I am using PHP version 5.3 and trying to use mysql_real_escape_string($unescaped_string) in my code, but I get the error:
mysql_real_escape_string($unescaped_string)
Fatal error: Call to u
Maybe your problem resides into the php server config (compiling).
Here more information about the mysql_real_escape_string: http://www.php.net/manual/en/function.mysql-real-escape-string.php