Mine

function tagtext($text, $lang, $data) {    $start = '{'.$lang.'}';    $end = '{/'.$lang.'}';	$pos1 = strpos($text, $start); 	if(!is_integer($pos1)) {		$res = $text.$start.$data.$end;		return $res;	} 	$pos1 += strlen($start); 	$pos2 = strpos($text, $end, $pos1); 	if(!is_integer($pos2)) {		$pos = false;		return false;	} 	$t1 = substr($text, 0, $pos1);	$t2 = substr($text, $pos2);	$res = $t1.$data.$t2;	return $res;}