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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 |
|---|---|
| 2435 | $comment_fields = array( 'comment' => $args['comment_field'] ) + (array) $args['fields']; |
| 2436 | |
| 2437 | /** |
| 2438 | * Filters the comment form fields, including the textarea. |
| 2439 | * |
| 2440 | * @since 4.4.0 |
| 2441 | * |
| 2442 | * @param array $comment_fields The comment fields. |
| 2443 | */ |
| 2444 | $comment_fields = apply_filters( 'comment_form_fields', $comment_fields ); |
| 2445 | |
| 2446 | // Get an array of field names, excluding the textarea |
| 2447 | $comment_field_keys = array_diff( array_keys( $comment_fields ), array( 'comment' ) ); |
| 2448 | |
| 2449 | // Get the first and the last field name, excluding the textarea |
| 2450 | $first_field = reset( $comment_field_keys ); |
| 2451 | $last_field = end( $comment_field_keys ); |
| 2452 | |
| 2453 | foreach ( $comment_fields as $name => $field ) { |