wp_ajax_add_link_category( string $action )

Source

function wp_ajax_add_link_category( $action ) {
	if ( empty( $action ) ) {
		$action = 'add-link-category';
	}

	check_ajax_referer( $action );

	$taxonomy_object = get_taxonomy( 'link_category' );

	if ( ! current_user_can( $taxonomy_object->cap->manage_terms ) ) {
		wp_die( -1 );
	}

	$names = explode( ',', wp_unslash( $_POST['newcat'] ) );
	$x     = new WP_Ajax_Response();

	foreach ( $names as $cat_name ) {
		$cat_name = trim( $cat_name );
		$slug     = sanitize_title( $cat_name );

		if ( '' === $slug ) {
			continue;
		}

		$cat_id = wp_insert_term( $cat_name, 'link_category' );

		if ( ! $cat_id || is_wp_error( $cat_id ) ) {
			continue;
		} else {
			$cat_id = $cat_id['term_id'];
		}

		$cat_name = esc_html( $cat_name );

		$x->add(
			array(
				'what'     => 'link-category',
				'id'       => $cat_id,
				'data'     => "<li id='link-category-$cat_id'><label for='in-link-category-$cat_id' class='selectit'><input value='" . esc_attr( $cat_id ) . "' type='checkbox' checked='checked' name='link_category[]' id='in-link-category-$cat_id'/> $cat_name</label></li>",
				'position' => -1,
			)
		);
	}
	$x->send();
}

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