Variable name edit (PHP)

When I double click variable name and paste a new one, including the dollar sign: (PHP, [...] = selection)

1. $varName = "value";

2. $[varName] = "value";

3. Paste [$newVarName] from Clipboard

4. $newVarName = "value";

the dollar sign isn't added again, which is very comfortable. However, when i paste an expression, like:

1. $varName

2. $[varName]

3. Paste [$newVarName = "value"] from Clipboard

4. $$newVarName = "value"

and it does not... It would be very nice if it worked in this case too :).