Custom Post Type URL Rewrite Made Easy!

Custom Post Type URL Rewrite Made Easy!

/*
You can rewrite custom post type links anyway you want following below code. I have completely replaced CPT slug with a custom metabox field for each post type.
Resources: 
1. http://wordpress.stackexchange.com/questions/83531/custom-post-type-404s-with-rewriting-even-after-resetting-permalinks
2. http://shibashake.com/wordpress-theme/custom-post-type-permalinks-part-2
*/

/* Register Custom Post Type */

function viz360_project_post_type() {

	add_rewrite_tag('%client_name%','(.+)');

	$labels = array();
	$args = array(
		'label'                 => __( 'Project', 'viz360' ),
		'labels'                => $labels,
		'rewrite' 				=> array('slug' =>'%client_name%')
	);
  
	register_post_type( 'viz360_projects', $args );
}
add_action( 'init', 'viz360_project_post_type', 0 );

/**
 * get customized url by meta boxes
 */
 
function viz_remove_slug( $permalink, $post, $leavename ) {

    if ( stripos( $permalink, '%client_name%' ) == false )
        return $permalink;

    if ( is_object( $post ) && 'viz360_projects' == $post->post_type ) {
        $post_id = $post->ID;
        $client_id = get_post_meta($post_id, 'client', true);
        $var1 = basename(get_permalink($client_id));
        $var1 = sanitize_title($var1);
        $permalink = str_replace( '%client_name%', $var1, $permalink );
    }
    return $permalink;
}

add_filter( 'post_type_link', 'viz_remove_slug', 10, 3 );

function reflush_rules() {
    global $wp_rewrite;
    $wp_rewrite->flush_rules();
}
add_action( 'after_switch_theme', 'reflush_rules' );

If you are looking to change slug of custom post type or taxonomy. Please follow: https://gist.github.com/azizultex/2f8340c2c2c7ea18b6be57aadfc3ab76