redis-8.x-1.x-dev/redis.install

<?php

/**
 * @file
 * Redis install related functions.
 */

/**
 * Implements hook_requirements().
 */
function redis_requirements($phase) {

  // This module is configured via settings.php file. Using any other phase
  // than runtime to proceed to some consistency checks is useless.
  if ('runtime' !== $phase) {
    return [];
  }

  $requirements = [];

  $factory = \Drupal::service('redis.factory');

  if ($factory->hasClient()) {
    $requirements['redis'] = [
      'title'       => "Redis",
      'value'       => t("Connected, using the <em>@name</em> client.", ['@name' => $factory->getClientName()]),
      'severity'    => REQUIREMENT_OK,
    ];
  }
  else {
    $requirements['redis'] = [
      'title'       => "Redis",
      'value'       => t("Not connected."),
      'severity'    => REQUIREMENT_WARNING,
      'description' => t("No Redis client connected, this module is therefore not used. Ensure that Redis is configured correctly, or disable this module."),
    ];
  }

  return $requirements;
}