函数原型：
comment_form( array $args = array(), int|WP_Post $post = null )输出一个完整的评论表单，以便在模板中使用。
大多数字符串和表单字段可以通过传递到函数中的$args数组进行控制，而如果您只想添加一个新字段或删除一个字段，也可以选择使用“comment_form_default_fields”过滤器来修改默认字段的数组。所有字段还分别通过“comment_form_field_$name”的过滤器，其中$name是字段数组中使用的键。
参数说明：
$args，要重写的默认参数和表单字段。
-- fields，默认评论字段，默认情况下可通过“comment_form_Default_fields”挂钩进行筛选。
---- author，评论作者字段。
---- email，评论作者 Email 字段。
---- url，评论作者 URL 字段。
---- cookies，评论 cookie 选择加入字段。
-- comment_field，评论文本区域字段HTML。
-- must_log_in，“必须登录才能发表评论”消息的HTML元素。
-- logged_in_as，“以[用户]身份登录”消息的HTML、“编辑配置文件”链接和“注销”链接。
-- comment_notes_before，如果用户未登录，则在评论字段之前显示消息的HTML元素。默认为“您的电子邮件地址将不会发布。”。
-- comment_notes_after，文本区域字段后显示的消息的HTML元素。
-- action，评论表单元素操作属性。默认为“/wp comments post.php”。
-- id_form，评论表单元素id属性。默认“评论表单”。
-- id_submit，comment submit元素id属性。默认“提交”。
-- class_container，评论表单容器类属性。默认为“评论响应”。
-- class_form，评论表单元素类属性。默认的“评论表单”。
-- class_submit，comment submit元素类属性。默认“提交”。
-- name_submit，comment submit元素名称属性。默认为“提交”。
-- title_reply，可翻译的“回复”按钮标签。默认为“留下回复”。
-- title_reply_to，可翻译的“回复”按钮标签。默认为“给%s留下回复”，其中%s是要回复的评论的作者。
-- title_reply_before，评论表单标题前显示的HTML。默认：<h3 id="reply-title" class="comment-reply-title">
-- title_reply_after，评论表单标题后显示的HTML。默认：</h3>
-- cancel_reply_before，取消回复链接前显示的HTML。
-- cancel_reply_after，取消回复链接后显示的HTML。
-- cancel_reply_link，可翻译的“取消回复”按钮标签。默认为“取消回复”。
-- label_submit，可翻译的“提交”按钮标签。可翻译的”提交“按钮标签。默认为“发表评论”。
-- submit_button，“提交”按钮的HTML格式。默认：<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />.
-- submit_field，围绕“提交”按钮和评论隐藏字段的标记的HTML格式。默认值：<p class=“form submit”>%1$s%2$s</p>，其中%1$s是提交按钮标记，%2$s是评论隐藏字段。
-- format，可用值：xhtml, html5
$post，要为其生成表单的Post ID或WP_Post对象。默认当前帖子。
函数源码：
function comment_form( $args = array(), $post = null ) {
$post = get_post( $post );
// Exit the function if the post is invalid or comments are closed.
if ( ! $post || ! comments_open( $post ) ) {
do_action( 'comment_form_comments_closed' );
return;
}
$post_id = $post->ID;
$commenter = wp_get_current_commenter();
$user = wp_get_current_user();
$user_identity = $user->exists() ? $user->display_name : '';
$args = wp_parse_args( $args );
if ( ! isset( $args['format'] ) ) {
$args['format'] = current_theme_supports( 'html5', 'comment-form' ) ? 'html5' : 'xhtml';
}
$req = get_option( 'require_name_email' );
$html5 = 'html5' === $args['format'];
// Define attributes in HTML5 or XHTML syntax.
$required_attribute = ( $html5 ? ' required' : ' required="required"' );
$checked_attribute = ( $html5 ? ' checked' : ' checked="checked"' );
// Identify required fields visually and create a message about the indicator.
