Destructor (ASP Classic and PHP Cross Reference Guide)

General Info: Class Destructor

A special class method called when an object instance of a class is destroyed. With some languages they are called when the object instance goes out of scope, with some languages you specifically have to call the destructor in code to destroy the object, and others use a garbage collector to dispose of object instances at specific times.

Desctructors are commonly used to free the object instance but with languages that have a garbage collector object instances are disposed of when appropriate. Either way, destructors or their equivalent are commonly used to free up resources allocated in the class constructor.

Languages Focus

Are object instances freed with a garbage collector? Or, do you have to destroy object instances.

ASP Classic:   Class_Terminate When an object instance is destroyed, ASP calls a special parameter-less sub named Class_Terminate. For example, when the variable falls out of scope. Since you cannot specify parameters for this sub, you also cannot overload it. To explicitly destroy an object, use Set YourClass = nothing. If the Class object is explicitly destroyed, the client returns with the script engine error details. When an object instance is created from a class, ASP calls a special sub called Class_Initialize. Syntax Example: Class Cyborg Public Sub Class_Terminate Response.Write "<br>Class destroyed" End Sub End Class  ASP Classic Destructor (Class_Terminate)

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