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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 |
|---|---|
| 353 | function populate_options() { |
| 354 | global $wpdb, $wp_db_version, $wp_current_db_version; |
| 355 | |
| 356 | $guessurl = wp_guess_url(); |
| 357 | /** |
| 358 | * Fires before creating WordPress options and populating their default values. |
| 359 | * |
| 360 | * @since 2.6.0 |
| 361 | */ |
| 362 | do_action( 'populate_options' ); |
| 363 | |
| 364 | if ( ini_get('safe_mode') ) { |
| 365 | // Safe mode can break mkdir() so use a flat structure by default. |
| 366 | $uploads_use_yearmonth_folders = 0; |
| 367 | } else { |
| 368 | $uploads_use_yearmonth_folders = 1; |
| 369 | } |
| 370 | |
| 371 | // If WP_DEFAULT_THEME doesn't exist, fall back to the latest core default theme. |