[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
There were some cases where some local variables in `wpdb::init_charset()` could be undefined when they were used.
Props Frozzare.
Fixes#37683 for trunk.
git-svn-id: https://develop.svn.wordpress.org/trunk@38439 602fd350-edb4-49c9-b593-d223f7449a82
Replaces unsecure links in documentation and translator comments with their secure versions.
Props johnpgreen, netweb
Fixes#36993
git-svn-id: https://develop.svn.wordpress.org/trunk@37674 602fd350-edb4-49c9-b593-d223f7449a82
The logic for determining the appropriate character set and collation to use is becoming more complex, particularly with the recent additions of [37522] and [37523]. As `init_charset()` has side effects, and makes use of constants instead of parameters, it's not possible to unit test this logic.
This commit splits the logic part of `init_charset()` out into a new method, `wpdb::determine_charset()`, along with appropriate unit tests.
See #32105, #37522.
Fixes#36917.
git-svn-id: https://develop.svn.wordpress.org/trunk@37601 602fd350-edb4-49c9-b593-d223f7449a82
In the event that the database has gone away for some reason, calls to `mysqli_errno()` and `mysqli_error()` (and their `ext/mysql` equivalents, of course), will generate PHP warnings, which are unsightly, and not how we do things in these parts.
Props mbijon, craig-ralston for the original patch.
Fixes#23085.
git-svn-id: https://develop.svn.wordpress.org/trunk@37548 602fd350-edb4-49c9-b593-d223f7449a82
Applying these specially-crafted `@see` tags allows the Code Reference parser to recognize and link these elements as actions and filters.
Fixes#36921.
git-svn-id: https://develop.svn.wordpress.org/trunk@37544 602fd350-edb4-49c9-b593-d223f7449a82
The `utf8mb4_unicode_520_ci` (Unicode Collation Algorithm 5.2.0, October 2010) collation is an improvement over `utf8mb4_unicode_ci` (UCA 4.0.0, November 2003).
There is no word on when MySQL will support later UCAs.
Fixes#32105.
git-svn-id: https://develop.svn.wordpress.org/trunk@37523 602fd350-edb4-49c9-b593-d223f7449a82
Some sites prefer to use locale-specific location settings. For example, the Swedish WordPress package use `utf8_swedish_ci`, instead of `utf8_unicode_ci`. When upgrading the connection to `utf8mb4`, we were overriding this to be `utf8mb4_unicode_ci`, instead of maintaining the use of the `_swedish_ci` variant.
The locale-specific collations do have extra collation rules just for that language, so it's useful to maintain compatibility.
Fixes#32405.
git-svn-id: https://develop.svn.wordpress.org/trunk@37521 602fd350-edb4-49c9-b593-d223f7449a82
Also use 'back-compat' in some inline comments where backward compatibility is the subject and shorthand feels more natural.
Note: 'backwards compatibility/compatibile' can also be considered correct, though it's primary seen in regular use in British English.
Props ocean90.
Fixes#36835.
git-svn-id: https://develop.svn.wordpress.org/trunk@37431 602fd350-edb4-49c9-b593-d223f7449a82
This is a partial revert of [35860], which has been causing un-catchable warnings to be generated on some server configurations.
Fixes#36629 for trunk.
See #21870.
git-svn-id: https://develop.svn.wordpress.org/trunk@37292 602fd350-edb4-49c9-b593-d223f7449a82
In the event that it was closed prematurely, `wpdb::query()` will re-open the connection automatically.
Fixes#34903.
git-svn-id: https://develop.svn.wordpress.org/trunk@36433 602fd350-edb4-49c9-b593-d223f7449a82
If `DB_CHARSET` isn't defined (or is empty), `wpdb::$charset` will be empty, too. `wpdb::strip_invalid_text()` assumes that it isn't empty, however, so we need to fall back to the connection character set when we're running our sanity checks.
Fixes#34708.
git-svn-id: https://develop.svn.wordpress.org/trunk@35655 602fd350-edb4-49c9-b593-d223f7449a82
Specifically, `::insert()`, `::replace()`, `::update()`, and `::delete()` can now set a column to `NULL`, or add the `IS NULL` condition to the `WHERE` clause.
This is based on [backpress 279].
Props pento, nbachiyski, sorich87.
Fixes#15158.
git-svn-id: https://develop.svn.wordpress.org/trunk@34737 602fd350-edb4-49c9-b593-d223f7449a82
Previously, we'd run the sanity checks if `is_mysql` was not set to `false`. This caused problems for DB drop-ins that didn't define `is_mysql` at all. Instead, we can just check if `is_mysql` is `empty()`.
Also fix some unit tests that accidently ran correctly because of the strict `false ===` comparison.
Fixes#33501.
git-svn-id: https://develop.svn.wordpress.org/trunk@34655 602fd350-edb4-49c9-b593-d223f7449a82
Adds a new table to the database schema (`wp_termmeta`), and a set of
`*_term_meta()` API functions. `get_terms()` and `wp_get_object_terms()`
now also support 'meta_query' parameters, with syntax identical to other
uses of `WP_Meta_Query`.
When fetching terms via `get_terms()` or `wp_get_object_terms()`, metadata for
matched terms is preloaded into the cache by default. Disable this behavior
by setting the new `$update_term_meta_cache` paramater to `false`.
To maximize performance, within `WP_Query` loops, the termmeta cache is *not*
primed by default. Instead, we use a lazy-loading technique: metadata for all
terms belonging to posts in the loop is loaded into the cache the first time
that `get_term_meta()` is called within the loop.
Props boonebgorges, sirzooro.
See #10142.
git-svn-id: https://develop.svn.wordpress.org/trunk@34529 602fd350-edb4-49c9-b593-d223f7449a82
While it doesn't affect Core, we should also be passing the `$allow_bail` parameter, for anything that uses it differently.
Props markoheijnen, johnbillion.
Fixes#33105.
git-svn-id: https://develop.svn.wordpress.org/trunk@34478 602fd350-edb4-49c9-b593-d223f7449a82
This change does the following things
* Allows utf8mb4 for the MySQL extension
* Re-runs the utf8->utf8mb4 conversion for single sites, this will do nothing for tables already converted
* Re-runs the utf8->utf8mb4 conversion for global tables in multisite when the environment supports utf8mb4
* Removes upgrade_420() calling as upgrade_430() will perform those changes now instead
The index shortenings should have still taken place on utf8 sites previously, so there's no need to run those again.
Props kovshenin, pento, dd32
Fixes#32127 for trunk.
git-svn-id: https://develop.svn.wordpress.org/trunk@33055 602fd350-edb4-49c9-b593-d223f7449a82
