Export all WordPress user roles to CSV file

export-roles-csv.php

<?php
/* Project: User Role Editor WordPress plugin
 * Adds admin menu item "Tools->Export roles (CSV)" and allows to export all user roles to CSV file with one click
 * Setup: Install as a Must Use plugin: https://codex.wordpress.org/Must_Use_Plugins
 * Author: Vladimir Garagulia
 * Email: support@role-editor.com
 * Site: https://role-editor.com
 * License: GPL v.3
 */
 
 class URE_Export_Roles_CSV {
 
     function __construct() {
         
         add_action( 'admin_menu', array( $this, 'menu' ) );         
         add_action( 'admin_init', array($this, 'act'));
         
     }
     // end of __construct();
              
     
     public function menu() {
     
         add_management_page( 
                 'Export Roles (CSV)', 
                 'Export Roles (CSV)', 
                 'ure_export_roles', 
                 'ure-export-roles-csv', 
                 array( $this, 'show' ) 
                 );
         
     }
     // end of menu()
               
     
     private function caps_to_string( $capabilities ) {
         
         if ( empty( $capabilities ) ) {
             return '';
         }
         $caps = array();
         foreach( $capabilities as $cap=>$allowed ) {
             if ( $allowed ) {
                 $caps[] = $cap;
             }             
         }
         
         $caps_str = implode( ',', $caps );
         
         return $caps_str;
     }
     // end of caps_to_string()
     
     private function send_data( $data ) {
        
        $timestamp = date('_Y-m-d_h_i_s', current_time('timestamp'));       
        $file_name = 'wp_roles'. $timestamp .'.csv';

        header('Pragma: public');
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Cache-Control: private', false); // required for certain browsers 
        header('Content-Type: application/pdf');
        header('Content-Disposition: attachment; filename="'. $file_name .'"');
        header('Content-Transfer-Encoding: binary');
        header('Content-Length: ' . strlen($data));

        echo $data;
    }
    // end of send_data()

    
    private function is_applicable() {
        global $pagenow;
        
        if ($pagenow!=='tools.php') {
            return false; 
        }
        if ( !isset($_GET['page']) || $_GET['page']!=='ure-export-roles-csv' ) {
            return false;
        }

        return true;
    }
    // end of is_applicable()
    
    
    public function act() {
        if (!$this->is_applicable()) {
            return;
        }
        
        $wp_roles = wp_roles();
        $roles = $wp_roles->roles;
        $data = '"role_id";"role_name";"capabilities"' . PHP_EOL;
        foreach ($roles as $role_id => $role) {
            $caps = $this->caps_to_string($role['capabilities']);
            $data .= sprintf('"%s","%s","%s"', $role_id, $role['name'], $caps) . PHP_EOL;
        }

        $this->send_data($data);
        exit;
    }
    // end of act()
    
}
 // end of URE_Export_Roles_CSV

 new URE_Export_Roles_CSV();