Options, Meta APIs: Disable siteurl and home fields on All Settings screen when defined as constants.

This aims to bring consistency with the General Settings screen, where these fields are disabled (read-only) if the `WP_SITEURL` and `WP_HOME` constants are defined in `wp-config.php`.

Follow-up to [208], [5093], [5394].

Props dilipbheda, Presskopp, SergeyBiryukov.
Fixes #63341.

git-svn-id: https://develop.svn.wordpress.org/trunk@60237 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-admin/options.php

@@ -404,21 +404,32 @@
 		continue;
 	}
 
+	if ( 'home' === $option->option_name && defined( 'WP_HOME' ) ) {
+		$disabled = true;
+	}
+
+	if ( 'siteurl' === $option->option_name && defined( 'WP_SITEURL' ) ) {
+		$disabled = true;
+	}
+
+	$class = 'all-options';
+
 	if ( is_serialized( $option->option_value ) ) {
 		if ( is_serialized_string( $option->option_value ) ) {
 			// This is a serialized string, so we should display it.
 			$value               = maybe_unserialize( $option->option_value );
 			$options_to_update[] = $option->option_name;
-			$class               = 'all-options';
 		} else {
 			$value    = 'SERIALIZED DATA';
 			$disabled = true;
-			$class    = 'all-options disabled';
 		}
 	} else {
 		$value               = $option->option_value;
 		$options_to_update[] = $option->option_name;
-		$class               = 'all-options';
+	}
+
+	if ( $disabled ) {
+		$class .= ' disabled';
 	}
 
 	$name = esc_attr( $option->option_name );