Configure PHP APCu setting

{
  "type": "object",
  "properties": {
    "apcu_size": {
      "type": "integer",
      "format": "int32",
      "description": "The APcu size."
    },
    "domainName": {
      "type": "string"
    },
    "domain_name": {
      "type": "string",
      "description": "Linux hosting domain name"
    },
    "enabled": {
      "type": "boolean",
      "description": "Enables or disables APC."
    }
  },
  "required": [
    "domainName",
    "domain_name"
  ],
  "additionalProperties": false
}