Finally this is working as required!! I ended up changing the column type
that stores the time to an INT and inserting a UNIX TIMESTAMP into it, below
is the code that works fine, it may be useful to somebody else as a flood
control, I hope it is fairly self-explanatory....

    /***Variable to insert UNIX_TIMESTAMP into DB first time round***
    ****column for time is INT UNSIGNED NOT NULL*********************/
    $pw_time = time ();

     //users current IP
    $pw_userIP = getenv("REMOTE_ADDR");

    $sql = "SELECT (UNIX_TIMESTAMP() - log_time) AS timediff FROM clinic_log
WHERE user_ip = '$pw_userIP' ";
    $sql_result = mysql_query($sql,$connection) or die("Couldn't execute

    if (mysql_num_rows($sql_result)!=0)
         while($row = mysql_fetch_array($sql_result))
          if($row[timediff]<360) //**number of seconds to block resubmission
            die("<b>ERROR:</b> Your question has already been submitted.");
    }   }   }


What a frustrating experience it was to get this sorted out, still I have
learnt a lot in the process, which is what it's all about I guess!

Thanks again

----- Original Message -----
From: "p.whiter" <[EMAIL PROTECTED]>
Subject: Re: [PHP-DB] newbie - problems with Select and timestamp(14)

: Thanks to everyone for your help!!
: I have plenty to try here, I'll let you know how I get on with it....
: Regards
: Paul

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