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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 |
|---|---|
| 903 | * |
| 904 | * Returning an array will short-circuit the normal retrieval of ready |
| 905 | * cron jobs, causing the function to return the filtered value instead. |
| 906 | * |
| 907 | * @since 5.1.0 |
| 908 | * |
| 909 | * @param null|array $pre Array of ready cron tasks to return instead. Default null |
| 910 | * to continue using results from _get_cron_array(). |
| 911 | */ |
| 912 | $pre = apply_filters( 'pre_get_ready_cron_jobs', null ); |
| 913 | if ( null !== $pre ) { |
| 914 | return $pre; |
| 915 | } |
| 916 | |
| 917 | $crons = _get_cron_array(); |
| 918 | |
| 919 | if ( false === $crons ) { |
| 920 | return array(); |
| 921 | } |