[FX.php List] Snippet: Displaying Error Code Messages

[Jonathan Schwartz]

I forgot to mention that I intend this to be a development tool only. Thanks


Jonathan


At 10:06 AM +0100 3/20/07, Gjermund Gusland Thorsen wrote:
>ALWAYS write those errorcodes with datetime, browser and remote IP to
>a FileMaker log-table, there is no need to inform web users on why
>this happened.
>
>ggt667
>
>On 3/20/07, Edward L. Ford <elford at cs.bu.edu> wrote:
>>Actually, to expand on this a little more, when I do use this in
>>applications, I define a constant at the top of a file that lets me quickly
>>go into the file and turn these error code messages on and off.  Example:
>>
>>
>>define('ERROR_MSGS_ON', false); // Turns on error code reports in this file
>>include_once('FX.php');
>>include_once('connection_data.php');
>>include_once('FMErrors.php');
>>
>>Later on, when the code is doing database work where an error can occur, I
>>might do something like:
>>
>>if(ERROR_MSGS_ON) {
>>  echo("FileMaker Insertion Error Code: " . $ErrorCode . ", " .
>>$errorsList[$ErrorCode] . "\n");
>>}
>>
>>where $ErrorCode is the error code given when the code logic to the database
>>fails, and the $errorsList variable is the array in the FMErrors file.
>>
>>I hope this helps some of the less experienced FX folks.
>>
>>--Ed
>>-----------------------------------
>>http://www.edwardford.net
>>
>>
>>On Mar 20, 2007, at 1:41 AM, Edward L. Ford wrote:
>>I once used a similar technique below in my solutions, but have since
>>discarded it.  It's great for debugging problems and you don't know what the
>>error code means, but if you use this in a production solution, you open
>>yourself up to a security hole if the error is made through a coding error
>>or a query error that isn't caught before it's sent to FileMaker, and
>>essentially provide an attacker with a starting point to try and see where
>>any weaknesses like in the code.  Thus, I occasionally use this when I get a
>>lot of errors and want a quick way to figure out the problem, but for
>>production solutions, I only display a generic error message.
>>
>>
>>Just my two cents,
>>--Ed
>>-----------------------------------
>>http://www.edwardford.net
>>
>>
>>
>>On Mar 19, 2007, at 10:36 AM, Jonathan Schwartz wrote:
>>
>>Hi Folks,
>>
>>Wanted to offer up a simple little snippet that I created today to help with
>>error reporting.  Experienced fx.php users may already be using this
>>technique....so this is for the beginners/intermediate fx.php users.
>>
>>Up to this time, I have been using the FMErrors.php file as a simple
>>reference tool to look up the meaning of error codes thrown by FMP/fx.php.
>>The file is buried deep in the FX folder. That gets tired after the 1,000th
>>time.  On my last iteration, I realized that the file is actually an array:
>>the error number is the key and the error phrase is the value.  Now that I
>>am past my array-phobia, the answer seems clear. By simply requesting the
>>value associated with the current error number (key), the error phrase can
>>easily be displayed, like this:
>>
>>include(FMErrors.php);
>><snip>
>>if($searchResult['errorCode'] != '0' && $searchResult['errorCode'] != '401')
>>{
>>$msg = 'Oops! Your search didn\'t return any results due to a problem:
>>Error#'.$searchResult['errorCode']. '
>>'.$errorsList[$searchResult['errorCode']];
>>}
>>...and then display the $msg where appropriate.
>>
>>
>>In this case, I have assumed that all errors other than  "0" (No error) and
>>"401" (No records found) are problems, and that the message should be
>>displayed.  Your mileage may vary.
>>
>>HTH,
>>
>>Jonathan
>>--
>>Jonathan Schwartz
>>Exit 445 Group
>>jonathan at exit445.com
>>http://www.exit445.com
>>415-381-1852
>>FileMaker 8 Certified Developer
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-- 
Jonathan Schwartz
Exit 445 Group
jonathan at exit445.com
http://www.exit445.com
415-381-1852
FileMaker 8 Certified Developer