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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 |
|---|---|
| 2959 | |
| 2960 | /** |
| 2961 | * Filters whether a post trashing should take place. |
| 2962 | * |
| 2963 | * @since 4.9.0 |
| 2964 | * |
| 2965 | * @param bool $trash Whether to go forward with trashing. |
| 2966 | * @param WP_Post $post Post object. |
| 2967 | */ |
| 2968 | $check = apply_filters( 'pre_trash_post', null, $post ); |
| 2969 | if ( null !== $check ) { |
| 2970 | return $check; |
| 2971 | } |
| 2972 | |
| 2973 | /** |
| 2974 | * Fires before a post is sent to the trash. |
| 2975 | * |
| 2976 | * @since 3.3.0 |
| 2977 | * |