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https://stackoverflow.com/questions/571694/what-factors-make-php-unicode-incompatible
I am able use UTF-8 characters just fine in my scripts. As a matter of fact it is possible to have names of variables and functions contain Unicode characters.. There is also the mb_string extension which deals with multi-byte strings, yet in countless articles PHP is criticized for its lack of Unicode support.. I don't get it; why is PHP said to not support Unicode?
https://docs.moodle.org/en/MySQL_full_unicode_support
In Moodle 3.3, 3.4 and 3.5 a warning will show that the database isn't using full UTF-8 support and suggest moving to 'utf8mb4_unicode_ci', but you may choose to keep using 'utf8_*'. File format To allow for large indexes on columns that are a varchar, a combination of settings needs to be set.
https://www.php.net/manual/en/regexp.reference.unicode.php
The \X escape matches a Unicode extended grapheme cluster. An extended grapheme cluster is one or more Unicode characters that combine to form a single glyph. In effect, this can be thought of as the Unicode equivalent of . as it will match one composed character, regardless of how many individual characters are actually used to render it.
https://dev.mysql.com/doc/refman/5.7/en/charset-unicode.html
Unicode support for supplementary characters requires character sets that have a range outside BMP characters and therefore take more space than BMP characters (up to 4 bytes per character). The UTF-8 (Unicode Transformation Format with 8-bit units) method for encoding Unicode data is implemented according to RFC 3629, which describes encoding ...
https://moodle.org/mod/forum/discuss.php?d=351689
May 02, 2017 · If you've previously attempted to install this you may have a config.php in your Moodle source code folder with the utf8mb4 setting. Check this file for the line: 'dbcollation' => 'utf8mb4_unicode_ci', and if this is present try changing this to: 'dbcollation' => 'utf8_unicode_ci',
https://en.wikipedia.org/wiki/PHP
PHP 6 and Unicode. PHP received mixed reviews due to lacking native Unicode support at the core language level. In 2005, a project headed by Andrei Zmievski was initiated to bring native Unicode support throughout PHP, by embedding the International Components for Unicode (ICU) library, and representing text strings as UTF-16 internally.Designed by: Rasmus Lerdorf
https://riptutorial.com/php/topic/4472/unicode-support-in-php
Unicode Support in PHP Related Examples. Converting Unicode characters to “\uxxxx” format using PHP ; Converting Unicode characters to their numeric value and/or HTML entities using PHP
https://moodle.org/mod/forum/discuss.php?d=359121
Sep 27, 2017 · The php you want to run is: $ php admin/cli/mysql_collation.php --collation=utf8mb4_unicode_ci However, there may or may not be other settings you need to adjust per the documentation link above, in addition to adding a small line to your config file.
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