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Gary Pendergast 7fc579eec9 Database: Don't force an unsupported character set that previously would've silently failed.
[37320] corrected some behaviour in how PHP and MySQL character sets are matched up. This was correct, but had the side effect of causing some incorrectly configured sites to start failing.

Prior to [37320], if `DB_CHARSET` was set to `utf8mb4`, but the PHP version didn't support `utf8mb4`, it would fall back to the default character set - usually `latin1`. After [37320], the `SET NAMES` query would force MySQL to treat the connection character set as `utf8mb4`, even if PHP wasn't able to understand it.

By checking if `mysqli_set_charset()` succeeded, we can simulate the old behaviour, while maintaining the fix in [37320].

Props danielkanchev fo helping to diagnose this issue.
Fixes #37689 for trunk.



git-svn-id: https://develop.svn.wordpress.org/trunk@38441 602fd350-edb4-49c9-b593-d223f7449a82
2016-08-30 07:37:59 +00:00
src Database: Don't force an unsupported character set that previously would've silently failed. 2016-08-30 07:37:59 +00:00
tests Remove unnecessary uniqueness check in get_attachment_taxonomies(). 2016-08-30 03:06:06 +00:00
tools/i18n DOCS: Replace HTTP links with HTTPS. 2016-06-10 04:49:09 +00:00
.editorconfig Use HTTPS URLs for codex.wordpress.org. 2015-04-12 21:28:58 +00:00
.gitignore After [38399], update the .gitignore file accordingly. 2016-08-27 11:28:11 +00:00
.jshintrc Build: Prevent non-breaking spaces from accidentally being inserted into JavaScript files. 2015-11-12 12:04:55 +00:00
.travis.yml Build/Test Tools: Ensure PHP 7.1 is tested on Travis. 2016-08-17 20:45:07 +00:00
Gruntfile.js Fix jshint of Gruntfile.js 2016-08-18 20:04:16 +00:00
package.json Trunk is now 4.7-alpha. 2016-08-02 13:44:37 +00:00
phpunit.xml.dist Set a whitelist for PHPUnit code coverage. 2016-05-17 20:22:57 +00:00
wp-cli.yml Remove debug mode from WP-CLI by default, as it now outputs too much debugging information to be of use during normal development. 2015-11-28 18:36:06 +00:00
wp-config-sample.php Lightly clean up and improve inline documentation in wp-config-sample.php. 2015-05-10 00:05:30 +00:00
wp-tests-config-sample.php Unit Tests: Correct comment in wp-tests-config-sample.php. 2016-01-21 20:24:12 +00:00