GIF compression quality in PHP?

Question

How to compress GIF image file in PHP5?

I know it is possible to do this with JPG, like this imagejpeg ($ resource, $ filename, $ quality) according to http://us.php.net/manual/en/function.imagejpeg.php

Answer 1

JPG - lossy compression. This means that you can use the quality parameter to adjust the size to quality ratio.

GIF is lossless compression, you cannot improve compression by adjusting quality.

To create a GIF image, use imagegif (...)
http://us.php.net/manual/en/function.imagegif.php

Answer 2

, , , - . PHP:

$img = imagecreatefromstring(file_get_contents($_FILES["my_field"]["tmp_name"]));
imagetruecolortopalette($img, false, 16);  //  compress to 16 colors in gif palette (change 16 to anything between 1-256)
imagegif($img, $destination_filename);  //  $destination_filename is the location on your server where you want to save the compressed gif file

: JPG/GIF- PNG PHP?

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http://searchcio-midmarket.techtarget.com/definition/lossless-and-lossy-compression : " (GIF) - , , ". , , " - ". , , , , 100% . - , gif , gifs " ". , jpeg 100% , , .

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Answer 3

GIF-, imagecreatefromgif: http://www.php.net/manual/en/function.imagecreatefromgif.php

imagejpeg JPEG. .