get categories wp code example

Example 1: display category name wordpress

<?php
$categories = get_the_category();
if ( ! empty( $categories ) ) {
	echo '<a href="' . esc_url( get_category_link( $categories[0]->term_id ) ) . '">' . esc_html( $categories[0]->name ) . '</a>';
}
?>

Example 2: get_categories not__in

$categories = get_categories(array(
  'exclude' => $post_id,
));