Think this might do the trick. (Credited original author)
Code:
//Author Alan Reddan Silverarm Solutions
//Date 27/01/2005
//Function that works well with images.
//It takes the image and reduces its size to best fit. i.e If you have an image
//that is 200 X 100 and you want a thumbnail of 75 X 50,
//it first resizes the image to 100 X 50
//and then takes out a portion 75 X 50 from then center of the input image.
//So loads of image information is retained.
//The corollary also holds if your input image is 100 X 200
//it first resizes image to 75 X 150 and then takes out a
//portion 75 X 75 from the centre
// The advantage here is that function decides on whether
//resize is by width or height itself.
//it also decides whether to use the height or the width as the base start point
//in the case that athumbnail is rectangular
function resize_then_crop( $filein,$fileout,$extension,$imagethumbsize_w,$imagethumbsize_h,$red,$green,$blue)
{
$percent = 0.5;
// Get new dimensions
list($width, $height) = getimagesize($filein);
$new_width = $width * $percent;
$new_height = $height * $percent;
switch ($extension)
{
case '.jpg': case '.JPG': case '.JPEG': case '.jpeg':
$format = 'image/jpeg';
$image = imagecreatefromjpeg($filein);
break;
case '.gif': case '.GIF':
$format = 'image/gif';
$image = imagecreatefromgif($filein);
break;
case '.png': case '.PNG':
$format = 'image/png';
$image = imagecreatefrompng($filein);
break;
}
$width = $imagethumbsize_w ;
$height = $imagethumbsize_h ;
list($width_orig, $height_orig) = getimagesize($filein);
if ($width_orig < $height_orig) {
$height = ($imagethumbsize_w / $width_orig) * $height_orig;
} else {
$width = ($imagethumbsize_h / $height_orig) * $width_orig;
}
if ($width < $imagethumbsize_w)
//if the width is smaller than supplied thumbnail size
{
$width = $imagethumbsize_w;
$height = ($imagethumbsize_w/ $width_orig) * $height_orig;;
}
if ($height < $imagethumbsize_h)
//if the height is smaller than supplied thumbnail size
{
$height = $imagethumbsize_h;
$width = ($imagethumbsize_h / $height_orig) * $width_orig;
}
$thumb = imagecreatetruecolor($width , $height);
$bgcolor = imagecolorallocate($thumb, $red, $green, $blue);
ImageFilledRectangle($thumb, 0, 0, $width, $height, $bgcolor);
imagealphablending($thumb, true);
imagecopyresampled($thumb, $image, 0, 0, 0, 0,
$width, $height, $width_orig, $height_orig);
$thumb2 = imagecreatetruecolor($imagethumbsize_w , $imagethumbsize_h);
// true color for best quality
$bgcolor = imagecolorallocate($thumb2, $red, $green, $blue);
//ImageFilledRectangle($thumb2, 0, 0, $imagethumbsize_w , $imagethumbsize_h , $white);
ImageFilledRectangle($thumb2, 0, 0, $imagethumbsize_w , $imagethumbsize_h , $bgcolor);
imagealphablending($thumb2, true);
$w1 =($width/2) - ($imagethumbsize_w/2);
$h1 = ($height/2) - ($imagethumbsize_h/2);
imagecopyresampled($thumb2, $thumb, 0,0, $w1, $h1,
$imagethumbsize_w , $imagethumbsize_h ,$imagethumbsize_w, $imagethumbsize_h);
//Error, this will always return true.
// Output
//header('Content-type: image/gif');
//imagegif($thumb); //output to browser first image when testing
switch ($extension)
{
case '.jpg': case '.JPG': case '.JPEG': case '.jpeg':
imagejpeg($thumb2, $fileout,100);
break;
case '.gif': case '.GIF':
imagegif($thumb2, $fileout) ;
break;
case '.png': case '.PNG':
imagepng($thumb2, $fileout, 100);
break;
}
return true ;
//header('Content-type: image/gif');
//imagegif($thumb2); //output to browser
}
