance Evaluation System.</h2>

<?php  
//connect to the database 
$connect = mysql_connect("localhost","root",""); 
mysql_select_db("db_fpes",$connect); //select the table

if(isset($_POST['btn_submit'])){
    $username = $_POST['username'];
    $password = $_POST['pass'];
    $result  = mysql_query ("SELECT * FROM professors where fac_stat = 1 and Faculty_code = '".$username."' and Faculty_code = '".$password."' ");
    if($username == 'admin' && $password == 'admin' && mysql_num_rows($result) == 0 ){
                header('Location: admin/home.php'); die;
    }
    else
    {
            $row = mysql_fetch_assoc($result);
            if($row['system_user'] == 1){
                header('Location: Grading/index.php'); die;
            }
            else if($row['system_user'] == 2){
                header('Location: Secretary/home.php'); die;
            }
            else
                header('Location: index.php');  die;
    }
}
?>
<nav class="art-nav">
    <ul class="art-hmenu"><li><a href="home.html" class="active">Home</a></li>
    <li><a href="add-profile.html">About Us</a></li>

</ul> 
</nav>
</header>
<div class="art-sheet clearfix">
            <div class="art-layout-wrapper">
                <div class="art-content-layout">
                    <div class="art-content-layout-row">
                        <div class="art-layout-cell art-content"><article class="art-post art-article">                           
                <div class="art-postcontent art-postcontent-0 clearfix"><div class="art-content-layout-wrapper layout-item-0">
<div class="art-content-layout layout-item-1">
    <div class="art-content-layout-row">
    <div class="art-layout-cell layout-item-2" style="width: 100%" >
        <p></p><div id="a65d557e889141cb8638b82feda1c335" style="position: relative; display: inline-block; z-index: 0; margin: 0px;  border-width: 0px;  " class="art-collage">
<div class="art-slider art-slidecontainera65d557e889141cb8638b82feda1c335" data-width="900" data-height="287">
    <div class="art-slider-inner">
<div class="art-slide-item art-slidea65d557e889141cb8638b82feda1c3350" >


</div>
<div class="art-slide-item art-slidea65d557e889141cb8638b82feda1c3351" >


</div>

    </div>
</div>
<div class="art-slidenavigator art-slidenavigatora65d557e889141cb8638b82feda1c335" data-left="1" data-top="1">
<a href="#" class="art-slidenavigatoritem"></a><a href="#" class="art-slidenavigatoritem"></a>
</div>



    </div>


        <p>
        </p><p>
        </p>
    </div>
    </div>
</div>
</div>
<div class="art-content-layout layout-item-1">
    <div class="art-content-layout-row">
    <div class="art-layout-cell layout-item-3" style="width: 67%" >
        <h2><span style="color: rgb(128, 0, 0); line-height: 51px; font-size: 40px;">Welcome&nbsp</span><span style="color: rgb(108, 127, 147); line-height: 31px; font-size: 28px;">to our site!</span></h2>
        <h3><img width="250" height="195" alt="" src="images/1037312_small500.jpg" style="float: left; margin-right: 15px;" class="">Performance Faculty Evalutaion System.&nbsp;</h3>
        <p>Insert Description Here!.<br></p>
    </div>

    <div class="art-layout-cell layout-item-4" style="width: 33%" >
    <form method = "post" action = "">
        <h1>Please Login<br></h1><p style="margin-top: 10px;"> Username: <input type="text" name = "username" >&nbsp;</p><p>
        <p> Password: <input type="text" name = "pass"></p><p style="text-align: right;">&nbsp;
        <input type = "submit" name = "btn_submit" class="art-button" value = "Login"/><br></p>
    </form>
    </div>
    </div>
</div>



</article></div>
                    </div>
                </div>
            </div>
    </div>
<footer class="art-footer">
  <div class="art-footer-inner">
<p>GoMiracles © 2014 - 2015. All Rights Reserved.<br></p>
  </div>
</footer>

</div>


</body></html>
Jeser Caneo
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    possible duplicate of [How to fix "Headers already sent" error in PHP](http://stackoverflow.com/questions/8028957/how-to-fix-headers-already-sent-error-in-php) – Sojan Jose Jan 07 '15 at 08:20
  • If this is all the code then make sure your file is **not** encoded as UTF-8 with BOM. The BOM (byte order mark) is a sequence of (invisible) characters inserted by editors at the very beginning of the file (before ` – axiac Jan 07 '15 at 08:26
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    Wait I will edit it with all my codes.. – Jeser Caneo Jan 07 '15 at 08:27
  • Also make sure that there is no output before you use the header() function. – Peter Jan 07 '15 at 08:31
  • @JeserCaneo I updated my answer with a fix specifically for your code. – Kevin Jan 07 '15 at 08:41

1 Answers1

1

Headers already sent is an issue where you try to redirect an user with header() or when you try to start a session session_start() when the browser already rendered content (for example html, but can also be a PHP echo statement for example).

To fix the issue, check if you have any echo() statements or raw HTML before sending headers, and check if you do not have whitespaces in front of <?php.

A more detailed answer to help you fix this issue can be found here: https://stackoverflow.com/a/8028987/4274852

I suspect you did not provide us with all your code, as I cannot find any specific problems in yours at the moment. I hope the link above helps you to debug your code, if not: Make sure to post everything above your PHP code.

Just a note: I see you are still using mysql_query statements, which are deprecated. Use msqli or PDO instead.

Edit

I see you posted your code, try replacing all your PHP code at the top of your page instead of in the middle and it should work. In your current code, you have raw HTML before the PHP code (<h1> and <p> elements in this case), which makes it impossible to send more header data using header(), as all headers were already sent before rendering the page.

I editted your code to fix the issue hopefully, you can find it here (instead of posting it here, which would make an awkward long answer):

http://pastebin.com/0JfBdjU5

Community
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Kevin
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  • sir can sent me your edited code to my email because my connection is too slow to provide it.. Thanks. here is my email. caneo.jeser@gmail.com Thanks.. :) – Jeser Caneo Jan 07 '15 at 08:46