CakePHP 3 transliterator_transliterate PHP关于全新安装的警告

Question

I have installed CakePHP 3.4.3 using Composer (their recommended way) and my system meets all of the requirements. Upon installation and basic configuration everything is ticked green.

I've used bin/bake to bake the files for 1 very simple table which only has 5 columns: id, name, url, created, modified

When I go to insert a new record it's giving the following error message:

Warning (2): transliterator_transliterate(): Could not create transliterator with ID "Any-Latin; Latin-ASCII; [\u0080-\u7fff] remove" (transliterator_create: unable to open ICU transliterator with id "Any-Latin; Latin-ASCII; [\u0080-\u7fff] remove": U_INVALID_ID) [CORE/src/Utility/Text.php, line 1070]

I've Googled this but can't find any information I can understand about transliterator_transliterate() (never heard of this either).

As the file this is originating from src/Utility/Text.php is part of the Cake core I feel it's unwise to delve into this or modify it.

Why is this error being shown, what does it mean, and how can I fix it?

If I switch the debug setting to false in config/app.php this hides the message, but I don't feel that's a valid solution as it's complaining about something.

As I say, my system meets all their requirements: PHP 7, centOS, Apache and hasn't had any other errors during installation.

Answer 1

The solution is to install/update the ICU library, which seems to be either missing or too old.

The requirement for the library was removed from the composer definition lately, and turned into a suggestion, as it caused a lot of trouble for many people with outdated setups. While removing requirements isn't ideal, the fact that only two methods in the core require it seems to have been the justification for it being moved to a suggestion.

The suggest description makes it rather clear when this library is needed:

The intl PHP library, to use Text::transliterate() or Text::slug()

However it doesn't make any statements regarding the required version, which is something that surely could be improved.