wordprees multi-site in user panel - wordpress

Question

I want to add a new custom filter in WordPress network admin
restrict_manage_users for network admin in the user panel
I want a custom filter option not a custom column, i just want to add one filter dropdown with roles

Answer 1

You will need to hook on the ‘restrict_manage_posts‘ filters to add your filter (dropdown) and to ‘parse_query‘ to alter the query according to the filter selection.
For example, if you want to add a filter to display a list of years for the user to select, add the following code in your functions.php file:
if (is_admin()){
//this hook will create a new filter on the admin area for the specified post type
add_action( 'restrict_manage_posts', function(){
global $wpdb, $table_prefix;
$post_type = (isset($_GET['post_type'])) ? quote_smart($_GET['post_type'], true) : 'post';
//only add filter to post type you want
if ($post_type == 'YOUR_POST_TYPE_HERE'){
//query database to get a list of years for the specific post type:
$values = array();
$query_years = $wpdb->get_results("SELECT year(post_date) as year from ".$table_prefix."posts
where post_type='".$post_type."'
group by year(post_date)
order by post_date");
foreach ($query_years as &$data){
$values[$data->year] = $data->year;
}
//give a unique name in the select field
?><select name="admin_filter_year">
<option value="">All years</option>
<?php
$current_v = isset($_GET['admin_filter_year'])? $_GET['admin_filter_year'] : '';
foreach ($values as $label => $value) {
printf(
'<option value="%s"%s>%s</option>',
$value,
$value == $current_v? ' selected="selected"':'',
$label
);
}
?>
</select>
<?php
}
});
//this hook will alter the main query according to the user's selection of the custom filter we created above:
add_filter( 'parse_query', function($query){
global $pagenow;
$post_type = (isset($_GET['post_type'])) ? quote_smart($_GET['post_type'], true) : 'post';
if ($post_type == 'YOUR_POST_TYPE_HERE' && $pagenow=='edit.php' && isset($_GET['admin_filter_year']) && !empty($_GET['admin_filter_year'])) {
$query->query_vars['year'] = $_GET['admin_filter_year'];
}
});
}
Using this technique you can actually add any filter you want.
I hope this will solve your problem.

Answer 2

add_filter( 'wpmu_users_columns', 'my_awesome_new_column' );
add_action( 'manage_users_custom_column', 'my_awesome_column_data', 10, 3 );
// Creates a new column in the network users table and puts it before a chosen column
function my_awesome_new_column( $columns ) {
return my_awesome_add_element_to_array( $columns, 'my-awesome-column', 'Awesome', 'registered' );
}
// Adds data to our new column
function my_awesome_column_data( $value, $column_name, $user_id ) {
// If this our column, we return our data
if ( 'my-awesome-column' == $column_name ) {
return 'Awesome user ID ' . intval( $user_id );
}
// If this is not any of our custom columns we just return the normal data
return $value;
}
// Adds a new element in an array on the exact place we want (if possible).
function my_awesome_add_element_to_array( $original_array, $add_element_key, $add_element_value, $add_before_key ) {
// This variable shows if we were able to add the element where we wanted
$added = 0;
// This will be the new array, it will include our element placed where we want
$new_array = array();
// We go through all the current elements and we add our new element on the place we want
foreach( $original_array as $key => $value ) {
// We put the element before the key we want
if ( $key == $add_before_key ) {
$new_array[ $add_element_key ] = $add_element_value;
// We were able to add the element where we wanted so no need to add it again later
$added = 1;
}
// All the normal elements remain and are added to the new array we made
$new_array[ $key ] = $value;
}
// If we failed to add the element earlier (because the key we tried to add it in front of is gone) we add it now to the end
if ( 0 == $added ) {
$new_array[ $add_element_key ] = $add_element_value;
}
// We return the new array we made
return $new_array;
}
Here is an example : https://wordpress.stackexchange.com/questions/299801/custom-column-under-all-users-multisite-network-admin