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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 |
|---|---|
| 2598 | * the post field name. |
| 2599 | * |
| 2600 | * @since 2.3.0 |
| 2601 | * |
| 2602 | * @param mixed $value Value of the post field. |
| 2603 | * @param int $post_id Post ID. |
| 2604 | */ |
| 2605 | $value = apply_filters( "{$field_no_prefix}_edit_pre", $value, $post_id ); |
| 2606 | } else { |
| 2607 | $value = apply_filters( "edit_post_{$field}", $value, $post_id ); |
| 2608 | } |
| 2609 | |
| 2610 | if ( in_array( $field, $format_to_edit, true ) ) { |
| 2611 | if ( 'post_content' === $field ) { |
| 2612 | $value = format_to_edit( $value, user_can_richedit() ); |
| 2613 | } else { |
| 2614 | $value = format_to_edit( $value ); |
| 2615 | } |
| 2616 | } else { |