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It's clearly depicted in the manual, about the mechanism of clone process: Public function _construct ( $attr_value )Įcho "f1.b.attr = ". $attr_array_value = clone $attr_array_value Note: This copies only one dimension arraysįoreach ( $this -> $attr_name as & $attr_array_value ) $this -> $attr_name = clone $this -> $attr_name Įlse if ( is_array ( $this -> $attr_name )) Just inherit your own classes from this base class. This base class automatically clones attributes of type object or array values of type object recursively.
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Any variables that are references, even to *themselves* (not necessarily to other variables), will be copied by reference rather than by value.
Copy object in lumion 8 manual#
This leads to the observation that although the manual states that 'Any properties that are references to other variables, will remain references,' this is not strictly true. This is HIGHLY idiosyncratic, but nevertheless it works. All you have to do is declare that it refers to itself. to convert an property from value type to reference type, without any extra references. It IS possible to create a reference with a reference count of 1 - i.e.
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I interpret this as the reference-count jumping from 2 straight to 0. unsetting all-but-one of the references will convert the remaining reference back into a value. String(5) "Hello" // p // note that this CONVERTS $a->p into a reference type!!Ģ. There IS however a non-programmatic ways to tell if an object property is value or reference type: I know of no programmatic way to tell if a variable is intrinsically a value or reference type. Object cloning is one of the few times when it can make a big difference. PHP treats variables as either 'values types' or 'reference types', where the difference is supposed to be transparent. Here are some cloning and reference gotchas we came up against at Last.fm.ġ.
Copy object in lumion 8 archive#
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