Mega Code Archive
Resizing a displayed image without GD
<![CDATA[
<? // Resizer.php
// I wrote this function so that I could display thumbnails of pictures users
// uploaded without having to actually modify the file. This function will return
// a height and width to put in your <IMG> tag that will be proportionate to each
// other. Again, the actual file is not modified, and GD is NOT required. Modifying
// this to your needs should be pretty simple, but this will give you an idea on
// how to do it.
$pic = "image.jpg"; // This is the name of the image to modify
$dimensions = resize($pic); // Here we call our function to get new
height/width for the image.
// Print it all our
echo "<HTML>\n<BODY>\n";
echo "<img src=\"$pic\" width=\"$dimensions[0]\" height=\"$dimensions[1]\"/>\n";
echo "</BODY>\n</HTML>";
function resize($v_pic) { // This is our main function
$largestside = 120; // This is the size of the LARGEST SIZE we
want either our width or height to be
$size = GetImageSize ("$v_pic"); // Get the actual width/height of the
image...
$width = $size[0];
$height = $size[1];
if ($width == $height) { // If the height == width
$dimensions[0] = $largestside; // Assign both width and height the value of
$largestsize
$dimensions[1] = $largestside;
} elseif ($width > $height) { // If the width is greater than the
height
$divisor = $width / $largestside;
$height = $height / $divisor;
$dimensions[0] = $largestsize; // Assign $largestsize to width
$dimensions[1] = intval ($height); // and assign $height a
proportionate value to $height
} elseif ($width < $height) { // If width is less than height
$divisor = $height / 120;
$width = $width / $divisor;
$dimensions[0] = intval ($width); // Set width to be proportionate to height
$dimensions[1] = 120; // Set height to be $largestsize
}
return $dimensions;
}
?>
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