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Full Discussion: city wide connection
Top Forums UNIX for Dummies Questions & Answers city wide connection Post 302192176 by era on Tuesday 6th of May 2008 07:51:20 AM
Old 05-06-2008
Firewalls etc are just the start, you don't want anybody to be able to DOS the terminals just by sending them lots of junk packets or whatever. The less you expose to the rest of the world, the better. For security, it might even be better to use some obscure frequency or protocol which would-be intruders might not even detect simply by bringing a laptop and run wireshark for a while.

For securing the actual communications, I guess regular VPN solutions should work.

You might get more useful feedback from some embedded developers forum or some such. If you are going to be using e.g. QNX or something then those guys probably have lots more field experience of similar deployments.
 

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MAXDB_REAL_ESCAPE_STRING(3)						 1					       MAXDB_REAL_ESCAPE_STRING(3)

maxdb_real_escape_string - Escapes special characters in a string for use in an SQL statement, taking into account the current charset of the con-
nection

       Procedural style

SYNOPSIS
string maxdb_real_escape_string (resource $link, string $escapestr) DESCRIPTION
Object oriented style string maxdb::real_escape_string (string $escapestr) This function is used to create a legal SQL string that you can use in an SQL statement. The string escapestr is encoded to an escaped SQL string, taking into account the current character set of the connection. Characters encoded are ', ". RETURN VALUES
Returns an escaped string. EXAMPLES
Example #1 Object oriented style <?php $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s ", maxdb_connect_error()); exit(); } $maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city"); $city = "'s Hertogenbosch"; /* this query will fail, cause we didn't escape $city */ if (!$maxdb->query("INSERT into temp.mycity VALUES ('11111','$city','NY')")) { printf("Error: %s ", $maxdb->sqlstate); } $city = $maxdb->real_escape_string($city); /* this query with escaped $city will work */ if ($maxdb->query("INSERT into temp.mycity VALUES ('22222','$city','NY')")) { printf("%d Row inserted. ", $maxdb->affected_rows); } $maxdb->close(); ?> Example #2 Procedural style <?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s ", maxdb_connect_error()); exit(); } maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city"); $city = "'s Hertogenbosch"; /* this query will fail, cause we didn't escape $city */ if (!maxdb_query($link, "INSERT into temp.mycity VALUES ('11111','$city','NY')")) { printf("Error: %s ", maxdb_sqlstate($link)); } $city = maxdb_real_escape_string($link, $city); /* this query with escaped $city will work */ if (maxdb_query($link, "INSERT into temp.mycity VALUES ('22222','$city','NY')")) { printf("%d Row inserted. ", maxdb_affected_rows($link)); } maxdb_close($link); ?> The above example will output something similar to: Warning: maxdb_query(): -5016 POS(43) Missing delimiter: ) <...> Error: 42000 1 Row inserted. SEE ALSO
maxdb_character_set_name(3). PHP Documentation Group MAXDB_REAL_ESCAPE_STRING(3)
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