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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 |
|---|---|
| 566 | * @since 2.0.0 |
| 567 | */ |
| 568 | $GLOBALS['wp_roles'] = new WP_Roles(); |
| 569 | |
| 570 | /** |
| 571 | * Fires before the theme is loaded. |
| 572 | * |
| 573 | * @since 2.6.0 |
| 574 | */ |
| 575 | do_action( 'setup_theme' ); |
| 576 | |
| 577 | // Define the template related constants. |
| 578 | wp_templating_constants(); |
| 579 | |
| 580 | // Load the default text localization domain. |
| 581 | load_default_textdomain(); |
| 582 | |
| 583 | $locale = get_locale(); |
| 584 | $locale_file = WP_LANG_DIR . "/$locale.php"; |