Matching colours to image colours with PHP

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function fetch_hexcodes($image)
{
	//fetchs the array of all colours in image
	$tmp = fetch_palette($image);
	//sorts the colours by the most commonly used
	arsort($tmp);
 
	//vars necessary for looping
	$c = 1;
	$img = imagecreatefromjpeg($image);
 
	//runs through and fetchs the RGB indexes for the most
       //common 5 colours
	foreach ($tmp as $key => $val)
	{
		if ($c < 6)
		{
			$topColours[$c] = imagecolorsforindex($img, $key);
			$c++;
		}
	}
 
	//vars necessary for looping
	$c = 1;
	$c2 = 0;
	//this loop constructs the rgb codes into
       //hexidecimal values so they
	//are ready to be used inside the html code
	while ($topColours[$c])
	{
		$hexlist[$c2] = '#'. dechex($topColours[$c]['red']) . 
dechex($topColours[$c]['green']) . dechex($topColours[$c]['blue']);
		$c2++;
		$c++;
	}
 
	//returns the array of colours
	return $hexlist;
}
 
function fetch_palette($img)
{
	//fetchs image size for later comparison
	$imgDetails = getimagesize($img);
 
	//vars necessary for looping
	$x = 1;
	$y = 1;
	$img = imagecreatefromjpeg($img);
 
	//This double loop runs through every single
       //pixel on the submitted image
	while ($y <= intval($imgDetails[1]))
	{
		while ($x <= intval($imgDetails[0]))
		{
			//assign the colour value for the pixel
                       //being processed
			$colour = imagecolorat($img, $x, $y);
			//checks if the colour is in the array
                       //or not and
			//populates the array accordingly.
			if ($colours[$colour])
			{
				$colours[$colour]++;
			}
			else
			{
				$colours[$colour] = 1;
			}
 
			$x++;
		}
		//x-axis is necessary to run through it
               //once for each y-axis
		//so it is reset here ready for the next y-axis loop
		$x = 1;
		$y++;	
	}
	//returns the list of raw colour values ready for processing.
	return $colours;
}
 
?>