Image resize problems

lazylinepainter

Hi all,

I'm sorry to bombard the board with problems today but i'm having real difficulty understanding why my resize_image script won't work now its in a Unix environment when it worked fine in a Windows environment.

I will post my script (its not very big) not because i can't be bothered to debug and find it for myself but because i don;t think i even know what i'm looking for.

<?php

$image = $HTTP_GET_VARS['image'];

if (!$max_width)
  $max_width = 130;
if (!$max_height)
  $max_height = 110;

$size = GetImageSize($image);
$width = $size[0];
$height = $size[1];

$x_ratio = $max_width / $width;
$y_ratio = $max_height / $height;

if ( ($width <= $max_width) && ($height <= $max_height) ) {
  $tn_width = $width;
  $tn_height = $height;
}
else if (($x_ratio * $height) < $max_height) {
  $tn_height = ceil($x_ratio * $height);
  $tn_width = $max_width;
}
else {
  $tn_width = ceil($y_ratio * $width);
  $tn_height = $max_height;
}

$src = ImageCreateFromJpeg($image);
$dst = ImageCreate($tn_width,$tn_height);
ImageCopyResized($dst, $src, 0, 0, 0, 0,
    $tn_width,$tn_height,$width,$height);
Header('Content: jpeg/image');

ImageJpeg($dst, null, -1);
ImageDestroy($src);
ImageDestroy($dst);

?>

basically just accepts an image passed from the querystring (incidentally i can;t get this working either, i have been substituting it with an image in the folder).

The problem is it just prints out a load of random stuff, for example

ÿØÿàJFIFÿþ>CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality ÿÛC $.' ",#(7),01444'9=82<.342ÿÛC 2!!22222222222222222222222222222222222222222222222222ÿÀnp"ÿÄ ÿÄµ}!1AQa"q2?‘¡#B±ÁRÑð$3br‚

No idea whats going on! Please help if you can!

I'm running Apache 1.3 with PHP 5 on Mac OS X 10.3.4

thanks
Stuart

Weedpacket

The random garbage is the binary JPEG data. So the image is getting out to the client fine, but it's going out with the wrong Content-Type header: it should be "image/jpeg".

Why it works on Windows ...

lazylinepainter

Hi,

thanks for the assistance there, but i still can't get it working. I use the page as a means of returning a smaller image for example on index.php i have

echo "<img src=resize_image.php?image=$whatever_image

I can't work out why this doesn't return a JPEG to the index.php page?

Adding the correct header definately stopped all the random stuff but now when i try to view source of the resize_image.php page, it acts like theres an image by offering to 'save image as' but the page is blank.

I do however get an error message when i load the page in firefox:

The image http://localhost/site/resize_image.php?image=image.jpg cannot be displayed, because it contains errors.

The image is definately in the right directory so i don't think its a case of the page using the wrong path for the image either

I added the header:

header('Content-type: image/jpeg');

I'm sorry this sounds so vague but i don't know the best way to describe it. Does this sound like a problem in one of the config files, e.g. httpd.conf or php.ini? I thought i had all the jpeg stuff sorted as it finds the imagecreatefromjpeg() function and the rest?!

Only i ask because i really wouldn't recognise if the error was to do with my set up and not my code!

Thanks again!
Stuart🙂