wpdb::determine_charset() public WP 4.6.0
Determines the best charset and collation to use given a charset and collation.
For example, when able, utf8mb4 should be used instead of utf8.
{} Это метод класса: wpdb{}
Хуков нет.
Возвращает
Массив. The most appropriate character set and collation to use.
Использование
global $wpdb; $wpdb->determine_charset( $charset, $collate );
- $charset(строка) (обязательный)
- The character set to check.
- $collate(строка) (обязательный)
- The collation to check.
Список изменений
С версии 4.6.0 | Введена. |
Код wpdb::determine_charset() wpdb::determine charset WP 5.6.2
public function determine_charset( $charset, $collate ) {
if ( ( $this->use_mysqli && ! ( $this->dbh instanceof mysqli ) ) || empty( $this->dbh ) ) {
return compact( 'charset', 'collate' );
}
if ( 'utf8' === $charset && $this->has_cap( 'utf8mb4' ) ) {
$charset = 'utf8mb4';
}
if ( 'utf8mb4' === $charset && ! $this->has_cap( 'utf8mb4' ) ) {
$charset = 'utf8';
$collate = str_replace( 'utf8mb4_', 'utf8_', $collate );
}
if ( 'utf8mb4' === $charset ) {
// _general_ is outdated, so we can upgrade it to _unicode_, instead.
if ( ! $collate || 'utf8_general_ci' === $collate ) {
$collate = 'utf8mb4_unicode_ci';
} else {
$collate = str_replace( 'utf8_', 'utf8mb4_', $collate );
}
}
// _unicode_520_ is a better collation, we should use that when it's available.
if ( $this->has_cap( 'utf8mb4_520' ) && 'utf8mb4_unicode_ci' === $collate ) {
$collate = 'utf8mb4_unicode_520_ci';
}
return compact( 'charset', 'collate' );
}