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This changeset introduces a `WP_Fatal_Error_Handler` class that detects fatal errors and displays a more user-friendly message about the site experiencing technical difficulties. Websites that have custom requirements in that regard can implement their own fatal error handler by adding a `fatal-error-handler.php` drop-in that returns the handler instance to use, which must be based on a class that inherits `WP_Fatal_Error_Handler`. That handler will then be used in place of the default one. Alternatively, the fatal error handler feature can be completely disable through a constant `WP_DISABLE_FATAL_ERROR_HANDLER`. Websites that would like to modify specifically the error template displayed in the frontend can add a `php-error.php` drop-in that works similarly to the existing `db-error.php` drop-in. For more granular customization, the fatal error handler also includes new filters `wp_should_handle_php_error`, `wp_php_error_message` and `wp_php_error_args`. Props afragen, bradleyt, flixos90, ocean90, schlessera, SergeyBiryukov, spacedmonkey, timothyblynjacobs. See #46130, #44458. Built from https://develop.svn.wordpress.org/trunk@44962 git-svn-id: http://core.svn.wordpress.org/trunk@44793 1a063a9b-81f0-0310-95a4-ce76da25c4cd
55 lines
1.5 KiB
PHP
55 lines
1.5 KiB
PHP
<?php
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/**
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* Error Protection API: Functions
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*
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* @package WordPress
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* @since 5.2.0
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*/
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/**
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* Registers the shutdown handler for fatal errors.
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*
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* The handler will only be registered if {@see wp_is_fatal_error_handler_enabled()} returns true.
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*
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* @since 5.2.0
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*/
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function wp_register_fatal_error_handler() {
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if ( ! wp_is_fatal_error_handler_enabled() ) {
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return;
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}
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$handler = null;
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if ( defined( 'WP_CONTENT_DIR' ) && is_readable( WP_CONTENT_DIR . '/fatal-error-handler.php' ) ) {
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$handler = include WP_CONTENT_DIR . '/fatal-error-handler.php';
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}
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if ( ! is_object( $handler ) || ! is_callable( array( $handler, 'handle' ) ) ) {
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$handler = new WP_Fatal_Error_Handler();
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}
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register_shutdown_function( array( $handler, 'handle' ) );
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}
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/**
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* Checks whether the fatal error handler is enabled.
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*
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* A constant `WP_DISABLE_FATAL_ERROR_HANDLER` can be set in `wp-config.php` to disable it, or alternatively the
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* {@see 'wp_fatal_error_handler_enabled'} filter can be used to modify the return value.
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*
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* @since 5.2.0
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*
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* @return bool True if the fatal error handler is enabled, false otherwise.
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*/
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function wp_is_fatal_error_handler_enabled() {
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$enabled = ! defined( 'WP_DISABLE_FATAL_ERROR_HANDLER' ) || ! WP_DISABLE_FATAL_ERROR_HANDLER;
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/**
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* Filters whether the fatal error handler is enabled.
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*
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* @since 5.2.0
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*
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* @param bool $enabled True if the fatal error handler is enabled, false otherwise.
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*/
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return apply_filters( 'wp_fatal_error_handler_enabled', $enabled );
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}
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