Handle exception without using try catch in Zend Framework 1

Question

I have a project which is developed in Zend Framework 1. The project is completed.

Now while I am testing the whole site, some pages thrown exceptions. One of such is below:

exception 'Zend_Paginator_Exception' with message 'No adapter for type NULL'

I have searched in net and got the steps to add try-catch to this. But it will take much time to check all code and repeat this step.

Can I write a common exception handler which catches all exceptions and handle it ?

Answer 1

Zend framework automatically handles exceptions using the errorController. You can enable it by adding the following line in you config file.

resources.frontController.throwExceptions = 0

If you want to handle exceptions manually then, rather then writing try/catch block all over the code you can centralize it using the code below.

Tell Zend Framework to not handle exceptions. Do this in your application.ini

resources.frontController.throwExceptions = 1

Define a custom method to handle exceptions in your Bootstrap class.

public function __handleExceptions(Exception $e){
        //render a view with a simple error message for the user
        //and send an email with the error to admin
    }

Override the _bootstrap() and run() methods of Zend_Application_Bootstrap_Bootstrap in your Bootstrap class as shown below. This will catch all the exceptions thrown during the bootstrapping and request dispatching process and call your custom exception handler.

protected function _bootstrap($resource = null)
    {
        try {
            parent::_bootstrap($resource);
        } catch(Exception $e) {
            $this->__handleExecptions($e);
        }
    }

    public function run()
    {
        try {
            parent::run();
        } catch(Exception $e) {
            $this->__handleExecptions($e);
        }
    }

This will eliminate the need of writing try/catch block at multiple places. Hope this helps.

Answer 2

If you have this line in your index.php

$application->bootstrap()->run();

You can wrap it with try catch block

try {
    $application->bootstrap()->run();
} catch (Exception $e) {
    //handle all exceptions here
}

Of course you can also have many catch blocks for different types of exceptions.