Resources
Resources
A is a special variable, holding a reference to an
external resource. Resources are created and used by special functions. See
the for a listing of all these
functions and the corresponding types.
resourceappendixresource
See also the function.
get_resource_type
Converting to resource
As variables hold special handles to opened files,
database connections, image canvas areas and the like, converting to a
makes no sense.
resource``resource
Freeing resources
Thanks to the reference-counting system being part of Zend Engine,
a with no more references to it is detected
automatically, and it is freed by the garbage collector. For this reason, it
is rarely necessary to free the memory manually.
resource
Opmerking: > Persistent database links are an exception to this rule. They are destroyed by the garbage collector. See the section for more information. notpersistent connections