WP Sanitize SVG markup

functions.php

/**
 * Sanitize SVG markup for front-end display.
 *
 * @link https://developer.wordpress.org/reference/functions/wp_kses/#comment-6185
 *
 * @param  string $svg SVG markup to sanitize.
 * @return string      Sanitized markup.
 */
function sanitize_svg( $svg = '' ) {
	$allowed_html = array(
		'svg'  => array(
			'xmlns'       => array(),
			'fill'        => array(),
			'viewbox'     => array(),
			'role'        => array(),
			'aria-hidden' => array(),
			'focusable'   => array(),
			'height'      => array(),
			'width'       => array(),
		),
		'path' => array(
			'd'    => array(),
			'fill' => array(),
		),
	);

	return wp_kses( $svg, $allowed_html );
}