How can you tell the dimensions of a .jpeg or .png file without opening it?
If it is impossible to determine the dimensions, how can I automatically crop an image?
I am using PHP and JS.
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what you want find image width and height because dimension includes height and width.gd lib is best solution. – Ankur Saxena Nov 17 '12 at 10:54
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3What do you mean by "not opening" it? – complex857 Nov 17 '12 at 10:55
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Where do you need the dimensions in PHP or in JS? – Nandakumar V Nov 17 '12 at 10:55
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Your question is a duplicate http://stackoverflow.com/questions/3334097/quickest-way-to-dynamically-retrieve-image-dimensions - save for the 'not opening' bit. http://stackoverflow.com/questions/1855996/crop-image-in-php – Mike B Nov 17 '12 at 10:57
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1there is no specific way to automatically crop an image. – Ankur Saxena Nov 17 '12 at 10:59
1 Answers
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list($width, $height) = getimagesize("img.jpg");
or
$im=imagecreatefromjpeg("image_testin_1.JPG");
imagetruecolortopalette($im, false, 255);
$w = imagesx($im);//provide width of full page
$h = imagesy($im);//provide height of full page
Ankur Saxena
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