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<?php function g($str = null){ echo "g"; $g = function ($test = null){ echo "o"; return $g = function ($test1 = null){ echo "o"; }; }; return $g; } var_dump(g()());
Output for git.master, git.master_jit, rfc.property-hooks
goobject(Closure)#2 (1) { ["parameter"]=> array(1) { ["$test1"]=> string(10) "<optional>" } }

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