<?php

    function hextorgb ($hex) {
        $hex = str_replace("#", "", $hex);

        $return['r'] = hexdec(substr($hex, 0, 2));
        $return['g'] = hexdec(substr($hex, 2, 2));
        $return['b'] = hexdec(substr($hex, 4, 2));

        return $return;
    }

    function rgbtohex ($r, $g, $b) {
        return "#" . dechex($r) . dechex($g) . dechex($b);
    }


    $hex['from'] = '000000';
    $hex['to'] = 'FFFFFF';


    $ursprung = hextorgb($hex['from']);
    $ziel = hextorgb($hex['to']);

    $width = 5;
    $height = 5;





    $sum = ($width * $height);

    $calc['r'] = (($ziel['r'] - $ursprung['r']) / $sum);
    $calc['g'] = (($ziel['g'] - $ursprung['g']) / $sum);
    $calc['b'] = (($ziel['b'] - $ursprung['b']) / $sum);


    for ($i = 0; $i < $width; $i++) {
        for ($x = 0; $x < $height; $x++) {
            echo '<inline style="width:50px; height:50px; background:rgb(' . round(((($i * $width) + $x) * $calc['r']) + $ursprung['r']) . ',' . round(((($i * $width) + $x) * $calc['g']) + $ursprung['g']) . ',' . round(((($i * $width) + $x) * $calc['b']) + $ursprung['b']) . ')">' . $i . ' . ' . $x .  '</inline>';
        }
        echo '<br />';
    }



?>