[Resolved] thumbnail script implementation

sharyn

Platform : Windows XP pro
Server : IIS
PHP ver : PHP ver 4.3.6 with GD

I am trying to implement Thumbnails in PHP by Michael Bailey into my own code and I can't make a thumbnail. I get the "broken image" image and when I right click on it to view image I keep getting this error :

Warning: Cannot modify header information - headers already sent by (output started at c:\inetpub\wwwroot\clickreturn\Thumbs.php:8) in c:\inetpub\wwwroot\clickreturn\Thumbs.php on line 85

The error occurs on the line in Thumbs (Michael's code) that says
header("Content-type: image/jpeg");

It's also followed by garbage that looks like this :
ÿØÿàÿþCREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality
plus a bunch of other junk

Michael's code can be found in the link above and my code that calls it looks like this :

  printf("<tr>
         <td><input type=\"checkbox\" name=\"checkbox".$myrow['MapID'].
           "\" value=\"checkbox\"></td>\n
         <td><a href=%s?Map=%s&MapID=%s&Lat=%s&Lon=%s>
            <img src=\"Thumbs.php?Maps/%s\"border=\"0\"></a></td>\n
         <td>%s<center><a href=%s?Map=%s&MapID=%s&Lat=%s&Lon=%s>%s</center></font></td>\n
         <td><center>%s%s</center></font></td>\n
         <td><center>%s%s</center></font></td>\n
        </tr>",
        $_SERVER['PHP_SELF'], $KW, $myrow["MapID"], $Lat, $Lon, $myrow["MapFilename"],
        $fontset, $_SERVER['PHP_SELF'], $KW, $myrow["MapID"], $Lat, $Lon, $myrow["Keywords"],
        $fontset, $myrow["Latitude"],
        $fontset, $myrow["Longitude"]);

Thanks in advance for anyone that can help me make thumbnails on the fly

nemonoman

Warning: Cannot modify header information - headers already sent by (output started at c:\inetpub\wwwroot\clickreturn\Thumbs.php:8) in c:\inetpub\wwwroot\clickreturn\Thumbs.php on line 85

This warning says:

ON line 85 of Thumbs.php, you tried send a header()

BUT on line 8 of the same you sent some output (you printed, echo'd or included something)

First send all your headers, THEN and only then send your output.

or search in these forums for Rachel2004 who wrote about ob_start and ob_end_flush functions

sharyn

Ok nemonoman,

I got it ! I had a extra space in front of the "<?php" in the Thumbs file... It wants nothing in front of it outputting to the screen and that means something as innocuous as a blank line

Thanks a million 😃😃

Here is a handy article in case anyone else has this problem.

http://www.devnetwork.net/forums/viewtopic.php?t=1157