civicrm.settings.php

<?php
global $civicrm_root, $civicrm_setting, $civicrm_paths;

// CMS specific stuff
define('CIVICRM_UF', 'WordPress');
$civicrm_root = '/var/www/html/wp-content/plugins/civicrm/civicrm/';
define('CIVICRM_TEMPLATE_COMPILEDIR', '/var/www/html/wp-content/uploads/civicrm/templates_c/');

// Constants set by env variables
define('CIVICRM_DSN', 'mysql://' . getenv('CIVICRM_DB_USER') . ':' . getenv('CIVICRM_DB_PASS') . '@' . getenv('CIVICRM_DB_HOST') . '/' . getenv('CIVICRM_DB_NAME') . '?new_link=true');
define('CIVICRM_UF_DSN', 'mysql://' . getenv('WORDPRESS_DB_USER') . ':' . getenv('WORDPRESS_DB_PASS') . '@' . getenv('WORDPRESS_DB_HOST') . '/' . getenv('WORDPRESS_DB_NAME') . '?new_link=true');
define('CIVICRM_UF_BASEURL', getenv('BASE_URL'));
define('CIVICRM_TEMPLATE_COMPILE_CHECK', getenv('CIVICRM_TEMPLATE_COMPILE_CHECK'));
define('CIVICRM_SITE_KEY', getenv('CIVICRM_SITE_KEY'));
define('CIVICRM_CRED_KEYS', getenv('CIVICRM_CRED_KEYS'));
define('CIVICRM_SIGN_KEYS', getenv('CIVICRM_SIGN_KEYS'));

// Smarty version - this is a temporary measure that we can remove when Smarty 5 becomes the default
// See https://lab.civicrm.org/dev/core/-/issues/4146
if (getenv('CIVICRM_SMARTY_VERSION') == '5') {
  define('CIVICRM_SMARTY_AUTOLOAD_PATH', $civicrm_root . '/packages/smarty5/Smarty.php');
}

// Set the environment e.g. 'Production', 'Staging', 'Development'
if (getenv('CIVICRM_ENVIRONMENT')) {
  $civicrm_setting['domain']['environment'] = getenv('CIVICRM_ENVIRONMENT');
}

// Predefined constants
define('CIVICRM_LOGGING_DSN', CIVICRM_DSN);
define('CIVICRM_DOMAIN_ID', 1);
define('CIVICRM_MAIL_SMARTY', 0);
define('CIVICRM_DB_CACHE_CLASS', 'ArrayCache');
define('CIVICRM_PSR16_STRICT', FALSE);
define('CIVICRM_DEADLOCK_RETRIES', 3);
define('CIVICRM_EXCLUDE_DIRS_PATTERN', '@/(\.|node_modules|js/|css/|bower_components|packages/|sites/default/files/private)@');

// Include path
$include_path = '.' . PATH_SEPARATOR .
  $civicrm_root . PATH_SEPARATOR .
  $civicrm_root . DIRECTORY_SEPARATOR . 'packages' . PATH_SEPARATOR .
  get_include_path();
if (set_include_path($include_path) === FALSE) {
  echo "Could not set the include path<p>";
  exit();
}

// Clean URLs
if (!defined('CIVICRM_CLEANURL')) {
  if (function_exists('variable_get') && variable_get('clean_url', '0') != '0') {
    define('CIVICRM_CLEANURL', 1);
  }
  elseif (function_exists('config_get') && config_get('system.core', 'clean_url') != 0) {
    define('CIVICRM_CLEANURL', 1);
  }
  elseif (function_exists('get_option') && get_option('permalink_structure') != '') {
    define('CIVICRM_CLEANURL', 1);
  }
  else {
    define('CIVICRM_CLEANURL', 0);
  }
}

// More stuff that probably shouldn't be in a settings file
$memLimitString = trim(ini_get('memory_limit'));
$memLimitUnit   = strtolower(substr($memLimitString, -1));
$memLimit       = (int) $memLimitString;
switch ($memLimitUnit) {
  case 'g':
    $memLimit *= 1024;
  case 'm':
    $memLimit *= 1024;
  case 'k':
    $memLimit *= 1024;
}
if ($memLimit >= 0 and $memLimit < 134217728) {
  ini_set('memory_limit', '128M');
}
require_once 'CRM/Core/ClassLoader.php';
CRM_Core_ClassLoader::singleton()->register();