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https://github.com/wbbaddons/Tims-Chat.git
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38 lines
1.2 KiB
PHP
38 lines
1.2 KiB
PHP
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<?php
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namespace \wcf\util;
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/**
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* Chat utilities
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*
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* @author Tim Düsterhus
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* @copyright 2010-2011 Tim Düsterhus
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* @license Creative Commons Attribution-NonCommercial-ShareAlike <http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode>
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* @package timwolla.wcf.chat
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* @subpackage util
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*/
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class ChatUtil {
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/**
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* Creates a gradient out of two colors represented by an integer.
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* The first byte is red, the second byte is green, the third one is blue.
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* The numbers can be easily expressed in hexadecimal notation: 0xFF0000 being red.
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*
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* @param string $string
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* @param integer $start
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* @param integer $end
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* @returen string
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*/
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public static function gradient($string, $start, $end) {
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$string = str_split($string);
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$r = (int) ((($start >> 16 & 255) - ($end >> 16 & 255)) / (count($string) - 1));
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$g = (int) ((($start >> 8 & 255) - ($end >> 8 & 255)) / (count($string) - 1));
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$b = (int) ((($start & 255) - ($end & 255)) / (count($string) - 1));
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$result = '';
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for ($i = 0, $max = count($string); $i < $max; $i++) {
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$result .= '<span style="color:rgb('.(($start >> 16 & 255) - $i * $r).','.(($start >> 8 & 255) - $i * $g).','.(($start & 255) - $i * $b).')">'.$string[$i].'</span>';
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}
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return $result;
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}
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}
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