$required_indicator = ' ' . wp_required_field_indicator();
$required_text = ' ' . wp_required_field_message();
$fields = array(
'author' => sprintf(
'<p class="comment-form-author">%s %s</p>',
sprintf(
'<label for="author">%s%s</label>',
__( 'Name' ),
( $req ? $required_indicator : '' )
),
sprintf(
'<input id="author" name="author" type="text" value="%s" size="30" maxlength="245" autocomplete="name"%s />',
esc_attr( $commenter['comment_author'] ),
( $req ? $required_attribute : '' )
)
),
'email' => sprintf(
'<p class="comment-form-email">%s %s</p>',
sprintf(
'<label for="email">%s%s</label>',
__( 'Email' ),
( $req ? $required_indicator : '' )
),
sprintf(
'<input id="email" name="email" %s value="%s" size="30" maxlength="100" aria-describedby="email-notes" autocomplete="email"%s />',
( $html5 ? 'type="email"' : 'type="text"' ),
esc_attr( $commenter['comment_author_email'] ),
( $req ? $required_attribute : '' )
)
),
'url' => sprintf(
'<p class="comment-form-url">%s %s</p>',
sprintf(
'<label for="url">%s</label>',
__( 'Website' )
),
sprintf(
'<input id="url" name="url" %s value="%s" size="30" maxlength="200" autocomplete="url" />',
( $html5 ? 'type="url"' : 'type="text"' ),
esc_attr( $commenter['comment_author_url'] )
)
),
);
if ( has_action( 'set_comment_cookies', 'wp_set_comment_cookies' ) && get_option( 'show_comments_cookies_opt_in' ) ) {
$consent = empty( $commenter['comment_author_email'] ) ? '' : $checked_attribute;
$fields['cookies'] = sprintf(
'<p class="comment-form-cookies-consent">%s %s</p>',
sprintf(
'<input id="wp-comment-cookies-consent" name="wp-comment-cookies-consent" type="checkbox" value="yes"%s />',
$consent
),
sprintf(
'<label for="wp-comment-cookies-consent">%s</label>',
__( 'Save my name, email, and website in this browser for the next time I comment.' )
)
);
// Ensure that the passed fields include cookies consent.
if ( isset( $args['fields'] ) && ! isset( $args['fields']['cookies'] ) ) {
$args['fields']['cookies'] = $fields['cookies'];
}
}
$fields = apply_filters( 'comment_form_default_fields', $fields );
$defaults = array(
'fields' => $fields,
'comment_field' => sprintf(
'<p class="comment-form-comment">%s %s</p>',
sprintf(
'<label for="comment">%s%s</label>',
_x( 'Comment', 'noun' ),
$required_indicator
),
'<textarea id="comment" name="comment" cols="45" rows="8" maxlength="65525"' . $required_attribute . '></textarea>'
),
'must_log_in' => sprintf(
'<p class="must-log-in">%s</p>',
sprintf(
/* translators: %s: Login URL. */
__( 'You must be <a href="%s">logged in</a> to post a comment.' ),
/** This filter is documented in wp-includes/link-template.php */
wp_login_url( apply_filters( 'the_permalink', get_permalink( $post_id ), $post_id ) )
)
),
'logged_in_as' => sprintf(
'<p class="logged-in-as">%s%s</p>',
sprintf(
/* translators: 1: User name, 2: Edit user link, 3: Logout URL. */
__( 'Logged in as %1$s. <a href="%2$s">Edit your profile</a>. <a href="%3$s">Log out?</a>' ),
$user_identity,
get_edit_user_link(),
/** This filter is documented in wp-includes/link-template.php */
wp_logout_url( apply_filters( 'the_permalink', get_permalink( $post_id ), $post_id ) )
),
$required_text
),
'comment_notes_before' => sprintf(
'<p class="comment-notes">%s%s</p>',
sprintf(
'<span id="email-notes">%s</span>',
__( 'Your email address will not be published.' )
),
$required_text
),
'comment_notes_after' => '',
'action' => site_url( '/wp-comments-post.php' ),
'id_form' => 'commentform',
'id_submit' => 'submit',
'class_container' => 'comment-respond',
'class_form' => 'comment-form',
'class_submit' => 'submit',
'name_submit' => 'submit',
'title_reply' => __( 'Leave a Reply' ),
/* translators: %s: Author of the comment being replied to. */
'title_reply_to' => __( 'Leave a Reply to %s' ),
'title_reply_before' => '<h3 id="reply-title" class="comment-reply-title">',
'title_reply_after' => '</h3>',
'cancel_reply_before' => ' <small>',
'cancel_reply_after' => '</small>',
'cancel_reply_link' => __( 'Cancel reply' ),
'label_submit' => __( 'Post Comment' ),
'submit_button' => '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />',
'submit_field' => '<p class="form-submit">%1$s %2$s</p>',
'format' => 'xhtml',
);
$args = wp_parse_args( $args, apply_filters( 'comment_form_defaults', $defaults ) );
// Ensure that the filtered arguments contain all required default values.
