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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 |
|---|---|
| 3131 | |
| 3132 | /** |
| 3133 | * Filters whether a post trashing should take place. |
| 3134 | * |
| 3135 | * @since 4.9.0 |
| 3136 | * |
| 3137 | * @param bool|null $trash Whether to go forward with trashing. |
| 3138 | * @param WP_Post $post Post object. |
| 3139 | */ |
| 3140 | $check = apply_filters( 'pre_trash_post', null, $post ); |
| 3141 | if ( null !== $check ) { |
| 3142 | return $check; |
| 3143 | } |
| 3144 | |
| 3145 | /** |
| 3146 | * Fires before a post is sent to the Trash. |
| 3147 | * |
| 3148 | * @since 3.3.0 |
| 3149 | * |