Use placeholders instead of labels in comment form

Written by Bill EricksonPublished on October 22, 2015Updated on December 5, 2018

Not recommended for usability reasons.

	<?php

	/**
	* Change comment form textarea to use placeholder
	*
	* @since 1.0.0
	* @param array $args
	* @return array
	*/
	function ea_comment_textarea_placeholder( $args ) {
	$args['comment_field'] = str_replace( 'textarea', 'textarea placeholder="comment"', $args['comment_field'] );
	return $args;
	}
	add_filter( 'comment_form_defaults', 'ea_comment_textarea_placeholder' );

	/**
	* Comment Form Fields Placeholder
	*
	*/
	function be_comment_form_fields( $fields ) {
	foreach( $fields as &$field ) {
	$field = str_replace( 'id="author"', 'id="author" placeholder="name*"', $field );
	$field = str_replace( 'id="email"', 'id="email" placeholder="email*"', $field );
	$field = str_replace( 'id="url"', 'id="url" placeholder="website"', $field );
	}
	return $fields;
	}
	add_filter( 'comment_form_default_fields', 'be_comment_form_fields' );