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How do I get rid of "Cannot send session cache limiter - headers already sent "?

Posted on 2009-07-10
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Last Modified: 2012-05-07
I'm using flash/xml site template from flashden. while the site is under construction I have added a login module using sessions so that only the guys who are working on the project can view the pages.
My problem is that after login, when my page is redirected to the home page, I get the warning as follows:
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent....
I have gone over the same problem posted on our Experts Exchange and tried some solutions offered in vain. The session_start() is on the first line after the <?php delimiter and ther is also no white space anywhere...
Can someone please help me to solve this issue? Thanks in advance.
<?php session_start(); 
 
if($_SESSION['admin'] && $_SESSION['admin'] != ""){
//do nothing
}else{
echo "<script language=\"JavaScript\">location.replace(\"index.html\"); </script>";
}
	
	?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
// Rest of the code

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Question by:786aslamkhan
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11 Comments
 
LVL 11

Expert Comment

by:BrianMM
ID: 24821946
Might seem trivial but try it like this.
<?php
session_start();
...stuff

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LVL 7

Expert Comment

by:fluglash
ID: 24821960
post some code from the beginning of your index.html, please
0
 
LVL 11

Expert Comment

by:BrianMM
ID: 24821962
failing that, it's a problem saving the file... most likley text encoding of whatever editor you are using.
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LVL 12

Expert Comment

by:jet-black
ID: 24821978
If you are using UTF-8 encoding,
uncheck "Include Unicode Signature (BOM)".
before saving.
0
 
LVL 9

Expert Comment

by:pmessana
ID: 24822663
Much like Brian said but I would go a bit further to keep it clean and ensure that it is getting parsed correctly.
<?php
 
session_start(); 
 
if($_SESSION['admin'] && $_SESSION['admin'] != ""){
  //do nothing
}else{
  echo "<script language=\"JavaScript\">location.replace(\"index.html\"); </script>";
}
        
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
// Rest of the code

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Author Comment

by:786aslamkhan
ID: 24824765
Thanks BrianMM for your response. I tried putting session_start() on the second line as suggested- does not work.

Thanks jet-black I tried saving the file by unchecking the "Include Unicode Signature (BOM)". Does not work.

Thanks pmessana for your suggestion.

Thanks fluglash!

I have attached the whole file, so you all can have a look.

Thanks again BrianMM, jet-black, pmessana and fluglash.


<?php session_start(); 
 
if($_SESSION['some_name'] && $_SESSION['some_name'] != ""){
//do nothing
}else{
echo "<script language=\"JavaScript\">location.replace(\"index.html\"); </script>";
}
	
	?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="Author" content="author">
<meta name="keywords" content="keywords" />
<meta name="description" content="desc" />
<title>Title</title>
 
<script type="text/javascript" src="swfobject.js"></script>
<script type="text/javascript" src="swfaddress.js"></script>
<script type="text/javascript" src="swffit.js"></script>
 
 
<style type="text/css">
	/* hide from ie on mac \*/
	html {
		height: 100%;
		overflow: hidden;
	}
	
	#flashcontent {
		height: 100%;
	}
	/* end hide */
 
	body {
		height: 100%;
		margin: 0;
		padding: 0;
		background-color: #0d0d0d;
	}
	p {
 
	font-size: 10px;
	font-family: Verdana;
	line-height:17px;
	color:#999999;
	
}
#apDiv1 {
	position:absolute;
	left:454px;
	top:58px;
	width:197px;
	height:37px;
	z-index:1;
}
#apDiv2 {
	position:absolute;
	left:442px;
	top:481px;
	width:261px;
	height:51px;
	z-index:2;
}
#apDiv3 {
	position:absolute;
	left:443px;
	top:114px;
	width:267px;
	height:53px;
	z-index:1;
}
#apDiv4 {
	position:absolute;
	left:500px;
	top:440px;
	width:262px;
	height:52px;
	z-index:1;
}
#Layer1 {
	position:absolute;
	left:447px;
	top:176px;
	width:53px;
	height:21px;
	z-index:1;
}
.style3 {
	color: #FFFFFF;
	font-family: Verdana, Arial, Helvetica, sans-serif;
}
#Layer2 {
	position:absolute;
	left:372px;
	top:68px;
	width:101px;
	height:22px;
	z-index:1;
}
</style>
<script src="../Scripts/AC_RunActiveContent.js" type="text/javascript"></script>
<script type="text/javascript">
<!--
function MM_popupMsg(msg) { //v1.0
  alert(msg);
}
//-->
</script>
</head>
<body onload="MM_popupMsg('Right_Click Mouse  to select Full Screen option.\rIt\'s Recommended!')">
<div id="flashcontent"> 
 
  <p style="color:#999999">
    You need Adobe Flash Player 9.0.115 to visit this site.</p>
  <hr width="360" align="left"/>
 <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="" /></a></p>
</div>
    
 	 
	
<script type="text/javascript">
   	var flashvars = {};
	flashvars.url_config="xml/configuration_site.xml";
	flashvars.initServices=true;
	var params = { allowfullscreen:true,allowScriptAccess:"always" };
	var attributes = { id:'flashObject' }; // give an id to the flash object
	
	swfobject.embedSWF("index.swf", "flashcontent", "100%", "100%", "8", "expressInstall.swf", flashvars, params,attributes);
	//swffit.fit("flashObject",900,620);
</script>
	     
 
 
</body>
</html>

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LVL 12

Expert Comment

by:jet-black
ID: 24824945
786aslamkhan,

There is no problem about your code.
The error you are facing is resulting because of there is hidden characters before <?php tag.

You can download
RapidPHP http://www.blumentals.net/rapidphp/
Then select Options->Show Hidden Characters

And remove the hidden characters then save the file.

Also,
you can attach the zip file and we remove the hidden characters.
0
 
LVL 12

Accepted Solution

by:
jet-black earned 500 total points
ID: 24825067
or simply download
http://www.crimsoneditor.com/download/cedt370r.exe

open your file,
then choose Document->Encoding Type->UTF-8 Encoding(w/o BOM)

And save your file.
0
 
LVL 12

Expert Comment

by:jet-black
ID: 24825106
0
 

Author Closing Comment

by:786aslamkhan
ID: 31602010
Thanks a ton jet-black! it worked! my problem solved. AND I HAVE LEARNED FROM YOU.
THANK YOU SO VERY MUCH!!!!!!!!!!!
0
 
LVL 12

Expert Comment

by:jet-black
ID: 24826563
Welcome :)
0

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