Get KSES Allowed HTML with SVGs

kses-allowed-html-svgs.php

<?php
/**
 * Returns appropriate html for KSES.
 *
 * @param bool $svg Whether to add SVG data to KSES.
 */
public static function get_kses_allowed_html( $svg = true ) {
	$allowed_tags = wp_kses_allowed_html();

	$allowed_tags['nav']        = array(
		'class' => array(),
	);
	$allowed_tags['a']['class'] = array();

	if ( ! $svg ) {
		return $allowed_tags;
	}
	$allowed_tags['svg'] = array(
		'xmlns'       => array(),
		'fill'        => array(),
		'viewbox'     => array(),
		'role'        => array(),
		'aria-hidden' => array(),
		'focusable'   => array(),
		'class'       => array(),
	);

	$allowed_tags['path'] = array(
		'd'       => array(),
		'fill'    => array(),
		'opacity' => array(),
	);

	$allowed_tags['g'] = array();

	$allowed_tags['use'] = array(
		'xlink:href' => array(),
	);

	$allowed_tags['symbol'] = array(
		'aria-hidden' => array(),
		'viewBox'     => array(),
		'id'          => array(),
		'xmls'        => array(),
	);

	return $allowed_tags;
}