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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 |
|---|---|
| 84 | if ( $drop ) { |
| 85 | |
| 86 | $drop_tables = apply_filters( 'wpmu_drop_tables', $wpdb->tables( 'blog' ) ); |
| 87 | |
| 88 | foreach ( (array) $drop_tables as $table ) { |
| 89 | $wpdb->query( "DROP TABLE IF EXISTS `$table`" ); |
| 90 | } |
| 91 | |
| 92 | $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->blogs WHERE blog_id = %d", $blog_id ) ); |
| 93 | $dir = apply_filters( 'wpmu_delete_blog_upload_dir', WP_CONTENT_DIR . "/blogs.dir/{$blog_id}/files/", $blog_id ); |
| 94 | $dir = rtrim( $dir, DIRECTORY_SEPARATOR ); |
| 95 | $top_dir = $dir; |
| 96 | $stack = array($dir); |
| 97 | $index = 0; |
| 98 | |
| 99 | while ( $index < count( $stack ) ) { |
| 100 | # Get indexed directory from stack |
| 101 | $dir = $stack[$index]; |
| 102 | |