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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 |
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2602 | $comment_fields = array( 'comment' => $args['comment_field'] ) + (array) $args['fields']; |
2603 |
|
2604 | /** |
2605 | * Filters the comment form fields, including the textarea. |
2606 | * |
2607 | * @since 4.4.0 |
2608 | * |
2609 | * @param array $comment_fields The comment fields. |
2610 | */ |
2611 | $comment_fields = apply_filters( 'comment_form_fields', $comment_fields ); |
2612 |
|
2613 | // Get an array of field names, excluding the textarea. |
2614 | $comment_field_keys = array_diff( array_keys( $comment_fields ), array( 'comment' ) ); |
2615 |
|
2616 | // Get the first and the last field name, excluding the textarea. |
2617 | $first_field = reset( $comment_field_keys ); |
2618 | $last_field = end( $comment_field_keys ); |
2619 |
|
2620 | foreach ( $comment_fields as $name => $field ) { |