Youzify - BuddyPress Disable Groups Posting For Members.

yzc_disable_groups_posting_for_members.php

<?php
/**
 * Youzify - BuddyPress Disable Groups Posting Form For Members.
 */
function yzc_disable_groups_posting_form_for_members( $active ) {

    if ( is_super_admin() || ! bp_is_active( 'groups' ) || ! bp_is_group() ) {
        return true;
    }

    // Get Logged In User ID
    $user_id = bp_loggedin_user_id();
    
    // Get Current Group ID.
    $group_id = bp_get_current_group_id();

    if ( ! groups_is_user_admin( $user_id, $group_id ) ) {
        return false;
    }


    return $active;
}

add_filter( 'youzify_is_wall_posting_form_active', 'yzc_disable_groups_posting_form_for_members' );

/**
 * Add Groups Filter
 */
add_action( 'youzify_before_wall_post_form_actions', 'yzc_add_activity_post_in_groups_filter' );

function yzc_add_activity_post_in_groups_filter() {
    add_filter( 'groups_get_groups', 'yzc_remove_activity_post_in_groups' );
}

/**
  * Remove Groups Filter.
  */

add_action( 'bp_activity_post_form_options', 'yzc_remove_activity_post_in_groups_filter' );

function yzc_remove_activity_post_in_groups_filter() {
    remove_filter( 'groups_get_groups', 'yzc_remove_activity_post_in_groups' );
}

/**
 * Remove Activity "Post In" Groups That User Is Not Admin Of Them.
 */
function yzc_remove_activity_post_in_groups( $data ) {

    // Get Groups
    $groups = isset( $data['groups'] ) ? $data['groups'] : '';

    if ( empty( $groups ) ) {
        return $data;
    }
    
    // Get Logged In User ID
    $user_id = bp_loggedin_user_id();
    
    foreach ( $groups as $key => $group ) {

        if ( ! groups_is_user_admin( $user_id, $group->id ) ) {
            unset( $data['groups'][ $key ] );
        }

    }

    return $data;
}