First you have symbol table which has "a" entry, pointing to zval which
contains 1.
Second, you have two entries, "a" and "b", which point to zval with is_ref
= 1 and refcount 2.
Third, you have three entries, "a", "b" and "c", which all point to the
same zval, now having refcount 3.
I think time has come to have a closer look at zend code for some PHPers (including me). :)
regards
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