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Posted by shawn.fowler on 05/29/07 15:54
On Mar 30, 4:27 pm, "three-eight-hotel" <t...@thepetersonranch.com>
wrote:
> I'm somewhat of a newbie to PHP coding, but have developed a site
> using the technology, and have been pleasantly surprised by the
> capabilities offered. I am more comfortable in the ASP world, however
> and am really struggling with managing sessions in PHP, based on my
> experiences with managing sessions in ASP.
>
> 99.9% of the feedback I have seen when dealing with the errors has
> referred to having whitespace before the <?php or after the ?>. I
> have opened my source in several different editors and can't find that
> to be the case with my code. Aside from having general issues with
> the basic methodology in which I am managing sessions, I am completely
> perplexed as to why I am getting these errors, from time to time...
>
> For those who might have recommendations on an overallsession
> management strategy, I basically want to allow my user to come into my
> site, through any page that might be bookmarked. Not all pages are
> going to require asession, but they may be required to have asession
> value set in order to perform certain administrative functions (which
> requires a successful login), so I would need to check for the
> existence of asessionvalue and log them in and set it, if it doesn't
> exist...
>
> Now to my specific problem...
>
> I have an include page called master_session.php, which looks like
> this (no whitespaces before or after php tags):
> =================================
> <?php
> if (! isset($ADMIN_session)) {
> ob_start();
> ob_clean();
> session_start();
> session_register("ADMIN_session");
> }
> ?>
> =================================
>
> I have a login page, which looks like this (no whitespace before the
> include of master_session)
> =================================
> <?php require_once($_SERVER['DOCUMENT_ROOT'].'/common/includes/
> master_session.php'); ?>
> <?php if ($content_identifier == false){
> $content_identifier = 'parish';}?>
> <? $page_title = "Administration"; ?>
> <?php require_once($_SERVER['DOCUMENT_ROOT'].'/common/includes/
> master_header.php'); ?>
> <?php require_once($_SERVER['DOCUMENT_ROOT'].'/common/includes/
> master_nav.php'); ?>
> <?php require_once($_SERVER['DOCUMENT_ROOT'].'/common/includes/
> bg100.php'); ?>
> <!----CONTENT AREA -- PLACE INCLUDE PATH AND FILE NAME BELOW---->
> <form name="criteria_form" action="adminvalidation.php" method="post">
> <table height="100%" border="0" width="81%" align="center"
> background="/common/bkgrnds/bg100.gif"">
> <tr>
> <td colspan="2" height="40"> </td>
> </tr>
> <? if (${"login"} == "invalid")
> echo "The username/password you have entered is invalid, or you do
> not have privileges to perform administrative functions. If you feel
> you've received this message in error, please contact your system
> administrator.";
> ?>
> <tr>
> <td colspan="2" align="center"><strong>Please Login</strong></
> td>
> </tr>
> <tr>
> <td colspan="2" height="40"> </td>
> </tr>
> <tr>
> <td align="right">Username </td>
> <td><input type="text" name="user_nm" size="8" maxlength="8">
> </td>
> </tr>
> <tr>
> <td align="right">Password </td>
> <td><input type="password" name="password" size="10"
> maxlength="10">
> </td>
> </tr>
> <tr>
> <td colspan="2" height="40"> </td>
> </tr>
> <tr>
> <td colspan="2" align="center"><input type="submit"
> name="Submit" value="Submit">
> </td>
> </tr>
> <tr>
> <td><input type="hidden" name="content_identifier" value="<?echo
> ${content_identifier}?>"></td>
> </tr>
> </table>
> </form>
> <!----END CONTENT AREA --- NO CHANGES BELOW THIS LINE-------->
> <?php require_once($_SERVER['DOCUMENT_ROOT'].'/common/includes/
> master_footer.php'); ?>
> ==============================================
>
> master_header.php is where my HTML code starts:
> ========================
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
> <html>
> <head>
>
> etc...................
> ========================
>
> Is there anything in here that jumps out at anyone, as to why I'm
> getting the error? The exact error is:
>
> Warning: session_start() [function.session-start]:Cannotsendsessioncachelimiter- headers already sent (output started at /home/holytrin/
> public_html/common/admin/admin.php:2) in /home/holytrin/public_html/
> common/includes/master_session.php on line 4
>
> btw.. I do an ob_end_flush() in the master_footer.php file, on the
> very last line...
>
> Any help would be greatly appreciated!!!
>
> Best Regards,
> Todd
Hi. I've been having the same problem and I just figured it out. You
can't have anything come before the session call (session_start()).
You can't even have a blank line before the "<?php" tag. That's what
happened to me. The session call worked fine on all but one of my
pages. I put session_start() at the very top of my header.php file (<?
php session_start(); ?>), which is on the very first line of each of
my pages (<?php include ('includes/header.php');). However, on one of
my pages, the code looked like this (I added the line numbers to
emphasize the point):
1.
2. <?php include ('includes/header.php');
3. $page_title = 'Title';
I know it sounds stupid, but the problem was that empty line of code
before my <?php tag. I deleted the first line so the code looked like
this:
1. <?php include ('includes/header.php');
2. $page_title = 'Title';
And it works fine.
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