Emoji: Allow emoji in `blogname` and `blogdescription` on `utf8` installs.

When the options table is set to `utf8` instead of `utf8mb4`, emoji will be stripped from the blog name and description when they're saved. Instead of stripping them, they can be encode as HTML entities.

Fixes #36122.


Built from https://develop.svn.wordpress.org/trunk@37469


git-svn-id: http://core.svn.wordpress.org/trunk@37437 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -3706,6 +3706,10 @@ function sanitize_option( $option, $value ) {
 		case 'blogdescription':
 		case 'blogname':
 			$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', $value );
+			if ( $value !== $original_value ) {
+				$value = $wpdb->strip_invalid_text_for_column( $wpdb->options, 'option_value', wp_encode_emoji( $original_value ) );
+			}
+
 			if ( is_wp_error( $value ) ) {
 				$error = $value->get_error_message();
 			} else {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-alpha-37468';
+$wp_version = '4.6-alpha-37469';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.