Php Error Handler Fatal Errors
Contents |
a custom error handlerImplementing a custom error handler using set_error_handler() in PHP can be php register_shutdown_function a useful technique (Google search for more info/examples)Unfortunately, php catch fatal error and continue set_error_handler() doesn’t catch fatal errors — as the PHP docs say:The following error types
Php Set_error_handler
cannot be handled with a user defined function: E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR, E_COMPILE_WARNING, and most of E_STRICT raised
Php Set_exception_handler
in the file where set_error_handler() is called.Handily, I just discovered it’s possible to catch fatal E_ERROR errors and direct them to your custom error handler using a combination of register_shutdown_function() and error_get_last():set_error_handler('myErrorHandler');register_shutdown_function('fatalErrorShutdownHandler');function myErrorHandler($code, $message, $file, $line) { ...}function fatalErrorShutdownHandler(){ $last_error register_shutdown_function fatal error = error_get_last(); if ($last_error['type'] === E_ERROR) { // fatal error myErrorHandler(E_ERROR, $last_error['message'], $last_error['file'], $last_error['line']); }}The key is that functions registered with register_shutdown_function() are called even on a fatal error - including out of memory errors. error_get_last() can then be used to detect whether we’re ending the script because of a fatal error, and pass the error info to your custom error handler if so.UncategorizedDevPHPBlockedUnblockFollowFollowingAndy YoungStartups. Code. Product, Growth & Metrics. EIR @500startups. Previously UK @Stripe, founder @GroupSpaces.FollowAndy’s BlogEntrepreneur, engineer, music addict. Consulting on growth, product & analytics, and Distro team @ 500 Startups. Previously launched Stripe in the UK, founder of GroupSpaces, creator of Selective Tweets (#fb). Love/live in London.×Don’t miss Andy Young’s next storyBlockedUnblockFollowFollowingAndy Young
and Objects Namespaces Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as
Php Error_get_last
an Apache module Session Security Filesystem Security Database Security Error Reporting Using Register fatal error in php means Globals User Submitted Data Magic Quotes Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with what is fatal error in php XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Safe Mode Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication https://insomanic.me.uk/php-trick-catching-fatal-errors-e-error-with-a-custom-error-handler-cea2262697a2 Services Command Line Specific Extensions Compression and Archive Extensions Credit Card Processing Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and http://php.net/manual/en/function.set-error-handler.php Type Related Extensions Web Services Windows Only Extensions XML Manipulation Keyboard Shortcuts? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search(current page) / Focus search box set_exception_handler » « restore_exception_handler PHP Manual Function Reference Affecting PHP's Behaviour Error Handling Error Handling Functions Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report a Bug set_error_handler (PHP 4 >= 4.0.1, PHP 5, PHP 7)set_error_handler — Sets a user-defined error handler function Description mixed set_error_handler ( callable $error_handler [, int $error_types = E_ALL | E_STRICT ] ) Sets a user function (error_handler) to handle errors in a script. This function can be used for defining your own way of handling errors during runtime, for example in applications in which you need to do cleanup of data/files when a critical error happens, or when you need to trigger an error under certain conditions (using trigger_error()). It is important to remember that the standard PHP e
of errors. For example, if you try to call a non-existing function from your script, PHP will probably render a http://markonphp.com/handling-fatal-errors-php white page on your production server… if your settings are like the one I defined in my article about error display. Using register_shutdown_function() For Fatal Errors The solution to http://blog.elijaa.org/2010/04/20/handling-fatal-error-in-php-with-register_shutdown_function/ this isn’t the cleanest I found, but it works. We’ll use the method register_shutdown_function(). Keep in mind that this method will be called after the end of each fatal error one of your scripts! So, don’t do any super costly operations in this custom handler, or all of your scripts will be slow. Add this piece of code to the previous script we made in the post : register_shutdown_function('fatalErrorHandler'); function fatalErrorHandler() { $last_error = error_get_last(); if ($last_error['type'] === E_ERROR) { errorHandler(E_ERROR, $last_error['message'], $last_error['file'], $last_error['line']); } } The 1st line is the line registering our custom 'shutdown function'. You can register as many function as you want with this function. For this example, we only need to register one handler that will check for fatal errors. The 4th line inside our custom shutdown handler is a piece of code that will get the last error that happened (if there was an error). The 5th line will check that the error is a fatal error. We don't want this handler to handle other types of errors because we already do this with our custom error_handler. The 6th line is where we call our custom error handler we made in the previous post, so that the same logic is reused. Conclusion That’s it! If you want to test that everything works
PHP with register_shutdown_function PHP 5.2.0 bring us a new function : error_get_last() It return an associative array describing the last error with keys "type", "message", "file" and "line" about the last error that occurred. We can now use it with register_shutdown_function to handle fatal error, log, redirect, html page, instead of the infamous white page. 1234567891011121314151617181920 /** * Handling fatal error * * @return void */function fatalErrorHandler(){# Getting last error$error = error_get_last();# Checking if last error is a fatal errorif(($error['type'] === E_ERROR) || ($error['type'] === E_USER_ERROR)){# Here we handle the error, displaying HTML, logging, ...echo 'Sorry, a serious error has occured in ' . $error['file'];}}# Registering shutdown functionregister_shutdown_function('fatalErrorHandler'); Resources : http://www.php.net/manual/en/function.error-get-last.php http://php.net/manual/en/errorfunc.constants.php FacebookTwitter Related posts: Handle configuration in PHP with var_export() Solve Wrong permissions on configuration file, should not be world writable! error on phpMyAdmin Write file manipulation cross-platform PHP code How to regularly check for a newer version in a PHP application Solve PHP Warning : session_start() [function.session-start]: Node no longer exists 2 Responses Comments2 Pingbacks0 Suraj Kumar Adhikari says: March 5, 2014 at 2:07 AM Awesome information!!! thanks Reply James says: May 31, 2016 at 2:53 PM Good tip, thanks! Reply Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Search PHP Detect WebP, JP2 / JPEG 2000 and JXR / JPEG XR browser support in PHP PHP Access Windows Files from Linux Server via smbclient & PHP PHP PHP API Client Library and Google Cloud Storage PHP Solve PHP Warning : session_start() [function.session-start]: Node no longer exists Eli © 2016. All Rights Reserved.