Comments on: Resize and Crop Photos with PHP’s GD Library

By: France

France — Wed, 22 Dec 2010 16:43:39 +0000

Hello Joyce,
just to say that after one year I’m still using your wonderful script, thanks again and merry christmas!
France

By: Joyce

Joyce — Thu, 19 Nov 2009 13:21:17 +0000

Hi France, I did not include an option to specify quality in the class, since the default seems to work well for web use. However, PHP's imagejpeg function, which called as one of the steps in the class's resize function, does take an optional quality parameter. You would obviously have to update the class to use it. Check out the PHP manual for details. Thanks for your comment!

By: France

France — Wed, 18 Nov 2009 14:53:29 +0000

Hello Joyce,
is it possible to increase the quality of the uploaded resized image?
I imagine I have to change something in photo.php but can’t find what to change..

Thanks.
France

By: Joyce

Joyce — Tue, 10 Nov 2009 18:24:58 +0000

Emmanuel & France: Thank you for your comments! I’m glad this is proving useful to you!

By: France

France — Tue, 10 Nov 2009 18:09:33 +0000

Thank you so much Joyce, the crop function is what I was trying to do for days and days, I was going to give up!

France

By: Emmanuel

Emmanuel — Tue, 10 Nov 2009 16:39:42 +0000

Hey Joyce, thank you for this class, we are using it on our intranet and it works flawlessly!

Have a good day.

By: Joyce

Joyce — Mon, 09 Nov 2009 13:06:24 +0000

Hi Gareth,

I hope I am answering your question… There are two steps in cropping a picture. First you have to instantiate the photo object and you do that by passing the $_FILES['image'] array to the class constructor like this:

$photo = new Photo($_FILES['image']);

Then you have to pass the height and width you would like to crop the image to and the directory where you want to store the cropped image to the doCenterCrop function.

I have not set up the class to run a succession of cropping and resizing functions against a photo, but I think you could do it, either by checking out the GD functions at php.net or by resizing using my class, and then cropping. When you do the crop, you’d have to re-instantiate the class using the resized photo. It may take some fiddling with the class to get it to work. You’ll have to try it out.

I hope this helps!

Joyce

By: Gareth Rees

Gareth Rees — Fri, 06 Nov 2009 17:42:04 +0000

Also is it possible to do a Center Crop which is propositional. i.e. I have pictures of cars 160×120 as they usually are wide image.

Which i’d guess result in just showing the door – is it possible to do a full crop until the biggest x or y is met – then do center crop so that there is only a small amount of clipping usually on the sides? as the smallest would be 120?

I think the above sounds right
Thanks for your time!

By: Gareth Rees

Gareth Rees — Fri, 06 Nov 2009 17:29:54 +0000

Hi Joyce,

In the above you currently have this:

$photo = new Photo(array(‘name’=>’mydirectory/myfile’,'tmp_name=>’mydirectory/myfile’));
$width = 190;
$height = 131;
$photo->doCenterCrop($width,$height);

A) Do i replace the original line from: $photo = new Photo($_FILES['image']);

I am not sure that the whole: array(‘name’=>’mydirectory/myfile’,'tmp_name=>’mydirectory/myfile’) part is or as to where the additional code, Can you just detail where i should add the insertion?

Thank you

By: Joyce

Joyce — Thu, 05 Nov 2009 13:19:54 +0000

Hi Gareth, Sorry it’s taken me so long to get back to you. Can you be more specific regarding the problem you are having? The syntax is as follows:

$photo->doCenterCrop(final_width, final_height, path_to_directory_to_store_image);

Joyce