Warning: cannot modify header information

BlackIbanez

Warning: Cannot modify header information - headers already sent by (output started at /path/index.php:9) in /path/header.php on line 9

Can somebody explain to my why this error occurs?

Thanx for your support..

drew010

you are trying to send a header with [man]header[/man] after you have begun to output the body part of the webpage. headers come before the body, so once php has started to send the html you cant add another header, and thats why its complaining. it says that the output started in index.php on line 9 and you are trying to send a header from header.php on line 9.

BIOSTALL

How do i go about editing the headers halfway down my page. Because i'm watermarking an image, so i'm outputting my navigation bar etc... then i need to change the header content type to image.. output the image and then i need to convert the header content type back to text/html to output the bottom of my page.

Can anyone think of a way around this please.

Many thanks, BIOSTALL

devinemke

Output Control Functions

BIOSTALL

excuse me but i've never really ventured into buffers and stuff before :-S Would you be kind enough to tell me what order my page should go in. ie.. where shoul i put ob_start, where should i add the header information and stuff.

Would be greatly appreciated 🙂 thanks, BIOSTALL

drew010

its not possible to switch the content types from html to image and back. if you have an html page, you cant output html, then change the content type and output image data. its either one or the other, not both in one document.

BIOSTALL

So how do i go about it then?? See here: http://vampirefreaks.com/profile.php?user=brains?? You can see they have a watermarked image in the middle of the page.. How do they do it??

Thanks... BIOSTALL

drew010

they just use an image tag in their webpage. <img src=....>

BIOSTALL

but its a watermarked image :-S

bokehman

Don't be daft! You can't do that. You cant serve an image half way through HTML. All you can do is serve the <img> tag, not the image. Each individual item needs its own request from the browser.

It is quite possible to serve an image or an html file from the same script but not at the same time.

If you need help with this you should post the code.

BIOSTALL

Heres my code:

<?php
		$getlocation = mysql_result(mysql_query("SELECT image_location FROM Galleries WHERE image_id='$imageid'",$connection),0);

	$watermark = imagecreatefrompng('Watermark.png');  
	$watermark_width = imagesx($watermark);  
	$watermark_height = imagesy($watermark);  
	$image = imagecreatetruecolor($watermark_width, $watermark_height);  
	$image = imagecreatefromjpeg('Photos/'.$getlocation);  
	$size = getimagesize('Photos/'.$getlocation);
	$dest_x = $size[0] - $watermark_width - 5;  
	$dest_y = $size[1] - $watermark_height - 5;  
	imagecopymerge($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, 100);

	imagejpeg($image);
	imagedestroy($image); 
	imagedestroy($watermark);
?>

I have html code above and below this code. The trouble is... i need to change the header content type in order to produce the image but your saying i cant change the header content type so how do i do it??

Thanks for all your help.. it is appreiated 🙂 I'm learning a lot here.

BIOSTALL

bokehman

Post the whole thing! HTML, the lot!

drew010

nothing is stopping you from doing
<img src="imagegenerator.php?username=blah">
that image tag calls a php script that takes the username in the $_GET parameter, and makes the image with your image library and outputs it with the appropriate content header.
thats probably how they are doing it.

edit: actually it turns out they just watermarked it on the upload and then saved it to disk: http://img.vampirefreaks.com/upic/b/br/bra/brains/4982670.jpg

BIOSTALL

<html>
<head>

<title>SCAR:RED GALLERY</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

</head>

<body bgcolor="#666666" text="#CC0000" link="#CC0000" vlink="#CC0000" alink="#CC0000">

