keep proportions - resize png with transperent colors, and some other adjustments

<?php
function smart_resize_image( $file, $width = 0, $height = 0, $proportional = false, $output = 'file', $delete_original = true, $use_linux_commands = false, $allocatetransparent = false )//hack
    {
        if ( $height <= 0 && $width <= 0 ) {
            return false;
        } 
 
        $info = getimagesize($file);
        $image = '';
 
        $final_width = 0;
        $final_height = 0;
        list($width_old, $height_old) = $info;
 
        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;
        }
 
        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;
        }
		
        $image_frame   = imagecreatetruecolor( $width, $height );    //hack
		
        $image_resized = imagecreatetruecolor( $final_width, $final_height );
                
        if ( ($info[2] == IMAGETYPE_GIF) || ($info[2] == IMAGETYPE_PNG)  || ($allocatetransparent=true) ) {//hack
            $trnprt_indx = imagecolortransparent($image);
   
            // If we have a specific transparent color
            if ($trnprt_indx >= 0) {
   
                // Get the original image's transparent color's RGB values
                $trnprt_color    = imagecolorsforindex($image, $trnprt_indx);
   
                // Allocate the same color in the new image resource
                $trnprt_indx    = imagecolorallocate($image_resized, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
   
                // Completely fill the background of the new image with allocated color.
                imagefill($image_resized, 0, 0, $trnprt_indx);
			   	 imagefill($image_frame, 0, 0, $trnprt_indx);    //hack
   
                // Set the background color for new image to transparent
                imagecolortransparent($image_resized, $trnprt_indx);
   				 imagecolortransparent($image_frame, $trnprt_indx);    //hack
            
            } 
            // Always make a transparent background color for PNGs that don't have one allocated already
            elseif ( ($info[2] == IMAGETYPE_PNG) || ($allocatetransparent=true) ) {//hack
   				echo "allocatetransparent";
                // Turn off transparency blending (temporarily)
                imagealphablending($image_resized, false);
   				 imagealphablending($image_frame, false);    //hack
				 
                // Create a new transparent color for image
                $color = imagecolorallocatealpha($image_resized, 0, 0, 0, 127);
   				 $color = imagecolorallocatealpha($image_frame, 0, 0, 0, 127);    //hack
				
                // Completely fill the background of the new image with allocated color.
                imagefill($image_resized, 0, 0, $color);
   				 imagefill($image_frame, 0, 0, $color);    //hack
				 
                // Restore transparency blending
                imagesavealpha($image_resized, true);
				 imagesavealpha($image_frame, true);    //hack
            }
        }
 
        imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $final_width, $final_height, $width_old, $height_old);
    //hack
	imagecopy ( $image_frame ,  $image_resized , 0 , 0 , 0 , 0 , $final_width , $final_height );
	 $image_resized = $image_frame;
	 
        if ( $delete_original ) {
            if ( $use_linux_commands )
                exec('rm '.$file);
            else
                @unlink($file);
        }
        
        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;
        }
 
        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;
    }
?>

                                              

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<?php
function smart_resize_image( $file, $width = 0, $height = 0, $proportional = false, $output = 'file', $delete_original = true, $use_linux_commands = false, $forcetransparentbox = false )//hack
    {
        if ( $height <= 0 && $width <= 0 ) {
            return false;
        } 
 
        $info = getimagesize($file);
        $image = '';
 
        $final_width = 0;
        $final_height = 0;
        list($width_old, $height_old) = $info;
 
        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;
        }
 
        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;
        }
		
        $image_frame   = imagecreatetruecolor( $width, $height );    //hack
		
        $image_resized = imagecreatetruecolor( $final_width, $final_height );
                
        if ( ($info[2] == IMAGETYPE_GIF) || ($info[2] == IMAGETYPE_PNG)  || ($forcetransparentbox=true) ) {//hack
            $trnprt_indx = imagecolortransparent($image);
   
            // If we have a specific transparent color
            if ($trnprt_indx >= 0) {
   
                // Get the original image's transparent color's RGB values
                $trnprt_color    = imagecolorsforindex($image, $trnprt_indx);
   
                // Allocate the same color in the new image resource
                $trnprt_indx    = imagecolorallocate($image_resized, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
   
                // Completely fill the background of the new image with allocated color.
                imagefill($image_resized, 0, 0, $trnprt_indx);
			   	 imagefill($image_frame, 0, 0, $trnprt_indx);    //hack
   
                // Set the background color for new image to transparent
                imagecolortransparent($image_resized, $trnprt_indx);
   				 imagecolortransparent($image_frame, $trnprt_indx);    //hack
            
            } 
            // Always make a transparent background color for PNGs that don't have one allocated already
            elseif ( ($info[2] == IMAGETYPE_PNG) || ($forcetransparentbox=true) ) {//hack
   				echo "allocatetransparent";
                // Turn off transparency blending (temporarily)
                imagealphablending($image_resized, false);
   				 imagealphablending($image_frame, false);    //hack
				 
