A resource is a special variable, holding a reference to an external resource.

Resources are created and used by special functions.

Converting to resource

As resource variables hold special handles to opened files, database connections, image canvas areas and the like, converting to a resource makes no sense.

Freeing resources

Thanks to the reference-counting system being part of Zend Engine, a resource with no more references to it is detected automatically, and it is freed by the garbage collector.

resource — Structure map

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resource — Related pages: