Newbie here needs help

[stingerman]

Well, I am confused! LOL!

I am building a web page and I want to resize an image via imagemagick and then link that pic to the larger one (like a thumbnail).

For instance if this is the code for the regular image:

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<src="/images/starlin1.jpg>

What do I need to do to resize?

Do I need to make a resize php script or something and run it through that? Is there one available somewhere?

such as:

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<src="images/phpscriptresize/starlin1.jpg?(200)

I can't just run it through the server imagemagick path like (because this didn't work and it gave me some 24x24 pic of something missing):

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<img src="/usr/local/bin/convert  images/starlin1.jpg'[64x64]'    starlin1.gif">

Please help Thanks
-Matt

[fmw42]

see http://www.rubblewebs.co.uk/imagemagick/ for ImageMagick using PHP

[stingerman]

I still can't get it to work.

I got a gd script working but its slow.

IM does work in my wiki page so i gotta be doing something wrong.

Do I need a script to resize an image? and is that different than the command line? and where can I get one?

[fmw42]

I still can't get it to work.

I got a gd script working but its slow.

IM does work in my wiki page so i gotta be doing something wrong.

Do I need a script to resize an image? and is that different than the command line? and where can I get one?

I don't know enough about PHP, but there is a script for resizing again at http://www.rubblewebs.co.uk/imagemagick ... filter.php

in command line you would do

convert image.jpg -resize args smallimage.jpg

where args are explained at http://www.imagemagick.org/script/comma ... php#resize

You may want to get more familiar with IM by reading:

http://www.imagemagick.org/script/comma ... ptions.php
http://www.imagemagick.org/Usage/

[stingerman]

I have read all those but still can't figure it out.

Do I need a separate php file to call up imagemagick?

[fmw42]

I have read all those but still can't figure it out.

Do I need a separate php file to call up imagemagick?

You need a PHP script (don't know if you need a separate file, but often that is part of the whole script for process with IM).

See if you can access IM from PHP to find out what version you have. You need to know where IM is located. On my ISP server the following work. Try one or all of them or contact your ISP to find out where IM is located or if they even have it.

The following are each in separate files for my testing of my server, but you can process IM in one long file.

Again, I am not expert and this is as far as I got with IM and PHP:


<?php
system("/usr/local/bin/convert -version");
?>

returns:
Version: ImageMagick 6.2.7 06/08/06 Q16 http://www.imagemagick.org Copyright: Copyright (C) 1999-2006 ImageMagick Studio LLC

<?php
$IM_version=shell_exec("/usr/local/bin/convert -version");
echo $IM_version
?>

returns:
Version: ImageMagick 6.2.7 06/08/06 Q16 http://www.imagemagick.org Copyright: Copyright (C) 1999-2006 ImageMagick Studio LLC


<?php
exec("/usr/local/bin/convert -version",$out,$returnval);
print_r($out[0]);
?>

returns:
Version: ImageMagick 6.2.7 06/08/06 Q16 http://www.imagemagick.org

[stingerman]

I do have it installed.

Version: ImageMagick 6.2.7 06/08/06 Q16 http://www.imagemagick.org Copyright: Copyright (C) 1999-2006 ImageMagick Studio LLC

path: /usr/local/bin/convert

For example what would I do to rezise this image to 156width/237height:

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"images/starlin1"

and how to put it in:

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<IMG border="0" SRC="does-resize-code-go-here?">

Thanks for helping me out, btw.

[Bonzo]

You will need some sort of code to tell php what to do. I put mine in an upload form and resize on upload.

You can resize "on the fly" using something like:
PUT THIS ON A PAGE OF ITS OWN AND CALL thumbnail.php

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<?php
$photo = $_GET['p'];
$height  = '125';
$width = '200';
$cmd = "convert $photo -thumbnail {$width}x{$height} JPG:-";
header("Content-type: image/jpeg");
passthru($cmd, $retval);
?>

Call from your page using:

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<img src="thumbnail.php?p=input.jpg">

[stingerman]

You will need some sort of code to tell php what to do. I put mine in an upload form and resize on upload.

You can resize "on the fly" using something like:
PUT THIS ON A PAGE OF ITS OWN AND CALL thumbnail.php

Code: Select all

<?php
$photo = $_GET['p'];
$height  = '125';
$width = '200';
$cmd = "convert $photo -thumbnail {$width}x{$height} JPG:-";
header("Content-type: image/jpeg");
passthru($cmd, $retval);
?>

Call from your page using:

Code: Select all

<img src="thumbnail.php?p=input.jpg">

Ahhh, it worked! However, I had to put my correct path for the convert

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/usr/local/bin/convert

Thank you, I have been looking for this all over the place!

[stingerman]

Is there a way to put the resized dimensions in the image tags? -- instead of making another thumbnailx.php?

[Bonzo]

Try this:

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<?php
$photo = $_GET['p'];
$height  = $_GET['h'];
$width = $_GET['w'];
$cmd = "convert $photo -thumbnail {$width}x{$height} JPG:-";
header("Content-type: image/jpeg");
passthru($cmd, $retval);
?>

<img src="thumbnail.php?p=input.jpg&w=200&h=125">

[stingerman]

That's the one! Man, thanks a lot. I just started a comic book website and this is going to save me a ton of time with the previews and such!

Oh, any idea how to add on a header?

For, example:

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<a href="thumbnail.php?p=images/ai71.jpg">

would also contain my header.

I tried adding the header html before the php tags in the thumbnail php but got an error message:

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Warning: Cannot modify header information - headers already sent by (output started at /home/xxxxxx/xxxxxxxx/html/thumbnailtesta.php:9) in /home/xxxxx/xxxxxx/html/thumbnailtesta.php on line 24

Line 24 is:

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

Do I need to add something more/different?

[Bonzo]

I do not think its possible using this method as you need the header to make sure the image shows as an image and not garbage and you can not put anything before the header - catch 22.

I got mixed up with my image tags and link ones; thats what comes of trying to do things in a hurry!

I am trying to think of a way to do this by passing the image name to the thumbnail.php page but at the moment I can not think of a way.

[Bonzo]

At the back of my mind I knew there was a way to do this using .htaccess An example here using GD http://sneak.co.nz/2006/10/27/dynamic-image-resizing/

I searched Google for "resize image .htaccess"

I would think this was possible to mod for Imagemagick.

[stingerman]

Not a big deal.

Though I think they use it here - http://comicbookresources.com/?page=pre ... disp=table (click on the enlarge button) - assuming they use imagemagick