Solved

Error Handling

Posted on 2006-11-22
10
193 Views
Last Modified: 2008-03-06
In PHP5 if you return false out of the function referenced by set_error_handler the default PHP error handler takes over and handles everything. Is there a way to do this in PHP4? Or perhaps anyone has the default error handler code written in PHP?
0
Comment
Question by:thepadders
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
  • +1
10 Comments
 
LVL 11

Expert Comment

by:ch2
ID: 18001131
Take a read here.

5.0.0      The error_types parameter was introduced.
4.3.0      Instead of a function name, an array containing an object reference and a method name can also be supplied as the error_handler.
4.0.2      Three optional parameters for the error_handler user function was introduced. These are the filename, the line number, and the context.

http://en.php.net/set_error_handler


The above link contains also an example to handle errors with the set_error_handler.

Hope it helps.
0
 

Author Comment

by:thepadders
ID: 18001158
Yes, I understand all that but it dosen't really help answer my question unfortunatly.
0
 
LVL 11

Expert Comment

by:ch2
ID: 18001214
I don't understand your question. My bad english, sorry. Some one will answer.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 48

Expert Comment

by:hernst42
ID: 18001355
No if you use a error-handler in php4 the returnvalue of your function is not evaluated by php4 and thus you need to take care of it in your error-handler (e.g. print out the error-message)
0
 
LVL 13

Expert Comment

by:rhickmott
ID: 18002243
The whole point of set_error_handler is to offer a way for you to handle errors why would you set a return value?

As an Example :
=========================================================================================

function errMsg ($err_type, $err_msg, $err_file, $err_line) {

      $errortype = array (
                1   =>  "Error",
                2   =>  "Warning",
                4   =>  "Parsing Error",
                8   =>  "Notice",
                16  =>  "Core Error",
                32  =>  "Core Warning",
                64  =>  "Compile Error",
                128 =>  "Compile Warning",
                256 =>  "User Error",
                512 =>  "User Warning",
                1024=>  "User Notice",
                2048=>  "Strict Error"
        );

        if ($err_type <= error_reporting()) {

              // We Need to Handle this Error
              echo      ("      A $errortype[$err_type] has occured in <b>$err_file</b> at line <b>$err_line</b> <br />
                          $err_msg
                    ");
              
              // Log Error
            $error_text            =            "ERROR DATE TIME : ".date("d/m/Y g:m A")."\n";
            $error_text            .=            "ERROR TYPE WAS : $error_name\n";
            $error_text            .=            "ERROR OCCURED AT : $err_file - $err_line\n";
            $error_text            .=            "ERROR WAS : $err_msg\n\n";

            error_log($error_text,3,"c:/temp/errorlog.txt");
        }
}


set_error_handler("errMsg");      // Set Error Handler

=========================================================================================
0
 
LVL 48

Expert Comment

by:hernst42
ID: 18002409
You set an return value, so the default php-error-handler can be used (e.g. you only want to catch errors from cetrain files by your own) As php has some more options to handle errors (e.g. write to webserver-log) this can be a very usefull option.
0
 

Author Comment

by:thepadders
ID: 18005054
Yes, hernst42 understands the reason; I guess there is no easy work around to do this, will just have to wrap the whole thing in a check for PHP5.
0
 
LVL 48

Accepted Solution

by:
hernst42 earned 500 total points
ID: 18006594
We also use this method to cope and log certain application errors. before we moved completly to php we hat the following code which worked both with php4 and php5:

if (substr(phpversion(),0,1) < 5) {
    // emulate error-output in php4
    echo '<b> ' . $errortype[$errno] . "</b>: $errmsg in <b>$filename</b> on line <b>$linenum</b><br/>\n";
}

// If debugging is done also render the errors into the page (php5) thing
return false;
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Ajax and PHP 4 47
Unwanted output from my query 5 42
How do you retrieve results from a PDO Array using this format? 5 46
Convert php array to comma seperated list 19 35
Generating table dynamically is the most common issue faced by php developers.... So it seems there is a need of an article that explains the basic concept of generating tables dynamically. It just requires a basic knowledge of html and little maths…
Foreword (July, 2015) Since I first wrote this article, years ago, a great many more people have begun using the internet.  They are coming online from every part of the globe, learning, reading, shopping and spending money at an ever-increasing ra…
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question