How to filter categories of a post

Question

Is there any way to filter the categories of a post? I am using wp_get_post_categories( $post -> ID ); i want to filter this listing i.e. if(post_name or post_id == "some id or some name") {it should not be displayed}

Answer 1

have you tried something like,

$post_categories = wp_get_post_categories( $post -> ID  );

foreach($post_categories as $c){
    $cat = get_category( $c );
    if ( $cat->slug != "cat" ) {
       echo "$cat->name";
    };
}

Answer 2

You can do this by using in_category():

$post_categories = wp_get_post_categories( $post->ID );

foreach( $post_categories as $cat_id ) {
    if ( in_category( $cat_id, POST_ID ) ) {
        // it should not be displayed
    } else {
        // it should be displayed
    }
}

Where POST_ID should be the ID of the post wich you want to check.