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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 |
|---|---|
| 115 | $tables = $wpdb->tables( 'blog' ); |
| 116 | /** |
| 117 | * Filters the tables to drop when the site is deleted. |
| 118 | * |
| 119 | * @since MU |
| 120 | * |
| 121 | * @param array $tables The site tables to be dropped. |
| 122 | * @param int $blog_id The ID of the site to drop tables for. |
| 123 | */ |
| 124 | $drop_tables = apply_filters( 'wpmu_drop_tables', $tables, $blog_id ); |
| 125 | |
| 126 | foreach ( (array) $drop_tables as $table ) { |
| 127 | $wpdb->query( "DROP TABLE IF EXISTS `$table`" ); |
| 128 | } |
| 129 | |
| 130 | $wpdb->delete( $wpdb->blogs, array( 'blog_id' => $blog_id ) ); |
| 131 | |
| 132 | /** |
| 133 | * Filters the upload base directory to delete when the site is deleted. |