Above: Source code display with variable tool tips.
PHPMachine Error Handler
Above: Source code display with variable tool tips. |
This code snippet can be used to trap errors in your PHP scripts. The main function
is GetErrorDescription, it takes
five arguments, the error type,
the error message, the file
the error occurred in, the line number
where the error occurred, and an array containing the variables
initialized and available at the time of the error. Each of these parameters
is provided by PHP whenever an error occurs. The function returns HTML content
that can be displayed on the page, saved to a file, e-mailed to the webmaster,
or anything else that you can think of!
The output will be split into three sections; an error overview, a section of source code from around the area where the error occurred (you may hover your mouse over a variable to see it's contents) and a collapsible tree view of all initialized variables. Note: the JavaScript used to generate the variable tree is only compatible with Microsoft Internet Explorer.
 Above: Collapsible tree view of all variables. |
A very simple example of how to use the code is shown below.
| include_once("phpmachine-error-handler.php"); function customerror($type, $msg, $file, $line, $context){ @ob_end_clean(); // get rid of any half-parsed page echo GetErrorDescription($type, $msg, $file, $line, $context); die(); } // define custom error handler set_error_handler("customerror"); ob_start(); // ... // code that may cause an error goes here.. // ... trigger_error("This is a test error"); // ... // more code... // ... ob_end_flush(); |
This example will display an error report in the browser window whenever any type of error occurs. Obviously this would only be recommended during development - you don't want your users seeing your source code!
Download:
phpmachine-error-handler.php (6KB)
If you have any
comments/suggestions please send a mail to info@phpmachine.com.
Oh, and while were on the subject of errors... if you need help fixing a broken
PHP script or you need a PHP script modified, or even developed
from scratch visit PHPMachine for a
free no-obligations quotation. We guarantee that our price will be the cheapest
that you find.