Convert GD image back to binary data

Question

I have a GD image resource created from imagecreatefromstring. After some image operations, I want to convert it back to binary data. How would I do this? Can't see any functions in the manual...

Community · Accepted Answer · 2023-11-17 20:42:18Z

9

Use imagejpeg, imagepng, or similar. Use output buffering if you want to dump the result to a string, rather than a file:

ob_start();
imagejpeg($im);
$image_string = ob_get_contents();
ob_end_flush();

edited Nov 17, 2023 at 20:42

CommunityBot

11 silver badge

answered Feb 5, 2010 at 14:41

user7675

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1 Comment

Ben Shoval Over a year ago

change ob_end_flush() to ob_end_clean() if you don't want the buffer echo'd

andrea · Accepted Answer · 2012-10-01 11:14:20Z

5

function image_data($gdimage)
{
    ob_start();
    imagejpeg($gdimage);
    return(ob_get_clean());
}

answered Oct 1, 2012 at 11:14

andrea

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