Градент текст

function str2gradient($text,$from='', $to='', $mode="hex")
{
if($mode=="hex")
{
$to = hexdec($to[0].$to[1]).",".hexdec($to[2].$to[3]).",".hexdec($to[4].$to[5]);
$from = hexdec($from[0].$from[1]).",".hexdec($from[2].$from[3]).",".hexdec($from[4].$from[5]);
}
 
if( empty($text) )
return '';
else
$levels=strlen($text);
 
if (empty($from))
$from = array(0,0,255);
else
$from = explode(",", $from);
 
if (empty($to))
 
$to = array(255,0,0);
else
$to = explode(",", $to);
 
$output = "";
 
for ($i=1;$i<=$levels;$i++)
{
for ($ii=0;$ii<4;$ii++)
{
 
$tmp[$ii] = $from[$ii] - $to[$ii];
$tmp[$ii] = floor($tmp[$ii] / $levels);
$rgb[$ii] = $from[$ii] -($tmp[$ii] * $i);
 
if ($rgb[$ii] > 255) $rgb[$ii] = 255;
 
$rgb[$ii] = dechex($rgb[$ii]);
$rgb[$ii] = strtoupper($rgb[$ii]);
 
if (strlen($rgb[$ii]) < 2) $rgb[$ii] = "0$rgb[$ii]";
}
$output .= "<font color="#".$rgb[0].$rgb[1].$rgb[2]."">" . $text[$i -1 ] . "</font>";
}
return $output."n";
}
echo str2gradient("Привет, я Градиент!", "f11717", "21f117");