Global Exception Handling
When developing PHP applications, unhandled exceptions can cause your scripts to terminate abruptly, potentially exposing sensitive information or causing a poor user experience. To address this, PHP provides the set_exception_handler function, which allows you to register a global exception handler. This handler is invoked whenever an uncaught exception occurs anywhere in your code. By using a global exception handler, you can ensure that all exceptions are managed in a consistent manner, such as logging error details and displaying a user-friendly message, rather than letting the application crash or leak internal information.
global_exception_handler.php
123456789101112<?php // Register a global exception handler set_exception_handler(function ($exception) { // Log the exception details (in a real app, write to a file or error monitoring system) error_log("Uncaught exception: " . $exception->getMessage()); // Display a generic error message to the user echo "An unexpected error occurred. Please try again later."; }); // Throw an exception that is not caught locally throw new Exception("Something went wrong!");
In the code above, the global exception handler is registered using set_exception_handler. This function takes a callback that receives any uncaught exception as its argument. Inside the handler, the exception details are logged using error_log, which helps you track and debug issues without exposing sensitive information to the end user. The handler then displays a simple, generic error message, maintaining a secure and professional user experience. By implementing this global exception handler, you ensure that any exception not explicitly caught elsewhere in your code will still be handled gracefully, preventing application crashes and improving overall stability.
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When developing PHP applications, unhandled exceptions can cause your scripts to terminate abruptly, potentially exposing sensitive information or causing a poor user experience. To address this, PHP provides the set_exception_handler function, which allows you to register a global exception handler. This handler is invoked whenever an uncaught exception occurs anywhere in your code. By using a global exception handler, you can ensure that all exceptions are managed in a consistent manner, such as logging error details and displaying a user-friendly message, rather than letting the application crash or leak internal information.
global_exception_handler.php
123456789101112<?php // Register a global exception handler set_exception_handler(function ($exception) { // Log the exception details (in a real app, write to a file or error monitoring system) error_log("Uncaught exception: " . $exception->getMessage()); // Display a generic error message to the user echo "An unexpected error occurred. Please try again later."; }); // Throw an exception that is not caught locally throw new Exception("Something went wrong!");
In the code above, the global exception handler is registered using set_exception_handler. This function takes a callback that receives any uncaught exception as its argument. Inside the handler, the exception details are logged using error_log, which helps you track and debug issues without exposing sensitive information to the end user. The handler then displays a simple, generic error message, maintaining a secure and professional user experience. By implementing this global exception handler, you ensure that any exception not explicitly caught elsewhere in your code will still be handled gracefully, preventing application crashes and improving overall stability.
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