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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 |
|---|---|
| 529 | |
| 530 | /** |
| 531 | * Filters the locales requested for theme translations. |
| 532 | * |
| 533 | * @since 3.7.0 |
| 534 | * @since 4.5.0 The default value of the `$locales` parameter changed to include all locales. |
| 535 | * |
| 536 | * @param array $locales Theme locales. Default is all available locales of the site. |
| 537 | */ |
| 538 | $locales = apply_filters( 'themes_update_check_locales', $locales ); |
| 539 | $locales = array_unique( $locales ); |
| 540 | |
| 541 | if ( $doing_cron ) { |
| 542 | $timeout = 30; |
| 543 | } else { |
| 544 | // Three seconds, plus one extra second for every 10 themes |
| 545 | $timeout = 3 + (int) ( count( $themes ) / 10 ); |
| 546 | } |
| 547 | |