Set internal encoding.

In most cases the default internal encoding is latin1, which is of no use, since we want to use the mb_ functions for utf-8 strings.

File: wp-includes/load.php. View all references

function wp_set_internal_encoding() {
	if ( function_exists( 'mb_internal_encoding' ) ) {
		$charset = get_option( 'blog_charset' );
		// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
		if ( ! $charset || ! @mb_internal_encoding( $charset ) ) {
			mb_internal_encoding( 'UTF-8' );
		}
	}
}