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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 |
|---|---|
| 3279 | |
| 3280 | /** |
| 3281 | * Filters whether a post trashing should take place. |
| 3282 | * |
| 3283 | * @since 4.9.0 |
| 3284 | * |
| 3285 | * @param bool|null $trash Whether to go forward with trashing. |
| 3286 | * @param WP_Post $post Post object. |
| 3287 | */ |
| 3288 | $check = apply_filters( 'pre_trash_post', null, $post ); |
| 3289 | |
| 3290 | if ( null !== $check ) { |
| 3291 | return $check; |
| 3292 | } |
| 3293 | |
| 3294 | /** |
| 3295 | * Fires before a post is sent to the Trash. |
| 3296 | * |
| 3297 | * @since 3.3.0 |