
**php_config**:
    Type(s): ``array``, Default: ``[]``

  Key value array of ini settings, e.g. ``{"max_execution_time":100}``

**safe_parameters**:
    Type(s): ``bool``, Default: ``true``

  INTERNAL: Use process process-safe parameters, this option exists for backwards-compatibility and will be removed in PHPBench 2.0

**callback**:
    Type(s): ``Closure``, Default: ``{}``

**output_dir**:
    Type(s): ``string``, Default: ``xdebug``