Resize image using PHP if it's too small

Question

I'm allowing user uploads, and I want to scale their images up if they're too small (low quality is a non-issue). I need to make the smallest side become 150px and have the other dimension scale up to keep the aspect ratio. I need to make it work for .jpg, .gif and .png files.

Any pointers would be greatly appreciated, I'm struggling to find anything about making images larger like this.

possible duplicate of [dynamically scale images in php jpg/png/gif](http://stackoverflow.com/questions/1248149/dynamically-scale-images-in-php-jpg-png-gif) — ChrisF, Aug 29 '10 at 17:03
PHP docs: http://www.php.net/manual/en/function.imagecopyresampled.php and http://www.php.net/manual/en/function.imagecopyresized.php Lots of examples there — Imre L, Aug 29 '10 at 17:08

score 3 · Answer 1 · edited May 23 '17 at 12:13

3

As answered here, give it a try to WideImage.

edited May 23 '17 at 12:13

Community

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answered Aug 29 '10 at 17:02

Alexander

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Thanks alot, will look into it now. – Danny Aug 29 '10 at 17:03
This would have been better posted as a comment to the question. – ChrisF Aug 29 '10 at 17:03

score 1 · Accepted Answer · answered Aug 29 '10 at 19:36

Thanks to Alexander for the WideImage suggestion.

I simply used this:

require_once('WideImage/WideImage.php');
$image = WideImage::load($_FILES['image']['tmp_name']);
$resized = $image->resize(150,150,'outside','up');
$resized->saveToFile($target_file);

It worked perfectly, and by using the "up" option, it only scales images smaller than the dimensions set up, and leaves everything else.

Resize image using PHP if it's too small

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