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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 92 | $tables = $wpdb->tables( 'blog' ); |
| 93 | /** |
| 94 | * Filter the tables to drop when the blog is deleted. |
| 95 | * |
| 96 | * @since MU |
| 97 | * |
| 98 | * @param array $tables The blog tables to be dropped. |
| 99 | * @param int $blog_id The ID of the blog to drop tables for. |
| 100 | */ |
| 101 | $drop_tables = apply_filters( 'wpmu_drop_tables', $tables, $blog_id ); |
| 102 | |
| 103 | foreach ( (array) $drop_tables as $table ) { |
| 104 | $wpdb->query( "DROP TABLE IF EXISTS `$table`" ); |
| 105 | } |
| 106 | |
| 107 | $wpdb->delete( $wpdb->blogs, array( 'blog_id' => $blog_id ) ); |
| 108 | |
| 109 | $uploads = wp_upload_dir(); |
| 110 | /** |