actualwave/object

PHP-Object

Non dynamic base object class for PHP. Allows making getters and setters via get* and set* methods with public/protected accessor. Not defined properties will throw error. Basically instead of shared magic methods __set, __get, __isset, __unset you can define individual methods for each property:

• get* - get[Property name from upper-case char], for reading property value.
• set* - set[Property name from upper-case char], for setting property new value.
• has* - has[Property name from upper-case char], for checking is property set.
• remove* - remove[Property name from upper-case char], for removing(using unset() on it) property.

has* and remove* methods have default action and are optional. By default, has* will always return true for properties with defined getter and remove* will try to pass null into setter.

class MyObject extends \aw\Object {
    private $_property = null;
    public function getProperty(){
        return 'GET-'.$this->_property;
    }
    public function setProperty($value){
        $this->_property = 'SET-'.$value;
    }
    public function getData(){
        return 'DATA:'.$this->hiddenProperty;
    }
    protected function getHiddenProperty(){
        return 'hidden value';
    }
}

Instances of MyObject will be non-dynamic objects with one read-write property property that can be accessed via $instance->property and two read-only properties -- hiddenProperty and its alias data.

$instance = new MyObject();
echo $instance->property.PHP_EOL; // GET-
$instance->property = 'something';
echo $instance->property.PHP_EOL; // GET-SET-something
echo $instance->getData().PHP_EOL; // DATA:hidden value
echo $instance->data.PHP_EOL; // DATA:hidden value
echo $instance->anyProperty.PHP_EOL; // throws error Property accessor "anyProperty" not found.

You can change behaviour of your property when isset/unset are used via has* and remove* methods.

class StringProperty extends \aw\Object {
    private $_property = '';
    public function getProperty():string {
        return $this->_property;
    }
    public function setProperty(string $value) {
        $this->_property = $value;
    }
    protected function hasProperty():bool {
        return (bool)$this->_property;
    }
    protected function removeProperty() {
        $this->_property = '';
    }
}

Then check if your property is empty or set it to be empty:

$prop = new StringProperty();
echo json_encode(isset($prop->property)).PHP_EOL; // false
$prop->property = 'value';
echo json_encode(isset($prop->property)).PHP_EOL; // true
unset($prop->property);
echo json_encode($prop->property).PHP_EOL; // "" -- will output empty string in JSON format
echo json_encode(isset($prop->property)).PHP_EOL; // false

Note: Defining has* and remove* methods is optional, but without them you will not be able to define logic for isset() and unset() actions over your property. Without them unset/delete property via unset() just tries to pass null into property mutator method and even if property set to null, isset() will always return true:

class MySimpleObject extends \aw\Object {
    private $_property = null;
    public function getProperty(){
        return $this->_property;
    }
    public function setProperty($value){
        $this->_property = $value;
    }
}

$simple = new MySimpleObject();
$simple->property = 'something';
echo 'Is set: '.json_encode(isset($simple->property)).PHP_EOL; // Is set: true
echo 'Is null: '.json_encode(is_null($simple->property)).PHP_EOL; // Is null: false
unset($simple->property);
echo 'Is set: '.json_encode(isset($simple->property)).PHP_EOL; // Is set: true
echo 'Is null: '.json_encode(is_null($simple->property)).PHP_EOL; // Is null: true