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//To resize a imageif(isset($tnsize)){	$tnsize = (integer) $tnsize; if (($tnsize < 20) || ($tnsize > 300))	{		 // If not, it creates an error image and displays it		 $img = imagecreate(150, 150);		 $red = imagecolorallocate($img, 255, 0, 0);		 $yellow = imagecolorallocate($img, 255,255, 0);		 imagestring($img, 4, 20, 20, "Afmetingen", $yellow);		 imagestring($img, 4, 20, 40, "kloppen", $yellow);		 imagestring($img, 4, 20, 60, "niet!", $yellow);		 imagepng($img);		 imagedestroy($img);		 exit();	}		if ($ext == ".jpg" || $ext == "jpeg")	{		$bigimage = @imagecreatefromjpeg($img);	}	if ($ext == ".gif")	{		$bigimage = @imagecreatefromgif($img);	}	if ($ext == ".png" || $ext == "jpeg")	{		$bigimage = @imagecreatefrompng($img);	}	//Create an empty image of the given size	$tnimage = imagecreate($tnsize, $tnsize);	$darkblue = imagecolorallocate($tnimage, 0,0, 127);	imagecolortransparent($tnimage,$darkblue);		//Calculate the resizing image factor	$sz = getimagesize($img);	$x = $sz[0];	$y = $sz[1];	if ($x > $y) 	{		 $dx = 0;		 $w = $tnsize;		 $h = ($y / $x) * $tnsize;		 $dy = ($tnsize - $h) / 2;	}	else	{		 $dy = 0;  		 $h = $tnsize;		 $w = ($x / $y) * $tnsize;		 $dx = ($tnsize - $w) / 2;	}	// Resizes the image	imagecopyresized($tnimage, $bigimage, $dx, $dy, 0, 0, $w, $h,$x, $y);		// Displays the image	imagepng($tnimage);	// Clears the variables	imagedestroy($tnimage);	imagedestroy($bigimage);}else{	if($config["type"]=="redirect"){		header("Location: ".$url.$img);	}	else if($config["type"]=="readfile"){		readfile($pathtoread."/".$img);	}	else	{		echo "Error: unknown displaytype";	}}