<table width="99%" height="398" border="3" align="center" cellspacing="5" bordercolor="#333333">
  <tr valign="top" bgcolor="#000000"> 
    <td height="134"><div align="center"><img src="Skull.jpg" width="77" height="105" align="top" /> 
    <img src="LOGO.gif" width="464" height="130" align="top" /><img src="Skull.jpg" width="77" height="105" align="top" /></div></td>
  </tr>
  <tr bgcolor="#000000"> 
    <td width="18%" height="23" valign="top"><p align="center">
      <object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="862" height="32">
        <param name="movie" value="ScarredMenu.swf">
        <param name="quality" value="high"><param name="BGCOLOR" value="#000000">
        <embed src="ScarredMenu.swf" width="862" height="32" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" bgcolor="#000000"></embed>
      </object>
</p></td>
  </tr>
  <tr bgcolor="#000000">
    <td height="200" valign="top"><div align="center"><br>
        <table width="95%"  border="0" cellspacing="0" cellpadding="2">
          <tr>
            <td width="33%"><div align="left"><a href='<?php echo $prevlink ?>'><img src="ImagePrev.gif" width="171" height="45" alt="Previous" border="0"></a></div></td>
            <td width="34%"><div align="center"><a href='<?php echo $returnlink ?>'><img src="ImageReturn.gif" width="121" height="45" alt="Return to Gallery" border="0"></a></div></td>
            <td width="33%"><div align="right"><a href='<?php echo $nextlink ?>'><img src="ImageNext.gif" width="120" height="45" alt="Next" border="0"></a></div></td>
          </tr>
        </table>
        <p>
<?php
		$getlocation = mysql_result(mysql_query("SELECT image_location FROM Galleries WHERE image_id='$imageid'",$connection),0);

	$watermark = imagecreatefrompng('Watermark.png');  
	$watermark_width = imagesx($watermark);  
	$watermark_height = imagesy($watermark);  
	$image = imagecreatetruecolor($watermark_width, $watermark_height);  
	$image = imagecreatefromjpeg('Photos/'.$getlocation);  
	$size = getimagesize('Photos/'.$getlocation);
	$dest_x = $size[0] - $watermark_width - 5;  
	$dest_y = $size[1] - $watermark_height - 5;  
	imagecopymerge($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, 100);

	imagejpeg($image);
	imagedestroy($image); 
	imagedestroy($watermark);		

	$getcomments = mysql_query("SELECT *, DATE_FORMAT(comment_date, '%d/%m/%Y') AS date1, TIME_FORMAT(comment_time, '%h:%i%p') AS time1 FROM ImageComments WHERE image_id='$imageid' ORDER BY comment_date DESC, comment_time DESC",$connection) or die(mysql_error());
	$nocomments = mysql_num_rows($getcomments);
	if ($nocomments==0) {
		echo "<i><a href='ImageComment.php?phid=$imageid'>Be the first to make a comment about this photo here</a></i><br><br>";
	}else{
		echo "<table width='50%' align='center' border='1' cellpadding='5' cellspacing='0'>";
		while ($getcoms=mysql_fetch_array($getcomments)) {
			$comment_from = $getcoms['comment_from'];
			$comment_date = $getcoms['date1'];
			$comment_time = $getcoms['time1'];
			$comment_comment = $getcoms['comment'];

			$echocomms .= "<tr><td valign='top'><font size='-1' color='#999999'><b>$comment_from says: (posted on $comment_date at $comment_time)</font></b><br><br><font color='#999999'>$comment_comment</font></td></tr>";
		}
		echo $echocomms;
		echo "<tr><td align='center'><font size='-1'><i><a href='ImageComment.php?phid=$imageid'>Leave a Comment...</a></i></font></td></tr></table><br>";
	}

?>
		</p>
      </div></td></tr>
</table>
</body>
</html>

leatherback

Hi Biostall,

Have a look at drew's post. He has given you the way to go.

The problem is, you cannot easily output two different document types using one script. THat said, you can circumvent, by creating two seperate scripts:

What you do, you have the script for watermarking the image, which outputs an image (Say you call it image.php). You then create in the page which needs to show the image (mypage.php), and use the page for watermaking as an image source:
in mypage.php:
...
lots of html stuff
..
<img src="image.php?imageid=2"> -> This will call the script image.php, and apss an imageID to it.

...
more HTML stuff here
...

Hope this helps.

bokehman

How is '$image_id' getting populated? Where is that data coming from?

BIOSTALL

THANK YOU LeatherBack!!

Thats just what i needed... someone to put in plain english 🙂 I'd kiss u if i wernt a man :-P

Cheers,

BIOSTALL