语法错误，意外'：'

I have the code below, and when i load it i always get this error..

function newPlayer($wallet) {
  generate_: {
    $hash=generateHash(32);
    }
  if (mysql_num_rows(mysql_query("SELECT `id` FROM `players` WHERE `hash`='$hash' LIMIT 1"))!=0) goto generate_;
      $alias='Player_';
      $alias_i=mysql_fetch_array(mysql_query("SELECT `autoalias_increment` AS `data` FROM `system` LIMIT 1"));
      $alias_i=$alias_i['data'];
      mysql_query("UPDATE `system` SET `autoalias_increment`=`autoalias_increment`+1 LIMIT 1");
      mysql_query("INSERT INTO `players` (`hash`,`alias`,`time_last_active`,`server_seed`) VALUES ('$hash','".$alias.$alias_i."',NOW(),'".generateServerSeed()."')");
      header('Location: ./?unique='.$hash.'# Do Not Share This URL!');
      exit();
}

The error:

Parse error: syntax error, unexpected ':' in /home/a1180044/public_html/inc/functions.php on line 49

Line 49 is generate_:

Try to not use goto, as much as you can.

By using goto you will be lost in your own code, because you have to search each time where your goto is pointing.

Here you can do what you want by writing :

if (mysql_num_rows(mysql_query("SELECT `id` FROM `players` WHERE `hash`='$hash' LIMIT 1"))!=0) {
    $hash=generateHash(32);
}