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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 'x'; b($a); function b($a){ debug_zval_dump($a);//refcount=4 why not 3? }
Output for 7.0.0 - 7.1.0, 7.1.7 - 7.2.6
string(1) "x" refcount(1)
Output for 4.3.0 - 5.6.28, 7.1.5 - 7.1.6
string(1) "x" refcount(4)