How to create new property dynamically

Question

How can I create a property from a given argument inside a object's method?

class Foo{    public function createProperty($var_name, $val){     // here how can I create a property named "$var_name"     // that takes $val as value?    }  } 

And I want to be able to access the property like:

$object = new Foo(); $object->createProperty('hello', 'Hiiiiiiiiiiiiiiii');  echo $object->hello; 

Also is it possible that I could make the property public/protected/private ? I know that in this case it should be public, but I may want to add some magik methods to get protected properties and stuff :)

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I think I found a solution:

  protected $user_properties = array();    public function createProperty($var_name, $val){     $this->user_properties[$var_name] = $val;    }    public function __get($name){     if(isset($this->user_properties[$name])       return $this->user_properties[$name];    } 

do you think it's a good idea?

Answer 1

The following example is for those who do not want to declare an entire class.

$test = (object) [];  $prop = 'hello';  $test->{$prop} = 'Hiiiiiiiiiiiiiiii';  echo $test->hello; // prints Hiiiiiiiiiiiiiiii 

Answer 2

There are two methods to doing it.

One, you can directly create property dynamically from outside the class:

class Foo{  }  $foo = new Foo(); $foo->hello = 'Something'; 

Or if you wish to create property through your createProperty method:

class Foo{     public function createProperty($name, $value){         $this->{$name} = $value;     } }  $foo = new Foo(); $foo->createProperty('hello', 'something');