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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.
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352 |
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353 | /** |
354 | * Filters the locales requested for plugin translations. |
355 | * |
356 | * @since 3.7.0 |
357 | * @since 4.5.0 The default value of the `$locales` parameter changed to include all locales. |
358 | * |
359 | * @param array $locales Plugin locales. Default is all available locales of the site. |
360 | */ |
361 | $locales = apply_filters( 'plugins_update_check_locales', $locales ); |
362 | $locales = array_unique( $locales ); |
363 |
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364 | if ( $doing_cron ) { |
365 | $timeout = 30; |
366 | } else { |
367 | // Three seconds, plus one extra second for every 10 plugins. |
368 | $timeout = 3 + (int) ( count( $plugins ) / 10 ); |
369 | } |
370 |
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