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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 |
|---|---|
| 52 | |
| 53 | $locale = get_locale(); |
| 54 | /** |
| 55 | * Filter the locale requested for WordPress core translations. |
| 56 | * |
| 57 | * @since 2.8.0 |
| 58 | * |
| 59 | * @param string $locale Current locale. |
| 60 | */ |
| 61 | $locale = apply_filters( 'core_version_check_locale', $locale ); |
| 62 | |
| 63 | // Update last_checked for current to prevent multiple blocking requests if request hangs |
| 64 | $current->last_checked = time(); |
| 65 | set_site_transient( 'update_core', $current ); |
| 66 | |
| 67 | if ( method_exists( $wpdb, 'db_version' ) ) |
| 68 | $mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version()); |
| 69 | else |
| 70 | $mysql_version = 'N/A'; |