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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 |
|---|---|
| 89 | /** |
| 90 | * Fires when the locale is switched. |
| 91 | * |
| 92 | * @since 4.7.0 |
| 93 | * @since 6.2.0 The `$user_id` parameter was added. |
| 94 | * |
| 95 | * @param string $locale The new locale. |
| 96 | * @param false|int $user_id User ID for context if available. |
| 97 | */ |
| 98 | do_action( 'switch_locale', $locale, $user_id ); |
| 99 | |
| 100 | return true; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Switches the translations according to the given user's locale. |
| 105 | * |
| 106 | * @since 6.2.0 |
| 107 | * |