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Error: "Header info already sent"

I know what the error means but I can't see it in the attached code.
I'm getting the following error:

Warning: Cannot modify header information - headers already sent by (output started at /home/langsyst/public_html/Lansco/Company_Display.php:30) in /home/langsyst/public_html/Lansco/Company_Display.php on line 46

Line 30 is "<?php

The include statements at the top have no "echo"

I've attached the code.
Company_Display.php
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breeze351
Asked:
breeze351
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1 Solution
 
Branislav BorojevicFounderCommented:
You seem to have a whitespace after the closing
?>

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.

Please remove the whitespace and re-test.
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Dave BaldwinFixer of ProblemsCommented:
Header ("Location:$work"); can not be used after you have sent HTML content.  After all, it is a header and must come before any content.
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gr8gonzoConsultantCommented:
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breeze351Author Commented:
Where is the HTML content?  I don't see it.  I know that's the problem.
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gr8gonzoConsultantCommented:
Lines 12-29 are all output - everything from <!DOCTYPE....> to the blank space after the <body> tag are all output. Just move it down to the bottom of that same file.
1
 
Ray PaseurCommented:
Maybe try it like this:
<?php


ob_start();


// **************************************************************
// * Company_Add.php                                            *
// * Keyin screen for company add/edit.                         *
// **************************************************************
// * Ver    By     Date       Description                       *
// * 4.01   GJJD   04/25/16   Modify for PHP 5.6                *
// **************************************************************
	include 'Session_Start.php';
	include 'db_connect_inc.php';
?>	
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  "http://www.w3.org/TR/html4/loose.dtd">
<head>
<title>Contact Display</title>
	<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
	<link rel="stylesheet" type="text/css" href="NewCss.css">
    <script type='text/javascript' src='//code.jquery.com/jquery-2.1.3.js'></script>
    <script type="text/javascript" src="http://digitalbush.com/wp-content/uploads/2014/10/jquery.maskedinput.js"></script>

<script type="text/javascript">
		function MM_goToURL() 
		{ 
			var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
			for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
		}
</script>
</head>   
<body>	

<?php
	include 'Check_Login.php';
	include 'Prog_Count_inc.php';
	$Display_Phone = $_SESSION['South'];
	$_SESSION['South'] = str_replace("/", "", $_SESSION['South']);
	$_SESSION['South'] = str_replace("(", "", $_SESSION['South']); 
	$_SESSION['South'] = str_replace(")", "", $_SESSION['South']); 
	$_SESSION['South'] = str_replace(" ", "", $_SESSION['South']); 
	$_SESSION['South'] = str_replace("-", "", $_SESSION['South']); 
	$_SESSION['South'] = trim($_SESSION['South']); 
	$work = strlen($_SESSION['South']);
	if ($work != 10)
	{
		$_SESSION['Message'] = "Invalid phone number entered!";
		$_SESSION['Error'] = "Y";
		$work = $_SESSION['Last_Page'];
		Header ("Location:$work");
		exit;
	}
	$Data = $_SESSION['South'];
	include 'menu_inc.php';

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Ref:
https://www.experts-exchange.com/articles/4423/Warning-Cannot-modify-header-information-headers-already-sent.html
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Dave BaldwinFixer of ProblemsCommented:
Hello????  You can NOT put Header ("Location:$work"); (line 51 in Ray's code) after any HTML content has been sent!!!!  It is an HTTP header, it MUST come before any content is sent.  That is the reason for the error message.

For reference:  http://php.net/manual/en/function.header.php
2
 
Ray PaseurCommented:
Further to Dave's point, that is the purpose of using ob_start().  This is all explained in the article, but to recap: ob_start() in this usage stops the server from sending the output to the browser.  Instead, the browser output is captured and held in a PHP buffer until there is another deliberate PHP buffering event, or the end of the script, with implicit ob_end_flush().  Only then will the browser output be released and sent.  Thus the PHP header() function can proceed without the interference of a prior browser output event.
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breeze351Author Commented:
Got it.
Thanks
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