chiphpug-discuss

[chiPHPug-discuss] automaticly create a thumbnail

[Melanie M. <me...@po...>]

I create a custom "photo gallery" .  Currently my client upload a thumbnail
and the regular size image.  Now my client only wants to upload a regular
size image and have the "system" automaticly create a thumbnail.  

 

I have not idea how to do this, into the code I already have.  Do any of you
know how?

   

PS - still working on the .pdf creation.  Thanks to all who past me
information. 

 

Thanks,

Melanie 

 

 

Re: [chiPHPug-discuss] automaticly create a thumbnail

[Richard L. <ce...@l-...>]

On Mon, January 29, 2007 12:38 pm, Melanie McClusky wrote:
> I create a custom "photo gallery" .  Currently my client upload a
> thumbnail
> and the regular size image.  Now my client only wants to upload a
> regular
> size image and have the "system" automaticly create a thumbnail.
>
> I have not idea how to do this, into the code I already have.  Do any
> of you
> know how?

exec with convert is very powerful, but can have performance issues,
as firing up exec with a mini-shell can get kind of expensive.

Here is a thumbnail script I use:
http://uncommonground.com/thumbnail.phps

Here's the pathinfo.inc file referenced within that:
http://uncommonground.com/pathinfo.phps

It also adds a "credits" sidebar using the colors set by the site
owner in the database, so you can probably ignore that.

Pretty much every photo you see on http://uncommonground.com/ runs
through this script, and that gets about a half million hits a
month...

Except the calendar page, where I pre-generate the thumbnails by hand,
as there are so many, and because I want an extreme close-up rather
than just a shrunken blob.

If you're getting more traffic than that, you may want to consider
running a cron job to thumbnail them once -- I don't do that, as we
haven't quite reached the stage where we need that, but you might.

-- 
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some starving artist.
http://cdbaby.com/browse/from/lynch
Yeah, I get a buck. So?

Re: [chiPHPug-discuss] automaticly create a thumbnail

[Peter H. <ph...@ma...>]

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On Mon, Jan 29, 2007 at 12:38:15PM -0600, Melanie McClusky wrote:
> I create a custom "photo gallery" .  Currently my client upload a thumbnail
> and the regular size image.  Now my client only wants to upload a regular
> size image and have the "system" automaticly create a thumbnail.  

Other folks have given very good suggestions to produce resized photos,
but I wanted to chime in to mention there's a quick-and-dirty hack: set
the height and width attributes of the image to scale the iamge down.
They won't load any faster than full size and it'll be tempting to put a
lot of them on a page, making for a very slow page. But it's handy in a
pinch.

Here's a function to resize images -- you pass in the current width and
height and a new maximum width and maximum height, and it'll return an
array with the a new width and height that preserve the image's aspect
ratio.

function get_scaled_dimensions($width, $height, $max_width, $max_height) {
    if (width > height)
        $scale = $max_width / $width;
    else
        $scale = $max_height / $height;
    return array(floor($width * $scale), floor($height * $scale));
}


- --
Peter Harkins  -  http://push.cx  -  http://nearbygamers.com


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