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Description Hello, your friend is suggesting this link: http://www.codestacker.com/codes/24

   1  <?
   2  ////////////////////////////////////////////////////////////////////////////////////
   3  // generate a croped-image from a picture
   4  // source: http://mediumexposure.com/techblog/smart-image-resizing-while-preserving-transparency-php-and-gd-library
   5  // resizes a image, without crop
   6  // usage: resizeImage("test/6.jpg", "540", "720", true, "test/output.jpg")
   7  ////////////////////////////////////////////////////////////////////////////////////
   8  
   9  function resizeImage( $file, $width = 0, $height = 0, $proportional = false, $output = 'file') {
  10  	$info = getimagesize($file);
  11  	$image = '';
  12  	$final_width = 0;
  13  	$final_height = 0;
  14  	list($width_old, $height_old) = $info;
  15  	if ($proportional) {
  16  		if ($width == 0) $factor = $height/$height_old;
  17  		elseif ($height == 0) $factor = $width/$width_old;
  18  		else $factor = min ( $width / $width_old, $height / $height_old);  
  19  		$final_width = round ($width_old * $factor);
  20  		$final_height = round ($height_old * $factor);
  21  	}
  22  	else {
  23  		$final_width = ( $width <= 0 ) ? $width_old : $width;
  24  		$final_height = ( $height <= 0 ) ? $height_old : $height;
  25  	}
  26  	switch ( $info[2] ) {
  27  		case IMAGETYPE_GIF:
  28  			$image = imagecreatefromgif($file);
  29  		break;
  30  		case IMAGETYPE_JPEG:
  31  			$image = imagecreatefromjpeg($file);
  32  		break;
  33  		case IMAGETYPE_PNG:
  34  			$image = imagecreatefrompng($file);
  35  		break;
  36  		default:
  37  			return false;
  38  	}
  39          
  40  	$image_resized = imagecreatetruecolor( $final_width, $final_height );
  41  			
  42  	if ( ($info[2] == IMAGETYPE_GIF) || ($info[2] == IMAGETYPE_PNG) ) {
  43  		$trnprt_indx = imagecolortransparent($image);
  44  
  45  		if ($trnprt_indx >= 0) {
  46  			$trnprt_color    = imagecolorsforindex($image, $trnprt_indx);
  47  			$trnprt_indx    = imagecolorallocate($image_resized, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
  48  			imagefill($image_resized, 0, 0, $trnprt_indx);
  49  			imagecolortransparent($image_resized, $trnprt_indx);
  50  		} 
  51  		elseif ($info[2] == IMAGETYPE_PNG) {
  52  			imagealphablending($image_resized, false);
  53  			$color = imagecolorallocatealpha($image_resized, 0, 0, 0, 127);
  54  			imagefill($image_resized, 0, 0, $color);
  55  			imagesavealpha($image_resized, true);
  56  		}
  57  	}
  58  	imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $final_width, $final_height, $width_old, $height_old);    
  59          
  60  	switch ( strtolower($output) ) {
  61  		case 'browser':
  62  			$mime = image_type_to_mime_type($info[2]);
  63  			header("Content-type: $mime");
  64  			$output = NULL;
  65  		break;
  66  		case 'file':
  67  			$output = $file;
  68  		break;
  69  		case 'return':
  70  			return $image_resized;
  71  		break;
  72  		default:
  73  		break;
  74  	}
  75  	switch ( $info[2] ) {
  76  		case IMAGETYPE_GIF:
  77  			imagegif($image_resized, $output);
  78  		break;
  79  		case IMAGETYPE_JPEG:
  80  			imagejpeg($image_resized, $output);
  81  		break;
  82  		case IMAGETYPE_PNG:
  83  			imagepng($image_resized, $output);
  84  		break;
  85  		default:
  86  			return false;
  87  	}
  88  	return true;
  89  }
  90  ?>