php - Function page syntax error -

i can't find missing curly brace, getting message "parse error: syntax error, unexpected $end in /site/public_html/core/functions/users.php on line 75"

for following code..

<?php  function activate($email, $email_code) {     $email = mysql_real_escape_string($email);     $email_code = mysql_real_escape_string($email_code);      if (mysql_result(mysql_query("select count(`user_id`) `users` `email` = '$email' , `email_code` = '$email_code' , `active` = 0"), 0) == 1) {         mysql_query("update `users` set `active` = 1 `email` = '$email'");         return true;     }     else {         return false;     }   function change_password ($user_id, $password) {     $user_id = (int)$user_id;     $password = md5($password);      mysql_query("update `users` set `password` = '$password' `user_id` = $user_id"); }  function register_user($register_data) {     array_walk($register_data, 'array_sanitize');     $register_data['password'] = md5($register_data['password']);      $fields = '`' . implode('`, `', array_keys($register_data)) . '`';     $data = '\'' . implode('\', \'', $register_data) . '\'';      mysql_query("insert `users` ($fields) values ($data)");     email($register_data['email'], 'activate account', "     hello " . $register_data['username'] . ", \n\n need activate account, use     link below: \n\nhttp://www.mysite.com/activate.php?email=" . $register_data['email'] .   "&email_code=" . $register_data['email_code'] . "\n\n~admin~ "); }  function user_count() {     return mysql_result(mysql_query("select count('user_id') `users` `active` =  1"), 0); }  function user_data($user_id) {     $data = array();     $user_id = (int)$user_id;      $func_num_args = func_num_args();     $func_get_args = func_get_args();      if ($func_num_args &gt; 1) {         unset($func_get_args[0]);          $fields = '`' . implode('`, `', $func_get_args) . '`';         $data = mysql_fetch_assoc(mysql_query("select $fields `users` `user_id` =   $user_id"));          return $data;     }  }  function logged_in() {     return (isset($_session['user_id'])) ? true : false; }  function user_exists($username) {     $username = sanitize($username);     return (mysql_result(mysql_query("select count(`user_id`) `users` `username` = '$username'"), 0) == 1) ? true : false; }  function email_exists($email) {     $email = sanitize($email);     return (mysql_result(mysql_query("select count(`user_id`) `users` `email` = '$email'"), 0) == 1) ? true : false; }  function user_active($username) {     $username = sanitize($username);     return (mysql_result(mysql_query("select count(`user_id`) `users` `username` = '$username' , `active` =1"), 0) ==1) ? true : false; }  function user_id_from_username ($username) {     $username = sanitize($username);     return (mysql_result(mysql_query("select `user_id` `users` `username` = '$username'"), 0, 'user_id')); }  function login ($username, $password) {     $user_id = user_id_from_username($username);      $username = sanitize($username);     $password = md5($password);      return (mysql_result(mysql_query("select count(`user_id`) `users` `username` = '$username' , `password` = '$password'"), 0) == 1) ? $user_id : false; }  ?> 

thanks help.

you missed }

it should be

function activate($email, $email_code) { $email = mysql_real_escape_string($email); $email_code = mysql_real_escape_string($email_code);  if (mysql_result(mysql_query("select count(`user_id`) `users` `email` = '$email' , `email_code` = '$email_code' , `active` = 0"), 0) == 1) { mysql_query("update `users` set `active` = 1 `email` = '$email'"); return true; } else { return false; } } <---missing bracket here