ignorace diskritiy

function zvyraznit($slovo,$text) {
	$a = array ("%20",";","+",":"," ","'",'"',"!","¨","=",",",".","-","_","*","(",")","#","&","@","{","}","<",">","´","ˇ","/","|","\\","%");
	$b = "|";
	$var = str_replace($a,$b,$slovo);
	
	$slovo2 = explode("|",$var);
	$pocet_slov = count($slovo2);
	$slovo22 = array();
	for ($x=0;$x<$pocet_slov;$x++) {
		if ($slovo2[$x] != $slovo2[$x-1] and $slovo2[$x] != "") {
			$slovo22[$x] = $slovo2[$x];
		}
	}
array_walk($slovo22, create_function('&$value, $key', '$value = preg_quote($value, \'~\');'));

return preg_replace('~('.implode('|', $slovo22).')~i', '<span class="zvyraznit">\\1</span>', $text);
}