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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 |
|---|---|
| 2877 | * |
| 2878 | * The dynamic portion of the hook name, `$field`, refers to the post |
| 2879 | * field name. |
| 2880 | * |
| 2881 | * @since 2.3.0 |
| 2882 | * |
| 2883 | * @param mixed $value Value of the post field. |
| 2884 | * @param int $post_id Post ID. |
| 2885 | */ |
| 2886 | $value = apply_filters( "edit_{$field}", $value, $post_id ); |
| 2887 | |
| 2888 | /** |
| 2889 | * Filters the value of a specific post field to edit. |
| 2890 | * |
| 2891 | * The dynamic portion of the hook name, `$field_no_prefix`, refers to |
| 2892 | * the post field name. |
| 2893 | * |
| 2894 | * @since 2.3.0 |
| 2895 | * |