ref.php

<?php

class MyObject
{
    public $_aaa = 'aaa';
    protected $_bbb = 'bbb';
    private $_ccc = 'ccc';
}



$obj = new MyObject();

echo 'protected: ', getNonpublicProperty($obj, '_bbb'), PHP_EOL;
echo 'private: ', getNonpublicProperty($obj, '_ccc'), PHP_EOL;


function getNonpublicProperty($obj, $property_name)
{
    if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
        $ref = new ReflectionProperty(get_class($obj), $property_name);
        $ref->setAccessible(true);
        return $ref->getValue($obj);
    } else {
        $class = get_class($obj);

        $temp_child_class = "temp" . str_replace("_", "", "$class");

        if (!class_exists($temp_child_class)) {
            $ref         = new ReflectionClass($class);
            $constructor = $ref->getConstructor();

            $abstract_methods = "";
            foreach($ref->getMethods(ReflectionMethod::IS_ABSTRACT) as $method) {
                $mname = $method->name;
                $abstract_methods .= "public function $mname(){return false;}";
            }

            $class_def = "
class $temp_child_class extends $class{
    $constructor
    public function get_property(\$property_name)
    {
        return \$this->\$property_name;
    }
    $abstract_methods
}
";

            eval($class_def);
        }

        $tcobj = new $temp_child_class;

        return $tcobj->get_property($property_name);
    }
}

ref2.php

<?php

class MyObject
{
    public $_aaa = 'aaa';
    protected $_bbb = 'bbb';
    private $_ccc = 'ccc';
}



$obj = new MyObject();

echo 'protected: ', getNonpublicProperty($obj, '_bbb'), PHP_EOL;
echo 'private: ', getNonpublicProperty($obj, '_ccc'), PHP_EOL;


function getNonpublicProperty($obj, $property_name)
{
    if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
        $ref = new ReflectionProperty(get_class($obj), $property_name);
        $ref->setAccessible(true);
        return $ref->getValue($obj);
    } else {
        $arr = (array)$obj;
        $key = $property_name;

        $ref = new ReflectionProperty(get_class($obj), $property_name);
        if ($ref->isProtected()) {
            $key = "\0*\0".$key;
        } elseif ($ref->isPrivate()) {
            $key = "\0".get_class($obj)."\0".$key;
        }

        return $arr[$key];
    }
}