<?php 
function createthumb($name,$filename,$new_w,$new_h)
{
	//echo "thumb $name,$filename <br>--------<br>";
	$system=explode('.',$name);
	if (preg_match('/jpg|jpeg|JPG|JPEG/',$system[1])){
		$src_img=imagecreatefromjpeg($name);
	}
	if (preg_match('/gif|GIF/',$system[1])){
		$src_img=imagecreatefromgif($name);
	}
	if (preg_match('/png|PNG/',$system[1])){
		$src_img=imagecreatefrompng($name);
	}

	$old_x=imageSX($src_img);
	$old_y=imageSY($src_img);
	if ($old_x > $old_y) {
		/*$thumb_w=$new_w;
		$thumb_h=$old_y*($new_h/$old_x);*/
		$thumb_w=$old_x*($new_w/$old_y);
		$thumb_h=$new_h;
	}
	if ($old_x < $old_y) {
		$thumb_w=$old_x*($new_w/$old_y);
		$thumb_h=$new_h;
	}
	if ($old_x == $old_y) {
		$thumb_w=$new_w;
		$thumb_h=$new_h;
	}

	$dst_img = imagecreatetruecolor($thumb_w,$thumb_h);
	imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); 
	$red = imagecolorallocate($dst_img, 255, 0, 0);
	$green = imagecolorallocate($dst_img, 0, 255, 0);
	$blue = imagecolorallocate($dst_img, 0, 0, 255);
	$black = imagecolorallocate($dst_img, 0, 0, 0);
	// Make the background transparent
	imagecolortransparent($dst_img, $black);

	// Draw a red rectangle
	imagefilledrectangle($dst_img, 4, 4, 50, 25, $red, $green, $blue);


	if (preg_match("/png|PNG/",$system[1])){		
		imagepng($dst_img, './imagecolortransparent.png'); 
	} else if (preg_match("/gif|GIF/",$system[1])) {
		imagegif($dst_img, './imagecolortransparent.gif'); 
	} else {
		imagejpeg($dst_img,$filename); 
	}
	imagedestroy($dst_img); 
	imagedestroy($src_img); 
}

//This function return a filename with a postfix    
function thumbName ($filename, $postfix) { 
	//$filename 	= strtolower($filename) ; 
	$filesplit	= split("[.]", $filename) ; 
	$n 			= count($filesplit)-1; 
	$exts		= $filesplit[$n]; 
	$target 	= "";
	
 	foreach ($filesplit as $value) {		
		if ($value == $exts) {				
				$target .= "t";
		}
    	$target .= ".".$value;		
	}	
	$target	= split("[/\\.]", $target, 2) ; 
	
	return $target[1]; 
}

?>