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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 |
|---|---|
| 2020 | * Filter the value of a specific post field to edit. |
| 2021 | * |
| 2022 | * The dynamic portion of the hook name, $field, refers to the post field name. |
| 2023 | * |
| 2024 | * @since 2.3.0 |
| 2025 | * |
| 2026 | * @param mixed $value Value of the post field. |
| 2027 | * @param int $post_id Post ID. |
| 2028 | */ |
| 2029 | $value = apply_filters( "edit_{$field}", $value, $post_id ); |
| 2030 | |
| 2031 | /** |
| 2032 | * Filter the value of a specific post field to edit. |
| 2033 | * |
| 2034 | * The dynamic portion of the hook name, $field_no_prefix, refers to |
| 2035 | * the post field name. |
| 2036 | * |
| 2037 | * @since 2.3.0 |
| 2038 | * |