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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 |
|---|---|
| 2012 | /** |
| 2013 | * Filter the comment form default arguments. |
| 2014 | * |
| 2015 | * Use 'comment_form_default_fields' to filter the comment fields. |
| 2016 | * |
| 2017 | * @since 3.0.0 |
| 2018 | * |
| 2019 | * @param array $defaults The default comment form arguments. |
| 2020 | */ |
| 2021 | $args = wp_parse_args( $args, apply_filters( 'comment_form_defaults', $defaults ) ); |
| 2022 | |
| 2023 | ?> |
| 2024 | <?php if ( comments_open( $post_id ) ) : ?> |
| 2025 | <?php |
| 2026 | /** |
| 2027 | * Fires before the comment form. |
| 2028 | * |
| 2029 | * @since 3.0.0 |
| 2030 | */ |