Retrieve SVG Content from External URL

/**
 * Retrieve SVG content from a remote URL.
 *
 * This helper function fetches SVG markup using the
 * WordPress HTTP API and returns the SVG content
 * for inline usage in themes or plugins.
 *
 */
function sj_get_svg_content_from_url( $svg_url ) {

    // Fetch SVG content from the provided URL.
    $response = wp_remote_get( $svg_url );

    // Check for request errors.
    if ( is_wp_error( $response ) ) {

        return 'Unable to retrieve SVG content: ' . $response->get_error_message();
    }

    // Retrieve the response body.
    $svg_content = wp_remote_retrieve_body( $response );

    // Return SVG content if available.
    if ( ! empty( $svg_content ) ) {

        return $svg_content;
    }

    return '';
}