Cake Error Handling
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This Doc Page Contents Error Handling Error configuration Creating your own error handler Changing fatal error behavior zend framework error handling Error Handling¶ For 2.0 Object::cakeError() has been removed. Instead it has been replaced with a number of exceptions. All of the core classes that previously called cakeError are
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now throwing exceptions. This lets you either choose to handle the errors in your application code, or let the built-in exception handling deal with them. There is more control than ever for error and exception handling in CakePHP 2.0. You can configure which methods you want to set as the default error handler, and exception handler using configure. cakephp custom error page Error configuration¶ Error configuration is done inside your application's app/Config/core.php file. You can define a callback to be fired each time your application triggers any PHP error. Exceptions are handled separately. The callback can be any PHP callable, including an anonymous function. The default error handling configuration looks like: Configure::write('Error', array( 'handler' => 'ErrorHandler::handleError', 'level' => E_ALL & ~E_DEPRECATED, 'trace' => true )); You have 5 built-in options when configuring error handlers: handler - callback - The callback to handle errors. You can set this to any callable type, including anonymous functions. level - int - The level of errors you are interested in capturing. Use the built-in PHP error constants, and bitmasks to select the level of error you are interested in. trace - boolean - Include stack traces for errors in log files. Stack traces will be included in the log after each error. This is helpful for finding where/when errors are being raised. consoleHandler - callback - The callback used to handle errors when running
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Contents Error Handling Error Handling¶ In the event of an unrecoverable error in your application, it is common to stop processing and cakephp 3 exception handling show an error page to the user. To save you from having to code error handling for this in each of your controllers and components, you can use the provided method: $this->cakeError(string $errorType [, http://book.cakephp.org/2.0/en/development/errors.html array $parameters]); Calling this method will show an error page to the user and halt any further processing in your application. parameters must be an array of strings. If the array contains objects (including Exception objects), they will be cast into strings. CakePHP pre-defines a set of error-types, but at the time of writing, most are only really useful by the framework itself. One that is more useful to the application http://book.cakephp.org/1.2/en/The-Manual/Common-Tasks-With-CakePHP/Error-Handling.html developer is the good old 404 error. This can be called with no parameters as follows: $this->cakeError('error404'); Or alternatively, you can cause the page to report the error was at a specific URL by passing the url parameter: $this->cakeError('error404', array('url' => 'some/other.url')); This all starts being a lot more useful by extending the error handler to use your own error-types. Application error handlers are largely like controller actions; You typically will set() any passed parameters to be available to the view and then render a view file from your app/views/errors directory. Create a file app/app_error.php with the following definition. Handlers for new error-types can be implemented by adding methods to this class. Simply create a new method with the name you want to use as your error-type. Let's say we have an application that writes a number of files to disk and that it is appropriate to report write errors to the user. We don't want to add code for this all over the different parts of our application, so this is a great case for using a new error type. Add a new method to your AppError class. We'll take one parameter called file that will be the path to the file we failed to wri
act on the error. If you want the error to propagate as normal, you can http://cakebuild.net/docs/fundamentals/error-handling rethrow the exception. Task("A") .Does(() => { }) .OnError(exception => { // Handle the error here. }); Ignoring errors To automatically swallow errors that occur in a http://josediazgonzalez.com/2015/12/07/error-handling-in-cakephp-3/ task, you can use the ContinueOnError task extension. The ContinueOnError extension cannot be combined with OnError. Task("A") .ContinueOnError() .Does(() => { }); Reporting errors If you want error handling to report an error without affecting its propagation or resulting stack trace, you can use the ReportError task extension. Any exceptions thrown in the scope of ReportError will be swallowed. Task("A") .Does(() => { }) .ReportError(exception => { // Report the error. }); Aborting the build If something has gone wrong that you cake error handling cannot recover from, you should throw an exception to indicate it. The Cake script runner will then log the error (using the Error method) and return exit code 1 to indicate that something went wrong. Task("Check-ReleaseNotes") .Does(() => { var releaseNotes = ParseReleaseNotes("./ReleaseNotes.md"); if(releaseNotes.Version.ToString() != nugetVersion) { throw new Exception(String.Format("Release notes are missing an entry for v{0}. Latest release notes are for v{1}", nugetVersion, releaseNotes.Version)); } });
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