PhpSandbox\PHPSandbox::execute PHP Method

    public function execute($callable = null, $skip_validation = false)
    {
        $this->execution_time = microtime(true);
        $this->memory_usage = memory_get_peak_usage();
        if ($callable !== null) {
            $this->prepare($callable, $skip_validation);
        }
        $saved_error_level = null;
        if ($this->error_level !== null) {
            $saved_error_level = error_reporting();
            error_reporting(intval($this->error_level));
        }
        if (is_callable($this->error_handler) || $this->convert_errors) {
            set_error_handler([$this, 'error'], $this->error_handler_types);
        }
        if ($this->time_limit) {
            set_time_limit($this->time_limit);
        }
        $exception = null;
        $result = null;
        try {
            if ($this->capture_output) {
                ob_start();
                eval($this->generated_code);
                $result = ob_get_clean();
            } else {
                $result = eval($this->generated_code);
            }
        } catch (\Exception $exception) {
            //swallow any exceptions
        }
        if (is_callable($this->error_handler) || $this->convert_errors) {
            restore_error_handler();
        }
        usleep(1);
        //guarantee at least some time passes
        $this->memory_usage = memory_get_peak_usage() - $this->memory_usage;
        $this->execution_time = microtime(true) - $this->execution_time;
        if ($this->error_level !== null && $this->restore_error_level) {
            error_reporting($saved_error_level);
        }
        return $exception instanceof \Exception ? $this->exception($exception) : $result;
    }

 /**
  * Test whether sandbox disallows violating callbacks
  */
 public function testWhitelistMagicConstants()
 {
     $this->sandbox->whitelistMagicConst('DIR');
     $this->assertEquals(str_replace('tests', 'src', __DIR__), $this->sandbox->execute(function () {
         return __DIR__;
     }));
 }