ubb fout cannot redeclare kleuren() on line 2

<?
function kleuren($text){
		if (floor(phpversion())<4) {
    		$buffer=$text;
  		} else {
        $text = str_replace("<br>", "", $text);
        $text = str_replace("<br />", "", $text);
        $text = str_replace("&gt;", ">", $text);
        $text = str_replace("&lt;", "<", $text);
        $text = str_replace("&quot;", "\"", $text);

        $text = str_replace("&amp;", "&", $text);
        $text = str_replace('$', '\$', $text);
        $text = str_replace('\n', '\\\\n', $text);
        $text = str_replace('\r', '\\\\r', $text);
        $text = str_replace('\t', '\\\\t', $text);

        if (!strpos($text,"<?") and substr($text,0,2)!="<?") {
            $text="<?\n".trim($text)."\n?>";
            $addedtags=1;
        }

<?
function kleuren($text){
		if (floor(phpversion())<4) {
    		$buffer=$text;
  		} else {
        $text = str_replace("<br>", "", $text);
        $text = str_replace("<br />", "", $text);
        $text = str_replace("&gt;", ">", $text);
        $text = str_replace("&lt;", "<", $text);
        $text = str_replace("&quot;", "\"", $text);
 
        $text = str_replace("&amp;", "&", $text);
        $text = str_replace('$', '\$', $text);
        $text = str_replace('\n', '\\\\n', $text);
        $text = str_replace('\r', '\\\\r', $text);
        $text = str_replace('\t', '\\\\t', $text);
 
        if (!strpos($text,"<?") and substr($text,0,2)!="<?") {
            $text="<?\n".trim($text)."\n?>";
            $addedtags=1;
        }