comment_form_submit_button │ filter-hook │ WP 4.2.0

Filters the submit button for the comment form to display.

Usage

add_filter( 'comment_form_submit_button', 'wp_kama_comment_form_submit_button_filter', 10, 2 );

/**
 * Function for `comment_form_submit_button` filter-hook.
 * 
 * @param string $submit_button HTML markup for the submit button.
 * @param array  $args          Arguments passed to comment_form().
 *
 * @return string
 */
function wp_kama_comment_form_submit_button_filter( $submit_button, $args ){

	// filter...
	return $submit_button;
}

$submit_button(string)

HTML markup for the submit button.

$args(array)

Arguments passed to comment_form().

Changelog

Where the hook is called

$submit_button = apply_filters( 'comment_form_submit_button', $submit_button, $args );

Where the hook is used in WordPress