+/**
+ * Output a complete commenting form for use within a template.
+ *
+ * Most strings and form fields may be controlled through the $args array passed
+ * into the function, while you may also choose to use the comment_form_default_fields
+ * filter to modify the array of default fields if you'd just like to add a new
+ * one or remove a single field. All fields are also individually passed through
+ * a filter of the form comment_form_field_$name where $name is the key used
+ * in the array of fields.
+ *
+ * @since 3.0.0
+ *
+ * @param array $args {
+ * Optional. Default arguments and form fields to override.
+ *
+ * @type array $fields {
+ * Default comment fields, filterable by default via the 'comment_form_default_fields' hook.
+ *
+ * @type string $author Comment author field HTML.
+ * @type string $email Comment author email field HTML.
+ * @type string $url Comment author URL field HTML.
+ * }
+ * @type string $comment_field The comment textarea field HTML.
+ * @type string $must_log_in HTML element for a 'must be logged in to comment' message.
+ * @type string $logged_in_as HTML element for a 'logged in as <user>' message.
+ * @type string $comment_notes_before HTML element for a message displayed before the comment form.
+ * Default 'Your email address will not be published.'.
+ * @type string $comment_notes_after HTML element for a message displayed after the comment form.
+ * Default 'You may use these HTML tags and attributes ...'.
+ * @type string $id_form The comment form element id attribute. Default 'commentform'.
+ * @type string $id_submit The comment submit element id attribute. Default 'submit'.
+ * @type string $title_reply The translatable 'reply' button label. Default 'Leave a Reply'.
+ * @type string $title_reply_to The translatable 'reply-to' button label. Default 'Leave a Reply to %s',
+ * where %s is the author of the comment being replied to.
+ * @type string $cancel_reply_link The translatable 'cancel reply' button label. Default 'Cancel reply'.
+ * @type string $label_submit The translatable 'submit' button label. Default 'Post a comment'.
+ * @type string $format The comment form format. Default 'xhtml'. Accepts 'xhtml', 'html5'.
+ * }
+ * @param int|WP_Post $post_id Post ID or WP_Post object to generate the form for. Default current post.
+ */
+function comment_form( $args = array(), $post_id = null ) {
+ if ( null === $post_id )
+ $post_id = get_the_ID();
+ else
+ $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' );
+ $aria_req = ( $req ? " aria-required='true'" : '' );
+ $html5 = 'html5' === $args['format'];
+ $fields = array(
+ 'author' => '<p class="comment-form-author">' . '<label for="author">' . __( 'Name' ) . ( $req ? ' <span class="required">*</span>' : '' ) . '</label> ' .
+ '<input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30"' . $aria_req . ' /></p>',
+ 'email' => '<p class="comment-form-email"><label for="email">' . __( 'Email' ) . ( $req ? ' <span class="required">*</span>' : '' ) . '</label> ' .
+ '<input id="email" name="email" ' . ( $html5 ? 'type="email"' : 'type="text"' ) . ' value="' . esc_attr( $commenter['comment_author_email'] ) . '" size="30"' . $aria_req . ' /></p>',
+ 'url' => '<p class="comment-form-url"><label for="url">' . __( 'Website' ) . '</label> ' .
+ '<input id="url" name="url" ' . ( $html5 ? 'type="url"' : 'type="text"' ) . ' value="' . esc_attr( $commenter['comment_author_url'] ) . '" size="30" /></p>',
+ );
+
+ $required_text = sprintf( ' ' . __('Required fields are marked %s'), '<span class="required">*</span>' );
+
+ /**
+ * Filter the default comment form fields.
+ *
+ * @since 3.0.0
+ *
+ * @param array $fields The default comment fields.
+ */
+ $fields = apply_filters( 'comment_form_default_fields', $fields );
+ $defaults = array(
+ 'fields' => $fields,
+ 'comment_field' => '<p class="comment-form-comment"><label for="comment">' . _x( 'Comment', 'noun' ) . '</label> <textarea id="comment" name="comment" cols="45" rows="8" aria-required="true"></textarea></p>',
+ /** This filter is documented in wp-includes/link-template.php */
+ 'must_log_in' => '<p class="must-log-in">' . sprintf( __( 'You must be <a href="%s">logged in</a> to post a comment.' ), wp_login_url( apply_filters( 'the_permalink', get_permalink( $post_id ) ) ) ) . '</p>',
+ /** This filter is documented in wp-includes/link-template.php */
+ 'logged_in_as' => '<p class="logged-in-as">' . sprintf( __( 'Logged in as <a href="%1$s">%2$s</a>. <a href="%3$s" title="Log out of this account">Log out?</a>' ), get_edit_user_link(), $user_identity, wp_logout_url( apply_filters( 'the_permalink', get_permalink( $post_id ) ) ) ) . '</p>',
+ 'comment_notes_before' => '<p class="comment-notes">' . __( 'Your email address will not be published.' ) . ( $req ? $required_text : '' ) . '</p>',
+ 'comment_notes_after' => '<p class="form-allowed-tags">' . sprintf( __( 'You may use these <abbr title="HyperText Markup Language">HTML</abbr> tags and attributes: %s' ), ' <code>' . allowed_tags() . '</code>' ) . '</p>',
+ 'id_form' => 'commentform',
+ 'id_submit' => 'submit',
+ 'title_reply' => __( 'Leave a Reply' ),
+ 'title_reply_to' => __( 'Leave a Reply to %s' ),
+ 'cancel_reply_link' => __( 'Cancel reply' ),
+ 'label_submit' => __( 'Post Comment' ),
+ 'format' => 'xhtml',
+ );
+
+ /**
+ * Filter the comment form default arguments.
