Resize image with PHP image libraries gd2 and imagick

function smart_resize_image($file,
$width = 0,
$height = 0,
$proportional = false,
$output = ‘file’,
$delete_original = true,
$use_linux_commands = false,
$imagick=FALSE ) {

if ( $height <= 0 && $width <= 0 ) return false; # Setting defaults and meta $info = getimagesize($file); $image = ''; $final_width = 0; $final_height = 0; list($width_old, $height_old) = $info; if($imagick) { /* echo $file; echo '
‘;
echo $output;*/

$im = new imagick($file);
/* create the thumbnail */
$im->thumbnailImage($width,$height,$proportional);
/* Write to a file */
$im->writeImage($output);

}
else
{

//echo $output;

# Calculating proportionality
if ($proportional) {
if ($width == 0) $factor = $height/$height_old;
elseif ($height == 0) $factor = $width/$width_old;
else $factor = min( $width / $width_old, $height / $height_old );

$final_width = round( $width_old * $factor );
$final_height = round( $height_old * $factor );
}
else {
$final_width = ( $width <= 0 ) ? $width_old : $width; $final_height = ( $height <= 0 ) ? $height_old : $height; } # Loading image to memory according to type switch ( $info[2] ) { case IMAGETYPE_GIF: $image = imagecreatefromgif($file); break; case IMAGETYPE_JPEG: $image = imagecreatefromjpeg($file); break; case IMAGETYPE_PNG: $image = imagecreatefrompng($file); break; default: return false; } # This is the resizing/resampling/transparency-preserving magic $image_resized = imagecreatetruecolor( $final_width, $final_height ); if ( ($info[2] == IMAGETYPE_GIF) || ($info[2] == IMAGETYPE_PNG) ) { $transparency = imagecolortransparent($image); if ($transparency >= 0) {
$transparent_color = @imagecolorsforindex($image, $trnprt_indx);
$transparency = imagecolorallocate($image_resized, $trnprt_color[‘red’], $trnprt_color[‘green’], $trnprt_color[‘blue’]);
imagefill($image_resized, 0, 0, $transparency);
imagecolortransparent($image_resized, $transparency);
}
elseif ($info[2] == IMAGETYPE_PNG) {
imagealphablending($image_resized, false);
$color = imagecolorallocatealpha($image_resized, 0, 0, 0, 127);
imagefill($image_resized, 0, 0, $color);
imagesavealpha($image_resized, true);
}
}
imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $final_width, $final_height, $width_old, $height_old);

# Taking care of original, if needed
if ( $delete_original ) {

if ( $use_linux_commands ) exec(‘rm ‘.$file);
else @unlink($file);
}

# Preparing a method of providing result
switch ( strtolower($output) ) {
case ‘browser’:
$mime = image_type_to_mime_type($info[2]);
header(“Content-type: $mime”);
$output = NULL;
break;
case ‘file’:
$output = $file;
break;
case ‘return’:
return $image_resized;
break;
default:
break;
}

# Writing image according to type to the output destination
switch ( $info[2] ) {
case IMAGETYPE_GIF: imagegif($image_resized, $output); break;
case IMAGETYPE_JPEG: imagejpeg($image_resized, $output); break;
case IMAGETYPE_PNG: imagepng($image_resized, $output); break;
default: return false;
}

}
//return true;
}