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POWhy would a PHP image copy and resize script cause a browser to return "Content Encoding Error"?
 

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  1. POWhy would a PHP image copy and resize script cause a browser to return "Content Encoding Error"?
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    <p>I have a PHP script that takes an images, checks type and filesize, then creates 2 resized copies of the master image, all 3 images are saved to the server. I was under the impression everything worked fine. I was testing out script and on one jpg image I got thrown the error "Content Encoding Error" by firefox. Doing some reading suggested this was a Firefox issue but testing in IE and Chrome resulted in similar errors.</p> <p>The odd thing is that some .jpg files work, others don't. For those that don't work the error is occurring when the script comes to encode the second resized copy as the master, and first copy are outputted to specified folder. I have checked to see that the image itself isn't corrupt after doing some more reading. The only difference I could note between a .jpg that would allow the script to complete fully and one that wouldn't was that, when viewing the properties of the failing one within Windows it appeared to carry more data, such as camera used to, model number, etc.</p> <p>Does anyone know what might be causing this error to be thrown?</p> <p>EDIT</p> <p>Here's the code I'm using.</p> <pre><code>$imgsrc = imagecreatefromjpeg($file); imagecopyresampled($thbout,$imgsrc,0,0,0,0,$thbwid,$thbhei,$width,$height); imagejpeg($thbout,$thbpath,80); imagedestroy($thbout); imagecopyresampled($optout,$imgsrc,0,0,0,0,$optwid,$opthei,$width,$height); imagejpeg($optout,$optpath,80); imagedestroy($optout); </code></pre> <p>Having played about a bit tonight I got it working, by switching the code to this. (Switch to create larger file first)</p> <pre><code>$imgsrc = imagecreatefromjpeg($file); imagecopyresampled($optout,$imgsrc,0,0,0,0,$optwid,$opthei,$width,$height); imagejpeg($optout,$optpath,80); imagedestroy($optout); imagecopyresampled($thbout,$imgsrc,0,0,0,0,$thbwid,$thbhei,$width,$height); imagejpeg($thbout,$thbpath,80); imagedestroy($thbout); </code></pre> <p>So I guess my new question becomes, why does it behave like this? </p>
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    1. USdajoto
    1. USdajoto
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    1. COWithout code its just a guess, but the only time ive seen this is when you output from the buffer (or even an error) then try and send the rest of the page/content as gzipped.
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      1. POWhy would a PHP image copy and resize script cause a browser to return "Content Encoding Error"?
      1. USLawrence Cherone
    2. COWhat happens if you strip the metadata from one of your failing images and run your code again? Metadata is supposedly lost when using standard PHP image resize functions so it shouldn't be able to cause a problem (if those are the functions you are using to resize that is)...
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      1. POWhy would a PHP image copy and resize script cause a browser to return "Content Encoding Error"?
      1. USPebbl
    3. COI'm stuck away from my desk for a while but will edit the question with code asap. @pebb I'll try that asap and provide feed back
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      1. POWhy would a PHP image copy and resize script cause a browser to return "Content Encoding Error"?
      1. USdajoto
 

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