                // Create a new transparent color for image
                $color = imagecolorallocatealpha($image_resized, 0, 0, 0, 127);
   				 $color = imagecolorallocatealpha($image_frame, 0, 0, 0, 127);    //hack
				
                // Completely fill the background of the new image with allocated color.
                imagefill($image_resized, 0, 0, $color);
   				 imagefill($image_frame, 0, 0, $color);    //hack
				 
                // Restore transparency blending
                imagesavealpha($image_resized, true);
				 imagesavealpha($image_frame, true);    //hack
            }
        }
 
        imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $final_width, $final_height, $width_old, $height_old);
    //hack
	if($forcetransparentbox){
		imagecopy ( $image_frame ,  $image_resized , 0 , 0 , 0 , 0 , $final_width , $final_height );
	 	$image_resized = $image_frame;
	};
	 
        if ( $delete_original ) {
            if ( $use_linux_commands )
                exec('rm '.$file);
            else
                @unlink($file);
        }
        
        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;
        }
 
        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;
    }
?>

                                              

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$cropSize_width = $final_width;
$cropSize_height = $final_height;
 
$cropX = intval(($width - $cropSize_width) / 2);
$cropY = intval(($height - $cropSize_height) / 2);
		
imagecopy ( $image_frame ,  $image_resized , $cropX , $cropY , 0 , 0 , $final_width , $final_height );
$image_resized = $image_frame;
                                              

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	if($forcetransparentbox){
		//find new coordinates to center the image
	    $newX = intval(($width - $final_width) / 2);
	    $newY = intval(($height - $final_height) / 2);
		
		imagecopy ( $image_frame ,  $image_resized , $newX , $newY , 0 , 0 , $final_width , $final_height );
	 	$image_resized = $image_frame;
	};

                                              

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<?php
function smart_resize_image( $file, $width = 0, $height = 0, $proportional = false, $output = 'file', $delete_original = true, $use_linux_commands = false, $forcetransparentbox = false )//hack
    {
        if ( $height <= 0 && $width <= 0 ) {
            return false;
        } 
 
        $info = getimagesize($file);
        $image = '';
 
        $final_width = 0;
        $final_height = 0;
        list($width_old, $height_old) = $info;
 
        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;
        }
 
        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;
        }
		
        $image_frame   = imagecreatetruecolor( $width, $height );    //hack
		
        $image_resized = imagecreatetruecolor( $final_width, $final_height );
                
        if ( ($info[2] == IMAGETYPE_GIF) || ($info[2] == IMAGETYPE_PNG)  || ($forcetransparentbox=true) ) {//hack
            $trnprt_indx = imagecolortransparent($image);
   
            // If we have a specific transparent color
            if ($trnprt_indx >= 0) {
   
                // Get the original image's transparent color's RGB values
                $trnprt_color    = imagecolorsforindex($image, $trnprt_indx);
   
                // Allocate the same color in the new image resource
                $trnprt_indx    = imagecolorallocate($image_resized, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
   
                // Completely fill the background of the new image with allocated color.
                imagefill($image_resized, 0, 0, $trnprt_indx);
			   	 imagefill($image_frame, 0, 0, $trnprt_indx);    //hack
   
                // Set the background color for new image to transparent
                imagecolortransparent($image_resized, $trnprt_indx);
   				 imagecolortransparent($image_frame, $trnprt_indx);    //hack
            
            } 
            // Always make a transparent background color for PNGs that don't have one allocated already
            elseif ( ($info[2] == IMAGETYPE_PNG) || ($forcetransparentbox=true) ) {//hack
                // Turn off transparency blending (temporarily)
                imagealphablending($image_resized, false);
   				 imagealphablending($image_frame, false);    //hack
				 
                // Create a new transparent color for image
                $color = imagecolorallocatealpha($image_resized, 0, 0, 0, 127);
   				 $color = imagecolorallocatealpha($image_frame, 0, 0, 0, 127);    //hack
				
                // Completely fill the background of the new image with allocated color.
                imagefill($image_resized, 0, 0, $color);
   				 imagefill($image_frame, 0, 0, $color);    //hack
				 
                // Restore transparency blending
                imagesavealpha($image_resized, true);
				 imagesavealpha($image_frame, true);    //hack
            }
        }
 
        imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $final_width, $final_height, $width_old, $height_old);
		
		if($forcetransparentbox){//hack
			//find new coordinates to center the image
			$newX = intval(($width - $final_width) / 2);
			$newY = intval(($height - $final_height) / 2);
			
			imagecopy ( $image_frame ,  $image_resized , $newX , $newY , 0 , 0 , $final_width , $final_height );
			$image_resized = $image_frame;
		};
	 
        if ( $delete_original ) {
            if ( $use_linux_commands )
                exec('rm '.$file);
            else
                @unlink($file);
        }
        
        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;
        }
 
        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;
    }
?>

                                              

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