php overload = operator [duplicate]
No. PHP doesn't support operator overloading, with a few exceptions (as noted by @NikiC: "PHP supports overloading of some operators, like [], -> and (string) and also allows overloading some language constructs like foreach").
You can imitate such a feature for class-properties, by using the PHP-magic-function __set() and setting the respective property to private/protected.
class MyClass{ private $a; public function __set($classProperty, $value) { if($classProperty == 'a') { // your overloadis()-logic here, e.g. // if($value instanceof SomeOtherClass) // $this->$classProperty = $value; } }}$myClassInstance = new MyClass();$myClassInstance->a = new SomeOtherClass();$myClassInstance->a = 'c';