Creating a error handler class in php

Question

I recently have been asking question on exceptions and handling exceptions and such, which as recently best explained to me in this question. My question now is how would I use the

set_exception_handler();

in a class to set up a error handling class in php, that when ever an error is thrown is handled by this class. As the definition states:

Sets the default exception handler if an exception is not caught within a try/catch block. Execution will stop after the exception_handler is called.

I was thinking I could do something like:

class Test{
    public function __construct(){
        set_exception_handler('exception');
    }

    public function exception($exception){
        echo $exception->getMessage();
    }
}

But then the problem is that if the user is setting up the application or using any API from the application they have to do a whole: new Test();

So how could I write an exception handler class that is:

Automatically called when an exception is thrown to deal with the "uncaught" exception.
Done in an OOP way that is extendible.

The way I have shown is the only way I can think to do it.

This really should be in official PHP help, marked as the best practices! — Yevgeniy Afanasyev
– Yevgeniy Afanasyev, Commented Sep 11, 2018 at 6:09

Leo supports Monica Cellio · Accepted Answer · 2013-02-19 05:18:36Z

9

For your class to work, the line inside your contructor should be:

// if you want a normal method        
set_exception_handler(array($this, 'exception'));

// if you want a static method (add "static" to your handler method
set_exception_handler(array('Test', 'exception'));

answered Feb 19, 2013 at 5:18

Leo supports Monica Cellio

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3 Comments

Umbrella Over a year ago

It's worth mentioning, in general, when you want to pass a function name to something and the function is actually an object method, you use the syntax shown here. That is to say, this solution works for other PHP methods expecting a function name.

TheWebs Over a year ago

I saw my error a head of time, my concern is that if the user is setting up the application this is yet another class they have to call as a "new" object.

HosSeinM Over a year ago

I know this is for long time ago but it is better to use static::class instead of just the name of the class for the static methods. By using that you can support namespacing. set_exception_handler(array(static::class, 'exception'));

Vineet1982 · Accepted Answer · 2013-02-19 05:37:16Z

9

Everybody thinks that using set_exception_handler would catch all the error in the PHP but it is not true as some errors are not handled by the set_exception_handler the proper way to handle all types of errors have to be done as:

 //Setting for the PHP Error Handler
 set_error_handler( call_back function or class );

 //Setting for the PHP Exceptions Error Handler
 set_exception_handler(call_back function or class);

 //Setting for the PHP Fatal Error
 register_shutdown_function(call_back function or class);

By setting these three setting you can catch all the errors of PHP.

answered Feb 19, 2013 at 5:37

Vineet1982

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