Shortcode to get current post terms in HTML | WordPress

get_current_post_terms.php

add_shortcode('get_current_post_terms', function( $atts ) {
    $atts = shortcode_atts( array(
        'taxonomy' => 'category',
        'limit' => '1',
        'fields' => 'slugs',
        'separator' => ',',
        'print' => 0
    ), $atts );

    global $post;
    $slugs = array();

    if ( $post ) {
        $slugs = wp_get_post_terms( $post->ID, $atts['taxonomy'], array(
            'number' => intval( $atts['limit'] ),
            'fields' => sanitize_text_field( $atts['fields'] )
        ) );
    }
    if ( ! is_wp_error( $slugs ) && ! empty( $slugs ) ) {
        $terms = implode( $atts['separator'], $slugs );
        if ( $atts['print'] ) {
            echo $terms;
        } else {
            return $terms;
        }
    }
});