Add custom tab on buddypress group page

buddypress-group-subtab.php

<?php

/**
 * Add custom sub-tab on groups page.
 */
function buddypress_custom_group_tab() {

	// Avoid fatal errors when plugin is not available.
	if ( ! function_exists( 'bp_core_new_subnav_item' ) ||
		 ! function_exists( 'bp_is_single_item' ) ||
		 ! function_exists( 'bp_is_groups_component' ) ||
		 ! function_exists( 'bp_get_group_permalink' ) ||
		 empty( get_current_user_id() ) ) {

		return;

	}

	// Check if we are on group page.
	if ( bp_is_groups_component() && bp_is_single_item() ) {

		global $bp;

		// Get current group page link.
		$group_link = bp_get_group_permalink( $bp->groups->current_group );

		// Tab args.
		$tab_args = array(
			'name'                => esc_html__( 'Group Custom Tab', 'default' ),
			'slug'                => 'group-custom-tab',
			'screen_function'     => 'group_custom_tab_screen',
			'position'            => 60,
			'parent_url'          => $group_link,
			'parent_slug'         => $bp->groups->current_group->slug,
			'default_subnav_slug' => 'group-custom-tab',
			'item_css_id'         => 'group-custom-tab',
		);

		// Add sub-tab.
		bp_core_new_subnav_item( $tab_args, 'groups' );
	}
}

add_action( 'bp_setup_nav', 'buddypress_custom_group_tab' );

/**
 * Set template for new tab.
 */
function group_custom_tab_screen() {

	// Add title and content here - last is to call the members plugin.php template.
	add_action( 'bp_template_title', 'custom_group_tab_title' );
	add_action( 'bp_template_content', 'custom_group_tab_content' );
	bp_core_load_template( 'buddypress/members/single/plugins' );

}

/**
 * Set title for custom tab.
 */
function custom_group_tab_title() {
	echo esc_html__( 'Custom Tab', 'default_content' );
}

/**
 * Display content of custom tab.
 */
function custom_group_tab_content() {

	echo sprintf(
		/* translators: %1$s goes for content text. */
		'<h3>%1$s</h3>',
		esc_html__( 'Content goes here for custom tab', 'default' )
	);

}

Hello @BhargavBhandari90 Thanks for this brilliant code. Is it possible to make this tab visible for everyone (for non-members as well as for non-logged-in users), even in a private group? Thanks for your help to do this

That workded for me as well. Thank you so much for your contribution.