$args = array_merge( $defaults, $args );
// Remove `aria-describedby` from the email field if there's no associated description.
if ( isset( $args['fields']['email'] ) && false === strpos( $args['comment_notes_before'], 'id="email-notes"' ) ) {
$args['fields']['email'] = str_replace(
' aria-describedby="email-notes"',
'',
$args['fields']['email']
);
}
do_action( 'comment_form_before' );
?>
<div id="respond" class="<?php echo esc_attr( $args['class_container'] ); ?>">
<?php
echo $args['title_reply_before'];
comment_form_title( $args['title_reply'], $args['title_reply_to'], true, $post_id );
if ( get_option( 'thread_comments' ) ) {
echo $args['cancel_reply_before'];
cancel_comment_reply_link( $args['cancel_reply_link'] );
echo $args['cancel_reply_after'];
}
echo $args['title_reply_after'];
if ( get_option( 'comment_registration' ) && ! is_user_logged_in() ) :
echo $args['must_log_in'];
do_action( 'comment_form_must_log_in_after' );
else :
printf(
'<form action="%s" method="post" id="%s" class="%s"%s>',
esc_url( $args['action'] ),
esc_attr( $args['id_form'] ),
esc_attr( $args['class_form'] ),
( $html5 ? ' novalidate' : '' )
);
do_action( 'comment_form_top' );
if ( is_user_logged_in() ) :
echo apply_filters( 'comment_form_logged_in', $args['logged_in_as'], $commenter, $user_identity );
do_action( 'comment_form_logged_in_after', $commenter, $user_identity );
else :
echo $args['comment_notes_before'];
endif;
// Prepare an array of all fields, including the textarea.
$comment_fields = array( 'comment' => $args['comment_field'] ) + (array) $args['fields'];
$comment_fields = apply_filters( 'comment_form_fields', $comment_fields );
// Get an array of field names, excluding the textarea.
$comment_field_keys = array_diff( array_keys( $comment_fields ), array( 'comment' ) );
// Get the first and the last field name, excluding the textarea.
$first_field = reset( $comment_field_keys );
$last_field = end( $comment_field_keys );
foreach ( $comment_fields as $name => $field ) {
if ( 'comment' === $name ) {
echo apply_filters( 'comment_form_field_comment', $field );
echo $args['comment_notes_after'];
} elseif ( ! is_user_logged_in() ) {
if ( $first_field === $name ) {
do_action( 'comment_form_before_fields' );
}
echo apply_filters( "comment_form_field_{$name}", $field ) . "\n";
if ( $last_field === $name ) {
do_action( 'comment_form_after_fields' );
}
}
}
$submit_button = sprintf(
$args['submit_button'],
esc_attr( $args['name_submit'] ),
esc_attr( $args['id_submit'] ),
esc_attr( $args['class_submit'] ),
esc_attr( $args['label_submit'] )
);
$submit_button = apply_filters( 'comment_form_submit_button', $submit_button, $args );
$submit_field = sprintf(
$args['submit_field'],
$submit_button,
get_comment_id_fields( $post_id )
);
echo apply_filters( 'comment_form_submit_field', $submit_field, $args );
do_action( 'comment_form', $post_id );
echo '</form>';
endif;
?>
</div><!-- #respond -->
<?php
do_action( 'comment_form_after' );
}
包含钩子：
do_action( 'comment_form', int $post_id )
// Fires at the bottom of the comment form, inside the closing form tag.
