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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 |
|---|---|
| 171 | * @since 1.5.0 |
| 172 | * @uses $wpdb |
| 173 | * @uses $wp_db_version |
| 174 | */ |
| 175 | function populate_options() { |
| 176 | global $wpdb, $wp_db_version; |
| 177 | |
| 178 | $guessurl = wp_guess_url(); |
| 179 | |
| 180 | do_action('populate_options'); |
| 181 | |
| 182 | if ( ini_get('safe_mode') ) { |
| 183 | // Safe mode screws up mkdir(), so we must use a flat structure. |
| 184 | $uploads_use_yearmonth_folders = 0; |
| 185 | $upload_path = WP_CONTENT_DIR; |
| 186 | } else { |
| 187 | $uploads_use_yearmonth_folders = 1; |
| 188 | $upload_path = WP_CONTENT_DIR . '/uploads'; |
| 189 | } |