Is destructor in PHP predictable?

Question

Is a class destructor in PHP predictable? When is the destructor called?

Like in many languages, will a class destructor be called as soon as the object goes out of

Answer 1

PHP 5 introduces a destructor concept similar to that of other object-oriented languages, such as C++. The destructor method will be called as soon as all references to a particular object are removed or when the object is explicitly destroyed or in any order in shutdown sequence.

http://php.net/manual/en/language.oop5.decon.php