Source

File: wp-includes/comment-template.php

function get_comments_number_text( $zero = false, $one = false, $more = false, $post_id = 0 ) {
	$number = get_comments_number( $post_id );

	if ( $number > 1 ) {
		if ( false === $more ) {
			/* translators: %s: Number of comments. */
			$output = sprintf( _n( '%s Comment', '%s Comments', $number ), number_format_i18n( $number ) );
		} else {
			// % Comments
			/*
			 * translators: If comment number in your language requires declension,
			 * translate this to 'on'. Do not translate into your own language.
			 */
			if ( 'on' === _x( 'off', 'Comment number declension: on or off' ) ) {
				$text = preg_replace( '#<span class="screen-reader-text">.+?</span>#', '', $more );
				$text = preg_replace( '/&.+?;/', '', $text ); // Kill entities.
				$text = trim( strip_tags( $text ), '% ' );

				// Replace '% Comments' with a proper plural form.
				if ( $text && ! preg_match( '/[0-9]+/', $text ) && false !== strpos( $more, '%' ) ) {
					/* translators: %s: Number of comments. */
					$new_text = _n( '%s Comment', '%s Comments', $number );
					$new_text = trim( sprintf( $new_text, '' ) );

					$more = str_replace( $text, $new_text, $more );
					if ( false === strpos( $more, '%' ) ) {
						$more = '% ' . $more;
					}
				}
			}

			$output = str_replace( '%', number_format_i18n( $number ), $more );
		}
	} elseif ( 0 == $number ) {
		$output = ( false === $zero ) ? __( 'No Comments' ) : $zero;
	} else { // Must be one.
		$output = ( false === $one ) ? __( '1 Comment' ) : $one;
	}
	/**
	 * Filters the comments count for display.
	 *
	 * @since 1.5.0
	 *
	 * @see _n()
	 *
	 * @param string $output A translatable string formatted based on whether the count
	 *                       is equal to 0, 1, or 1+.
	 * @param int    $number The number of post comments.
	 */
	return apply_filters( 'comments_number', $output, $number );
}