Cannot optimize image in PHP

Asked Aug 01 '17 at 13:58

Active Aug 01 '17 at 13:58

Viewed 41 times

This is the code I have:

$from = ...; // original uploaded file
$target = ...; // save path for optimized file
@unlink($target); // removes file if already exists
$image_o = imagecreatefromjpeg($from); // get a file
imagejpeg($image_o, $target, 85); // save optimized
imagedestroy($image_o); // free memory

But it doesn't do anything. This is going in loop, but now I test it on the single file. Seems to be working on smaller files. I tried image with size ~120 kB and optimized OK. But file with more than 1 MB, it will do nothing and those are files I really need to optimize. I also tried this:

set_time_limit(6000);
ini_set('memory_limit', '200M');

But no help. I'm working on a shared hosting, so I have no access to the php.ini or to install 3rd party PHP extension. Is there an alternative for imagecreatefromjpeg which seems to be the problem?

asked Aug 01 '17 at 13:58

Patrik Krehák

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How many images ? If you treat 1 big image does it work ? – Pierre Granger Aug 01 '17 at 14:01
There is like 5-6 small images and 1-3 big. But it doesn't even work with single one (the big one). – Patrik Krehák Aug 01 '17 at 14:03
have you tried `ini_set('display_errors',1) ; error_reporting(E_ALL) ;` ? Maybe there is a warning... jpeg not being a jpeg or something else – Pierre Granger Aug 01 '17 at 14:06
`Warning: imagecreatefromjpeg(): gd-jpeg: JPEG library reports unrecoverable error` what does it mean? – Patrik Krehák Aug 01 '17 at 14:17
Well... that just mean there is an error, thats a good point ;) take a look at https://stackoverflow.com/a/21045415/2846837 : probably... a jpeg not being a jpeg ;) – Pierre Granger Aug 01 '17 at 14:19
Oh thanks, I will look at it and try some recommendations. – Patrik Krehák Aug 01 '17 at 14:20
I solved the problem - uploaded image has mime type of PNG, but its extension is JPG... I think my clients will kill me one day :) – Patrik Krehák Aug 01 '17 at 14:33

Cannot optimize image in PHP

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