do_action( 'comment_form_after' )
// Fires after the comment form.
do_action( 'comment_form_after_fields' )
// Fires after the comment fields in the comment form, excluding the textarea.
do_action( 'comment_form_before' )
// Fires before the comment form.
do_action( 'comment_form_before_fields' )
// Fires before the comment fields in the comment form, excluding the textarea.
do_action( 'comment_form_comments_closed' )
// Fires after the comment form if comments are closed.
apply_filters( 'comment_form_defaults', array $defaults )
// Filters the comment form default arguments.
apply_filters( 'comment_form_default_fields', string[] $fields )
// Filters the default comment form fields.
apply_filters( 'comment_form_fields', array $comment_fields )
// Filters the comment form fields, including the textarea.
apply_filters( 'comment_form_field_comment', string $args_comment_field )
// Filters the content of the comment textarea field for display.
apply_filters( "comment_form_field_{$name}", string $field )
// Filters a comment form field for display.
apply_filters( 'comment_form_logged_in', string $args_logged_in, array $commenter, string $user_identity )
// Filters the ‘logged in’ message for the comment form for display.
do_action( 'comment_form_logged_in_after', array $commenter, string $user_identity )
// Fires after the is_user_logged_in() check in the comment form.
do_action( 'comment_form_must_log_in_after' )
// Fires after the HTML-formatted ‘must log in after’ message in the comment form.
apply_filters( 'comment_form_submit_button', string $submit_button, array $args )
// Filters the submit button for the comment form to display.
apply_filters( 'comment_form_submit_field', string $submit_field, array $args )
// Filters the submit field for the comment form to display.
do_action( 'comment_form_top' )
// Fires at the top of the comment form, inside the form tag.
apply_filters( 'the_permalink', string $permalink, int|WP_Post $post )
// Filters the display of the permalink for the current post.使用举例：
//Declare Vars
$comment_send = 'Send';
$comment_reply = 'Leave a Message';
$comment_reply_to = 'Reply';
$comment_author = 'Name';
$comment_email = 'E-Mail';
$comment_body = 'Comment';
$comment_url = 'Website';
$comment_cookies_1 = ' By commenting you accept the';
$comment_cookies_2 = ' Privacy Policy';
$comment_before = 'Registration isn\'t required.';
$comment_cancel = 'Cancel Reply';
//Array
$comments_args = array(
//Define Fields
'fields' => array(
//Author field
'author' => '<p class="comment-form-author"><br /><input id="author" name="author" aria-required="true" placeholder="' . $comment_author .'"></input></p>',
//Email Field
'email' => '<p class="comment-form-email"><br /><input id="email" name="email" placeholder="' . $comment_email .'"></input></p>',
//URL Field
'url' => '<p class="comment-form-url"><br /><input id="url" name="url" placeholder="' . $comment_url .'"></input></p>',
//Cookies
'cookies' => '<input type="checkbox" required>' . $comment_cookies_1 . '<a href="' . get_privacy_policy_url() . '">' . $comment_cookies_2 . '</a>',
),
// Change the title of send button
'label_submit' => __( $comment_send ),
// Change the title of the reply section
'title_reply' => __( $comment_reply ),
// Change the title of the reply section
'title_reply_to' => __( $comment_reply_to ),
//Cancel Reply Text
'cancel_reply_link' => __( $comment_cancel ),
// Redefine your own textarea (the comment body).
'comment_field' => '<p class="comment-form-comment"><br /><textarea id="comment" name="comment" aria-required="true" placeholder="' . $comment_body .'"></textarea></p>',
//Message Before Comment
'comment_notes_before' => __( $comment_before),
// Remove "Text or HTML to be displayed after the set of comment fields".
'comment_notes_after' => '',
//Submit Button ID
'id_submit' => __( 'comment-submit' ),
);
comment_form( $comments_args );-
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