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copied!<p>I suggest you follow this approach:</p> <pre><code>// if you need the image type $type = exif_imagetype($url); // if you need the image mime type $type = image_type_to_mime_type(exif_imagetype($url)); // if you need the image extension associated with the mime type $type = image_type_to_extension(exif_imagetype($url)); // if you don't care about the image type ignore all the above code $image = ImageCreateFromString(file_get_contents($url)); echo ImageSX($image); // width echo ImageSY($image); // height </code></pre> <p>Using <code>exif_imagetype()</code> is a lot faster than <code>getimagesize()</code>, the same goes for <code>ImageSX()</code> / <code>ImageSY()</code>, plus they don't return arrays <strong>and</strong> can also return the correct image dimension after the image has been resized or cropped for instance.</p> <p>Also, using <code>getimagesize()</code> on URLs isn't good because it'll consume much more bandwidth than the alternative <code>exif_imagetype()</code>, from the <a href="http://pt.php.net/manual/en/function.exif-imagetype.php" rel="noreferrer">PHP Manual</a>:</p> <blockquote> <p>When a correct signature is found, the appropriate constant value will be returned otherwise the return value is FALSE. The return value is the same value that <code>getimagesize()</code> returns in index 2 but <code>exif_imagetype()</code> is much faster.</p> </blockquote> <p>That's because <code>exif_imagetype()</code> will only read the first few bytes of data.</p>

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