Call wp_load_translations_early in WP_Shutdown_Handler

[spacedmonkey]

It a PHP error handles extremely early in the bootstrap process, say in the wp-config.ph file, the WP_Shutdown_Handler will display an error message. This error message is run through the __ translation functions, but as the functions do not exist yet, these string fail to translated. Other parts of core, like wp-db class call the wp_load_translations_early function to fix this issue.

[spacedmonkey]

Related: #44458

[spacedmonkey]

Patch added.

[pento]

Adding to 5.1 milestone for consideration.

[ocean90]

Haven't looked in detail when this handler is called but if wp_load_translations_early() is available it should be used.

[flixos90]

In 44622:

Bootstrap/Load: Use wp_load_translations_early() when Translation API is not yet loaded.

Props spacedmonkey.
Fixes #45932. See #44458.

[flixos90]

In 44717:

Bootstrap/Load: Revert fatal error recovery mechanism from 5.1 to polish for 5.2.

Due to the high number of follow-up tickets and associated security concerns, it was decided to reschedule the fatal error recovery feature for WordPress 5.2, in order to address these issues properly. The feature will continue to be developed, with iterations being merged into trunk early in the 5.2 release cycle.

Fixes #46141. See #44458, #45932, #45940, #46038, #46047, #46068.

[flixos90]

This ticket is based on the old fatal error recovery mode implementation and will be covered as part of #46130.