Correct references of @uses $wpdb in core documentation to use @global.

See #30191, [30105].
Fixes #30217.


git-svn-id: https://develop.svn.wordpress.org/trunk@30122 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/export.php

@@ -112,7 +112,7 @@ require_once( ABSPATH . 'wp-admin/admin-header.php' );
 /**
  * Create the date options fields for exporting a given post type.
  *
- * @global wpdb      $wpdb      WordPress database object.
+ * @global wpdb      $wpdb      WordPress database abstraction object.
  * @global WP_Locale $wp_locale Date and Time Locale object.
  *
  * @since 3.1.0

src/wp-admin/includes/comment.php

@@ -10,7 +10,8 @@
  * Determine if a comment exists based on author and date.
  *
  * @since 2.0.0
- * @uses $wpdb
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $comment_author Author of the comment
  * @param string $comment_date Date of the comment
@@ -110,7 +111,8 @@ function get_comment_to_edit( $id ) {
  * Get the number of pending comments on a post or posts
  *
  * @since 2.3.0
- * @uses $wpdb
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param int|array $post_id Either a single Post ID or an array of Post IDs
  * @return int|array Either a single Posts pending comments as an int or an array of ints keyed on the Post IDs

src/wp-admin/includes/schema.php

@@ -324,7 +324,8 @@ $wp_queries = wp_get_db_schema( 'all' );
  * Create WordPress options and set the default values.
  *
  * @since 1.5.0
- * @uses $wpdb
+ *
+ * @global wpdb $wpdb WordPress database abstraction object.
  * @uses $wp_db_version
  */
 function populate_options() {

src/wp-admin/install-helper.php

@@ -44,7 +44,7 @@ if ( ! function_exists('maybe_create_table') ) :
  *
  * @since 1.0.0
  *
- * @uses $wpdb
+ * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $table_name Database table name.
  * @param string $create_ddl Create database table SQL.
@@ -76,7 +76,7 @@ if ( ! function_exists('maybe_add_column') ) :
  *
  * @since 1.0.0
  *
- * @uses $wpdb
+ * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $table_name Database table name
  * @param string $column_name Table column name
@@ -110,7 +110,7 @@ endif;
  *
  * @since 1.0.0
  *
- * @uses $wpdb
+ * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $table_name Table name
  * @param string $column_name Column name