WordPress get user dropdown by role
We needed a function to get a user selectbox by the user role. Instead of using the native wordpress function wp_dropdown_users() to get a list of all users we decided to create our own.
This function allows you to easily create a dropdown based on the user role.
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function getUsersByRole($role,$name,$selected = '',$extra = '') { global $wpdb; $wp_user_search = new WP_User_Query(array("role"=> $role)); $role_data = $wp_user_search->get_results(); foreach($role_data as $item){ $role_data_ids[] = $item->ID; } $ids = implode(',', $role_data_ids); $r = $wpdb->get_results("SELECT * from ".$wpdb->prefix . "users where id IN(".$ids .")", ARRAY_A); $content .='<select name="'.$name.'" id="'.$name.'" '.$extra.'>'; if($selected == ''){ $content .='<option value="" selected="selected">Choose a user</option>'; }else{ $r_user = $wpdb->get_results("SELECT * from ".$wpdb->prefix . "users where ID = ".$selected."", ARRAY_A); $content .='<option value="'.$selected.'" selected="selected">'.stripslashes($r_user[0]['display_name']).'</option>'; } for($i=0; $i<count($r); $i++){ $content .='<option value="'.$r[$i]['ID'].'">'.stripslashes($r[$i]['display_name']).'</option>'; } $content .='</select>'; return $content; } |
Now to use this function in your plugin do the following:
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// the first field is the user role // the second field is the name and id attributes for the selectbox //the third field is optional and will allow you to set a selected state // the fourth field optional is any special attributes you want to add into the select for instance an on change echo getUsersByRole('subscriber','user_id', $r[0]['user_id'],'onchange="dosomething()"'); // or just use which will not set a default selected user or any extra attributes echo getUsersByRole('subscriber','user_id'); |
If you have any questions please ask, this also works with the role editor plugin. (great for custom roles!)
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Showing 6 comments
Updated function with minor bugfix.
Your function didn't seem to work for me. I had to replace count( $r ) on line 22 with $wpdb->num_rows. Otherwise, thanks for the useful function!
it is escaping me but, how do I save the selection of the dropdown menu to the database, I added another column to sales log page of wp e-commerce for this dropdown menu of staff role users so I can assign a staff member to specific sales. so now I need to save to the db the staff member I select from this dropdown.
Anthony Brown – wondering if you seen this message yet?
This function gives an error as:
Warning: implode() [function.implode]: Invalid arguments passed .
To make it work, $role_data_ids must be declarated as an array before foreach loop.
function getUsersByRole($role,$name,$selected = '',$extra = '') {
global $wpdb;
$wp_user_search = new WP_User_Query(array('role' => $role));
$role_data = $wp_user_search->get_results();
$role_data_ids = array();
foreach($role_data as $item){
$role_data_ids[] = $item->ID;
}
$ids = implode(',', $role_data_ids);
$r = $wpdb->get_results("SELECT * from ".$wpdb->prefix . "users where id IN(".$ids .")", ARRAY_A);
$content .='<select name="'.$name.'" id="'.$name.'" '.$extra.'>';
if($selected == ''){
$content .='<option value="" selected="selected">Selecteaza partener</option>';
}else{
$r_user = $wpdb->get_results("SELECT * from ".$wpdb->prefix . "users where ID = ".$selected."", ARRAY_A);
$content .='<option value="'.$selected.'" selected="selected">'.stripslashes($r_user[0]['display_name']).'</option>';
}
for($i=0; $i<count($r); $i++){
$content .='<option value="'.$r[$i]['ID'].'">'.stripslashes($r[$i]['display_name']).'</option>';
}
$content .='</select>';
return $content;
}
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