+ *
+ * Use 'comment_form_default_fields' to filter the comment fields.
+ *
+ * @since 3.0.0
+ *
+ * @param array $defaults The default comment form arguments.
+ */
+ $args = wp_parse_args( $args, apply_filters( 'comment_form_defaults', $defaults ) );
+
+ ?>
+ <?php if ( comments_open( $post_id ) ) : ?>
+ <?php
+ /**
+ * Fires before the comment form.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_before' );
+ ?>
+ <div id="respond" class="comment-respond">
+ <h3 id="reply-title" class="comment-reply-title"><?php comment_form_title( $args['title_reply'], $args['title_reply_to'] ); ?> <small><?php cancel_comment_reply_link( $args['cancel_reply_link'] ); ?></small></h3>
+ <?php if ( get_option( 'comment_registration' ) && !is_user_logged_in() ) : ?>
+ <?php echo $args['must_log_in']; ?>
+ <?php
+ /**
+ * Fires after the HTML-formatted 'must log in after' message in the comment form.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_must_log_in_after' );
+ ?>
+ <?php else : ?>
+ <form action="<?php echo site_url( '/wp-comments-post.php' ); ?>" method="post" id="<?php echo esc_attr( $args['id_form'] ); ?>" class="comment-form"<?php echo $html5 ? ' novalidate' : ''; ?>>
+ <?php
+ /**
+ * Fires at the top of the comment form, inside the <form> tag.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_top' );
+ ?>
+ <?php if ( is_user_logged_in() ) : ?>
+ <?php
+ /**
+ * Filter the 'logged in' message for the comment form for display.
+ *
+ * @since 3.0.0
+ *
+ * @param string $args_logged_in The logged-in-as HTML-formatted message.
+ * @param array $commenter An array containing the comment author's
+ * username, email, and URL.
+ * @param string $user_identity If the commenter is a registered user,
+ * the display name, blank otherwise.
+ */
+ echo apply_filters( 'comment_form_logged_in', $args['logged_in_as'], $commenter, $user_identity );
+ ?>
+ <?php
+ /**
+ * Fires after the is_user_logged_in() check in the comment form.
+ *
+ * @since 3.0.0
+ *
+ * @param array $commenter An array containing the comment author's
+ * username, email, and URL.
+ * @param string $user_identity If the commenter is a registered user,
+ * the display name, blank otherwise.
+ */
+ do_action( 'comment_form_logged_in_after', $commenter, $user_identity );
+ ?>
+ <?php else : ?>
+ <?php echo $args['comment_notes_before']; ?>
+ <?php
+ /**
+ * Fires before the comment fields in the comment form.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_before_fields' );
+ foreach ( (array) $args['fields'] as $name => $field ) {
+ /**
+ * Filter a comment form field for display.
+ *
+ * The dynamic portion of the filter hook, $name, refers to the name
+ * of the comment form field. Such as 'author', 'email', or 'url'.
+ *
+ * @since 3.0.0
+ *
+ * @param string $field The HTML-formatted output of the comment form field.
+ */
+ echo apply_filters( "comment_form_field_{$name}", $field ) . "\n";
+ }
+ /**
+ * Fires after the comment fields in the comment form.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_after_fields' );
+ ?>
+ <?php endif; ?>
+ <?php
+ /**
+ * Filter the content of the comment textarea field for display.
+ *
+ * @since 3.0.0
+ *
+ * @param string $args_comment_field The content of the comment textarea field.
+ */
+ echo apply_filters( 'comment_form_field_comment', $args['comment_field'] );
+ ?>
+ <?php echo $args['comment_notes_after']; ?>
+ <p class="form-submit">
+ <input name="submit" type="submit" id="<?php echo esc_attr( $args['id_submit'] ); ?>" value="<?php echo esc_attr( $args['label_submit'] ); ?>" />
+ <?php comment_id_fields( $post_id ); ?>
+ </p>
+ <?php
+ /**
+ * Fires at the bottom of the comment form, inside the closing </form> tag.
+ *
+ * @since 1.5.0
+ *
+ * @param int $post_id The post ID.
+ */
+ do_action( 'comment_form', $post_id );
+ ?>
+ </form>
+ <?php endif; ?>
+ </div><!-- #respond -->
+ <?php
+ /**
+ * Fires after the comment form.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_after' );
+ else :
+ /**
+ * Fires after the comment form if comments are closed.
+ *
+ * @since 3.0.0
+ */
+ do_action( 'comment_form_comments_closed' );
+ endif;
+}