Error Handling In PHP (part 2) (
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The first part of this article demonstrated basic error
handling in PHP, explaining the various error types and illustrating the
process of building a custom error handler. But that's just the tip of
the iceberg - this concluding part goes a step further, showing you to
trigger your own errors, and log error messages to a file, database or
email address.In the first part of this article, I introduced you to PHP's error-handling
functions, demonstrating how they could be used to control the manner in which
errors are handled. I showed you how to use the error reporting functions to
filter out those error types you didn't want to see, and how to use a custom
error handler to catch PHP's notices and warnings. Finally, I wrapped things up
with a demonstration of how a custom error handler could be used to track errors
on a Web site, and write those errors to a log file for later
review.
There's a lot more you can do with PHP's error-handling API,
though; what you've seen so far is just the tip of the iceberg. In this
concluding section, I will demonstrate how you can piggyback your code on top of
PHP's core engine by triggering your own errors and writing custom handlers to
deal with them. I will also show you a simpler method of logging errors, and
will (as usual) put the theory to the test with a couple of real-world examples.
Much mayhem ahead...so don't go anywhere!
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