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    <p>Please forgive me if there are any typos or anything in the following code. I haven't tested it. What I've done here is calculate whether the height or the width is the proportion that's too long. Then adjust the source dimension to match the final image dimension. Also, adjust the center of the side that we shrunk so the cropped image is centered.</p> <pre><code> $newwidth = 500; $newheight = 375; $tmp = imagecreatetruecolor($newwidth, $newheight); $widthProportion = $width / $newwidth; $heightProportion = $height / $newheight; if ($widthProportion &gt; $heightProportion) { // width proportion is greater than height proportion // figure out adjustment we need to make to width $widthAdjustment = ($width * ($widthProportion - $heightProportion)); // Shrink width to proper proportion $width = $width - $widthAdjustment; $x = 0; // No adjusting height position $y = $y + ($widthAdjustment / 2); // Center the adjustment } else { // height proportion is greater than width proportion // figure out adjustment we need to make to width $heightAdjustment = ($height * ($heightProportion - $widthProportion)); // Shrink height to proper proportion $height = $height - $heightAdjustment; $x = $x + ($heightAdjustment / 2); // Center the ajustment $y = 0; // No adjusting width position } imagecopyresampled($tmp, $src, 0, 0, $x, $y, $newwidth, $newheight, $width, $height); </code></pre> <p>So basically with the $width and $height variables you are specifying how much of the picture you want (cropping). and with the $x, $y we're saying where we want to crop the picture. The rest is just the standard resizing to fit the full new image.</p> <p>I hope that helps!</p>
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